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Reality Expansion Pack for Laminar Cessna C172SP Skyhawk

Cessna 172 Skyhawk · Systems Description

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Overview

The document is a systems description for the Cessna 172SP Skyhawk, part of the Reality Expansion Pack developed by SimCoders.com for flight simulation. It provides detailed information on the aircraft's systems, installation procedures, and configuration for use with X-Plane 11. The manual is intended for flight simulation enthusiasts and pilots looking to enhance their experience with the Cessna 172SP model. It covers various aspects of the aircraft, including its powerplant, fuel system, electrical systems, and maintenance procedures, as well as user interface features and recommended settings for optimal performance.

  • The Cessna 172SP is a single-engine, high-wing aircraft with a maximum seating capacity of four.
  • Installation of the Reality Expansion Pack requires the default Cessna 172SP model in X-Plane.
  • The aircraft features a larger fuel tank compared to earlier models, affecting passenger capacity.
  • The Mass & Balance tool is essential for ensuring safe loading of the aircraft.
  • Regular maintenance checks can be tracked and managed through the Maintenance Report feature.

In this document

Aircraft General Description

The Cessna 172 Skyhawk is a four-seat, single-engine, high-wing aircraft manufactured by Cessna. It is known for its longevity and popularity, with over 43,000 units built since its introduction in 1956. The 172SP variant features larger fuel tanks, allowing for extended range, which may reduce passenger capacity.

Installation & Configuration

To install the Reality Expansion Pack, users must have the default Cessna 172SP Skyhawk installed in X-Plane. The installation process involves copying specific files into designated folders within the X-Plane directory. The document also outlines system requirements, including a dual-core processor and 2 GB of RAM.

Systems Description

This section details the various systems of the Cessna 172SP, including the powerplant, fuel system, electrical systems, and avionics. It provides insights into the engine's operation, maintenance requirements, and troubleshooting tips.

Mass & Balance

The Mass & Balance tool allows users to load the aircraft accurately, ensuring that the center of gravity remains within safe limits. The document explains how to interpret the loading graph and the consequences of exceeding weight limits.

Maintenance Report

The Maintenance Report feature provides users with a comprehensive overview of the aircraft's status, including necessary repairs and maintenance tasks. Users can interact with the report to manage the aircraft's upkeep effectively.

Safety notes

  • Always perform a pre-flight walkaround and inspection before each flight.
  • Ensure that all static elements, such as pitot covers and tie-downs, are removed before taxiing.
Full document text

SimCoders.com Reality Expansion Pack for Laminar Cessna C172SP Skyhawk v4.8.11 May 24, 2025 1 Reality Expansion Pack Cessna C172SP Skyhawk CONTENTS Contents AIRCRAFT GENERAL DESCRIPTION 5 INSTALLATION & CONFIGURATION 6 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Base Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Install the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Automatic Update of the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Manual Update of the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Remove the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Recommended sound settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Recommended control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 HARDWARE & SOFTWARE COMPATIBILITY 10 Headshake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Saitek Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 XPRealistic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Differential and progressive brakes for X-Plane 11 . . . . . . . . . . . . . . . . . . . . . 10 USER INTERFACE 11 Lateral Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Maintenance Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Kneeboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Mass & Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Walkaround . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Move the viewpoint while doing the walkaround in 2D . . . . . . . . . . . . . . . . 16 Walkaround in VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Move the viewpoint while towing in 2D . . . . . . . . . . . . . . . . . . . . . . . . 17 Towing in VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Engine Autostart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Settings Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Use Advanced Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Use Advanced Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Use VR Walkaround and Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Wait for real weather at startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 In flight tips vertical offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Economy System 21 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Enabling the Economy System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 FSEconomy: Aircraft Key Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Maintenance and Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Buying and Selling Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Earning Money: Rewards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 2 Reality Expansion Pack Cessna C172SP Skyhawk CONTENTS VR Support 27 How to open the plugin windows in VR . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 SOUNDS SYSTEM 28 PERSISTENT AIRCRAFT AND COMPONENTS WEARING 29 Reality Expansion Pack – Wear & Tear System 29 Loading a Worn-Out Aircraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Checking Component Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Hobbs Time and Tach Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Hobbs Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Tach Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 SYSTEMS DESCRIPTION 31 Powerplant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Engine Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Induction System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Spark Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Oil System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 The Red Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Engine Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Preheater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Engine Startup Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Vacuum System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Electrical Systems & Avionics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Electrical Gyros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Radio Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Spring loaded nose wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 HUMAN FACTOR 41 Hypoxia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 TUC & EPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 HOME COCKPITS/CUSTOM DATAREFS 43 RESOURCES & HOW-TOs 50 SUPPORT & CONTACTS 50 VERSION CHANGELOG 51 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 3 Reality Expansion Pack Cessna C172SP Skyhawk CONTENTS LICENCE 68 SOFTWARE PRODUCT LICENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 LibCURL EULA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 COPYRIGHT AND PERMISSION NOTICE . . . . . . . . . . . . . . . . . . . . . . . . 70 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 4 Reality Expansion Pack Cessna C172SP Skyhawk AIRCRAFT GENERAL DESCRIPTION The Cessna 172 Skyhawk s a four-seat, single-engine, high wing, fixed-wing aircraft made by the Cessna Aircraft Company. First flown in 1955, more 172s have been built than any other aircraft. Measured by its longevity and popularity, the Cessna 172 is the most successful aircraft in history. Cessna delivered the first production model in 1956 and as of 2015, the company and its partners had built more than 43,000. The aircraft remains in production today. The modern avionics, the useful load and the simplicity of flying it make the Cessna 172SP a perfect airplane for both training and recreational flights. Since the R version, the Cessna 172 has bigger fuel tanks. The extended range may reduce the number of passengers it can carry. Therefore, pilots often trade a little bit of fuel for another person onboard. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 5 Reality Expansion Pack Cessna C172SP Skyhawk INSTALLATION & CONFIGURATION System requirements This software requires X-Plane 11.00 or superior. The minimum hardware requirements are the same of X-Plane: • Dual Core, 2.5 GHz or faster • 2 GB of RAM • A video card with at least 500 MB of VRAM. This software is designed to run on Windows, MacOS and Linux. Linux If you use REP on Linux, there are some addictional requirements: • libstdc++6 • libgcc6 • libcurl • libssl • libcrypto On Steam: Right-click on X-Plane 12, select Properties, navigate to Compatibility, check the box for “Force the use of a specific Steam compatibility tool,” and choose “Steam Linux Runtime 3.0 Sniper” or “Legacy Runtime 1.0” from the dropdown menu. Base Airplane In order to install this software, the Default X-Plane Cessna 172SP Skyhawk must be installed on your system. Install the software Note: A video tutorial is available on our YouTube Channel To install the software please follow this procedure. 1. Locate the C172SP Skyhawk folder inside your X-Plane installation. 2. Clone the C172SP Skyhawk folder and call it “C172SP Skyhawk REP”. 3. Extract the contents of this REP package into a temporary folder 4. Move the contents of “into-aircraft-plugins-folder” into the “C172SP Skyhawk REP/plugins” folder 5. Move the contents of “into-aircraft-main-folder” into the “C172SP Skyhawk REP” folder 6. Run X-Plane and load the C172SP Skyhawk. 7. Follow the onscreen instructions NOTE ©SimCoders.com - For flight simulation only. Do not use for real flight Page 6 Reality Expansion Pack Cessna C172SP Skyhawk Install the software After reloading the airplane, X-Plane may crash reporting an error related to the “master.bank” file. If that’s the case, please follow the instructions stated in this FAQ. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 7 Reality Expansion Pack Cessna C172SP Skyhawk Automatic Update of the Software Automatic Update of the Software The Reality Expansion Pack support the automatic updates via the SkunkCrafts Updater plugin. In order to activate the automatic updates you shall: 1. Install the SkunCrafts Updater plugin as stated in its user manual 2. Inside REP’s zip, inside the “into-aircraft-main-folder”, you find a file called skun- crafts_updater.cfg. Copy such file into the C172SP Skyhawk main folder. NOTE • Always install REP’s skunkcrafts_updater.cfg file even when the airplane already comes with its own cfg. REP updates will automatically install the base airplane updates whenever available. • Load a non-REP airplane - such as the default Cessna 172 - before applying the automatic updates. Applying the updates on the aircraft that is currently loaded in the sim will not guarantee a successful update. • After updating the plane, close and relaunch X-Plane to make sure that all the files are unloaded and updated correctly. Manual Update of the software NOTE: It is not necessary to remove the older REP files. The software will take care of the update procedure. 1. Copy the “REP” folder contained in this package inside the “plugins” folder of the C172SP Skyhawk, overwriting the existing one. 2. Run X-Plane and load the C172SP Skyhawk. 3. Reload the aircraft when the automatic update is finished (click on Developer > Reload the Current Aircraft and Art). Remove the software To remove the software follow this procedure: 1. In the menu bar click on “Plugins” 2. Click on “SimCoders.com - REP” and choose “Disable Package” 3. Click “Ok” in the confirmation message 4. Reload the aircraft when the uninstallation procedure ends (click on Developer > Reload the Current Aircraft and Art). At the end of the uninstallation procedure, the original aircraft will be restored to its mint condi- tions. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 8 Reality Expansion Pack Cessna C172SP Skyhawk Recommended sound settings Recommended sound settings To better enjoy the Reality Expansion Pack on the C172SP Skyhawk, you should setup your sound settings like the following screenshot. Figure 1: Recommended sound settings For more information about the sounds, see the Sounds System chapter. Recommended control settings To have a better control over the airplane axis, you should setup your control sensitivity as follows. Figure 2: Recommended control settings ©SimCoders.com - For flight simulation only. Do not use for real flight Page 9 Reality Expansion Pack Cessna C172SP Skyhawk HARDWARE & SOFTWARE COMPATIBILITY Headshake If HeadShake v1.5 or higher is installed in your system, it will communicate with REP to improve the simulation realism. REP will drive HeadShake to simulate the vibrations of the real engine. Using this, you will be able to run the engine at the most comfortable RPMs by simply checking the vibrations it produces. In the same way, HeadShake will simulate the stall buffeting if the airplane in use shows that kind of behavior. Saitek Panels This software is compatible with Saitek Panels. In order to use them, you should install the XSaitekPanels free plugin from Sparker. This package already includes a INI configuration file for XSaitekPanels. Make sure you copy it inside the main folder of your C172SP Skyhawk. XPRealistic The Reality Expansion Pack can be used together with XPRealistic. You might need to disable XPRealistic’s wind, touchdown and brakes sound effects as REP already provides them. Differential and progressive brakes for X-Plane 11 The Reality Expansion Pack detects if Differential and progressive brakes for X-Plane 11 is installed in your system. If so, REP’s differential braking algorithm is disabled in favor of the custom differential brakes algorithm of the third party plugin. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 10 Reality Expansion Pack Cessna C172SP Skyhawk USER INTERFACE Lateral Menu When loaded, REP shows a lateral menu on the left-side of the screen. The menu consists of a set of small icons. By default, the menu partially hides itself until the mouse pointer gets near it. Figure 3: The menu is partially hidden by default Figure 4: The menu is shown when the mouse pointer gets closer to it You can choose to completely hide the menu when the mouse pointer leaves it. To do so, go to “Plugins -> SimCoders - REP -> Settings” menu and tick the “Show side menu on mouse over only” option. The lateral menu entries are available in the “Plugins -> SimCoders - REP” menu as well. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 11 Reality Expansion Pack Cessna C172SP Skyhawk Maintenance Report Maintenance Report This window is the primary way you have to check the status of your airplane and to fix all the systems that need the mechanic attention. The report is divided on more pages. Each page relates to a different group of systems. To act on a system, click on the entry in the “Action” column. To switch to the previous/next page click over the flipped page corners at the bottom of the report. Figure 5: The Maintenance Report window ©SimCoders.com - For flight simulation only. Do not use for real flight Page 12 Reality Expansion Pack Cessna C172SP Skyhawk Kneeboard Kneeboard The software come with a complete kneeboard window that contains the aircraft normal and emergency checklists together with the performance reference tables. Figure 6: The Kneeboard window ©SimCoders.com - For flight simulation only. Do not use for real flight Page 13 Reality Expansion Pack Cessna C172SP Skyhawk Kneeboard Show the kneeboard using the plugins menu The kneeboard window may be shown by clicking on the “Plugins” menu, then “SimCoders – REP” then “Show kneeboard”. Manage the kneeboard using the custom commands You can also use five different custom commands at which you can assign your custom keys or joystick buttons. The custom kneeboard commands defined by REP are the following: Command Description simcoders/rep/kneeboard/toggle Show or hide the kneeboard simcoders/rep/kneeboard/next_section Show the next kneeboard section simcoders/rep/kneeboard/prev_section Show the previous kneeboard section simcoders/rep/kneeboard/next_page Show the next kneeboard page simcoders/rep/kneeboard/prev_page Show the previous kneeboard page ©SimCoders.com - For flight simulation only. Do not use for real flight Page 14 Reality Expansion Pack Cessna C172SP Skyhawk Mass & Balance Mass & Balance The Reality Expansion Pack provides a Mass & Balance tool to precisely load the plane. While loading the plane, the goal is to keep the crosses inside the plot section delimited by the blue area, like shown in the screenshot below. Figure 7: The Mass & Balance window The blue area is the Center of Gravity Envelope. The mass is reported on the Y axis, the Center of Gravity Arm is reported on the X axis. If the cross is towards the left side of the plot, it means that the center of gravity will be towards the front of the airplane, that is, the airplane will be nose heavy. On the other hand, if the cross is on the right side of the plot, the airplane will be tail heavy. If you overload the airplane and the cross goes outside the blue envelope, the cross becomes red, indicating that the plane is not allowed to fly. Clicking on the “Apply” button, the selected passengers mass and fuel load will be applied to X-Plane. The unit of measure for the airplane mass and the C.G. arm can be changed by clicking the “Change Units” button. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 15 Reality Expansion Pack Cessna C172SP Skyhawk Walkaround Walkaround Click on the Walkaround icon in the lateral menu to enter walkaround mode. Click again on the same icon on close the walkaround window to return in the cockpit. During walkaround you can interact with some external systems of the aircraft using the walka- round window. Click the “Next” and “Prev” buttons at the bottom of the pre-flight checklists to move along the different pre-flight stations. Always do the walkaround and the pre-flight inspection before each flight. If you do not remove the tie-down and the chocks, you are not able to taxi and takeoff properly. If you do not remove the pitot cover, you will incur an airspeed indicator failure. Since version 3.4.5, it is possible to toggle all the static elements - such as the pitot cover and the tiedowns - using a single entry in the plugins menu or a keyboard command. Since version 3.3, the following keyboard/joystick commands are available to control the walka- round mode. Command Description simcoders/rep/walkaround/toggle Toggle the walkaround mode simcoders/rep/walkaround/next Next walkaround station simcoders/rep/walkaround/previous Previous walkaround station simcoders/rep/walkaround/action Execute current action simcoders/rep/walkaround/static_elements/toggle Static elements toggle Move the viewpoint while doing the walkaround in 2D It is possible to move the viewpoint during towing by using the default camera commands of X- Plane. To pan the view using the mouse, keep pressed the simcoders/rep/view/pan_with_mouse command. Walkaround in VR REP provides a series of hotspots around the airplane useful to check the plane during the pre-flight, post-flight and lights-check checklists. Start the walkaround using the simcoders/rep/walkaround/toggle command and then move from station to station using your VR controller. Make sure you bring the walkaround window with you while moving from a station to another. Towing REP comes with a complete towing simulation. To activate it, click on the towing icon in the lateral menu. Click the icon again to exit from the towing mode. The towing features a 3D towing bar that will help you driving the airplane on the tarmac. To move the airplane, push or pull the pitch axis of your joystick. Use the roll axis to turn. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 16 Reality Expansion Pack Cessna C172SP Skyhawk Engine Autostart Since REP simulate the force applied by a single man placed in front of the airplane, you may not be able to tow the airplane on the grass, just like in real life. You won’t be able to tow the airplane if it’s tied-down or if chocks/brakes are applied. Move the viewpoint while towing in 2D It is possible to move the viewpoint during towing by using the default camera commands of X- Plane. To pan the view using the mouse, keep pressed the simcoders/rep/view/pan_with_mouse command. Towing in VR REP provides an hotspot in front of the airplane (tricycle gear) or close to the tail (taildragger) useful to drive the airplane in VR mode. Toggle the towing mode using the simcoders/rep/towing/toggle command and then move the airplane using your joystick as described above. Engine Autostart The Reality Expansion Pack provides you a way to automatically start the engines. Click on the engine autostart icon in the side menu and wait until the startup procedure is completed. During the automatic start, REP shows a series of tips that describe the action being done. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 17 Reality Expansion Pack Cessna C172SP Skyhawk Settings Window Settings Window The settings windows is shown by clicking over the “Plugins -> SimCoders - REP -> Settings” menu. Enable the plane damages When ticked, this option enable the plane damages. Show generic messages If ticked, REP will show generic messages related to systems status, when available. Show failure messages If ticked, REP will show a message in case of a system failure. The message will explain why the failure happened and what course of action should be taken. Show tip messages If ticked, REP will show a tip message. The message will give some hints related to the current pilot actions. Show side menu on mouse hover only When ticked, REP will completely hide the lateral menu when the mouse pointer leaves it. Save and restore the plane status between sessions If ticked, REP will save the airplane status when unloaded. When the same plane and livery are loaded again, the status will be restored. The status includes all the switches position, the fuel on-board, the loaded weights, the engine fluids quantity and quality and all the possible values that play part to the systems simulation. The engine temperatures - such CHT and Oil Temperature - are restored accordingly to the elapsed time since the values where stored. The status files are backed up before being overwritten. You find the backup in the output/preferences/REP folder. Save and restore the windows position between sessions If checked, the Maintenance Hangar and the Keyboard windows positions are saved and restored between sessions. Enable hypoxia effect When ticked, the default hypoxia effect is replaced by REP’s custom algorithm. See the Hypoxia chapter to get more information about the custom hypoxia effect. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 18 Reality Expansion Pack Cessna C172SP Skyhawk Settings Window Roll axis drives ground steering When ticked, the joystick roll axis will steer the nosewheel on the ground. Use US Customary When ticked, REP will use the US Customary units of measure (pounds and inches). Wind sound level Control cabin the wind sound setting the level between 0 (mute) and 100 (full). Main Monitor Index This option is visible only if X-Plane is running on two or more fullscreen monitors. Type the index of the monitor over which REP must show its menus and windows. The minimum number you can set here is 1. The maximum number is your monitors count. Each number addresses a different monitor. P-Factor ratio Select the ratio (0 to 100%) of simulated P-Factor Pitch Down on Stall ratio Select the ratio (0 to 100%) of pitch down moment during stall Show engine monitor When ticked, REP will show the engine’s parameters when the power is above 30% and the engine settings - such as Manifold Pressure, Prop RPM or Mixture - are changed by the user. Use Advanced Steering Enable this option to use REP’s advanced steering algorithm. You may need to disable this option if you have issues with steering with your hardware pedals. Use Advanced Braking Enable this option to smooth the brakes and to enable the automatic differential brakes. Instead of applying the brakes all at once, they will go from 0 to 1 in two seconds, smoothing the braking action. Automatic differential braking is applied if brakes are pressed while steering. Disable this option if you use hardware toepedals. Use VR Walkaround and Towing When enabled, this option allows to use the new VR walkaround and towing modes. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 19 Reality Expansion Pack Cessna C172SP Skyhawk Settings Window Wait for real weather at startup When this options is enabled together with the simulator real weather, REP waits for the real weather to be correctly loaded before loading the plane status and update the systems’ tempera- tures. This option is not needed in X-Plane 12 therefore it is not shown. In flight tips vertical offset Set the vertical offset of the in-flight window. By default, the tips are shown at the top of the main screen. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 20 Reality Expansion Pack Cessna C172SP Skyhawk Economy System The Reality Expansion Pack (REP) introduces a custom Economy System that rewards you for your flight time and allows you to manage maintenance and repair costs for your aircraft. Modes of Operation The Economy System offers three modes of operation: • Standalone: Maintains a local bank account and maintenance records on your PC, shared among all your REP aircraft. Rewards are provided for flight time and landing skills. • FSEconomy: Connects to your FSEconomy account, deducting maintenance costs directly from your FSEconomy balance. Flight time rewards are excluded, as they are handled by FSEconomy. • X-CPL-Pilot: Integrates with your X-CPL-Pilot account to deduct maintenance costs. Flight rewards are not included, as they are managed by X-CPL-Pilot. Enabling the Economy System To activate the Economy System: 1. Open the Maintenance Report and navigate to the last page. 2. Click the “Enable” button for your chosen system. FSEconomy: Aircraft Key Setup If enabling the FSEconomy mode, an Aircraft Key is required. This key is a 15-character identifier unique to your aircraft within the FSEconomy environment. Steps to find your Aircraft Key: 1. Log in to the FSEconomy website. 2. Select the “Aircraft” button from the main menu. 3. Locate your aircraft in the list and click “Edit” under the “Action” column. 4. Generate or copy the Aircraft Key from the lower-left corner of the page. When enabled, the Economy System saves your aircraft state to a separate file. This allows for two independent aircraft states—one for when the Economy System is active and another for when it is disabled. Switching between modes will load the corresponding state. Your bank account is shared across all REP aircraft, enabling you to use funds earned with one aircraft to repair or maintain another. How It Works Once activated, the Economy System displays your bank account balance and transaction history (expenses for maintenance and fuel, and income from flights) in the Maintenance Report. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 21 Reality Expansion Pack Cessna C172SP Skyhawk How It Works Figure 8: Enable the Economy System ©SimCoders.com - For flight simulation only. Do not use for real flight Page 22 Reality Expansion Pack Cessna C172SP Skyhawk How It Works Figure 9: Economy System Overview ©SimCoders.com - For flight simulation only. Do not use for real flight Page 23 Reality Expansion Pack Cessna C172SP Skyhawk How It Works Maintenance and Repairs 1. Navigate to the Maintenance Report to view available maintenance tasks. 2. For each task, the table lists the cost and required work time. Figure 10: Maintenance Report Example 3. Add tasks to your Quotation by clicking the “Action” cell for each item. The cell will update to show “In Quote”. 4. To remove a task, click the “Action” cell again. Once you’ve selected the necessary actions, view your Quotation by clicking “View Quotation” or ©SimCoders.com - For flight simulation only. Do not use for real flight Page 24 Reality Expansion Pack Cessna C172SP Skyhawk How It Works scrolling to the last page of the Maintenance Report. Figure 11: Quotation Example The Quotation provides two pricing options: • Normal Price: Maintenance is completed one task at a time in real-time, even if multiple aircraft require attention. The mechanic will continue working even if the simulator is closed. • Quick Fix Price: All tasks are completed instantly at a higher cost. Accept a price to proceed with maintenance, or decline to cancel the Quotation. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 25 Reality Expansion Pack Cessna C172SP Skyhawk Buying and Selling Fuel Buying and Selling Fuel Standalone Mode Only In the Weight and Balance window, you can add or remove fuel: • Adding Fuel: Deducts money from your account based on local prices. • Removing Fuel: Sells fuel back to the airport at a slightly lower rate than the purchase price. Fuel prices vary by region, airport, and time, but can be customized via the fuel_prices.cfg file in the Output/preferences/REP directory of X-Plane. Note that custom prices are only applied after the next scheduled recalculation (every 4–8 days). To check fuel prices at a specific airport, use the plugin menu: SimCoders - REP -> Check fuel price at an airport. Earning Money: Rewards Standalone Mode Only Earn money for flight time, with bonus rewards for smooth landings. The softer the landing, the higher the bonus. Flight earnings are logged in your bank account transaction history at the end of each flight. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 26 Reality Expansion Pack Cessna C172SP Skyhawk VR Support REP supports the native VR implementation since version 3.4.0. VR support was further improved in version 4.5.0. How to open the plugin windows in VR REP provides a set of commands to control the plugin windows. • simcoders/rep/vr/open_menu: open REP’s main menu • simcoders/rep/fuelmenu/show: show the fuel menu when using the economy system • simcoders/rep/maintenancereport/show: show the maintenance report • simcoders/rep/settingsmenu/show: show the settings menu • simcoders/rep/weightandbalance/show: show the weight and balance (if supported) • simcoders/rep/towing/toggle: toggle the tow mode • simcoders/rep/kneeboard/toggle: toggle the kneeboard • simcoders/rep/walkaround/toggle: toggle the walkaround mode For more information about how to assign the commands above please read X-Plane’s user guide about assigning commands to buttons. NOTE Make sure you loaded a REP airplane before looking for the command in X-Plane’s settings window. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 27 Reality Expansion Pack Cessna C172SP Skyhawk Figure 12: The Tech Report shown in VR mode SOUNDS SYSTEM The Reality Expansion Pack features a custom sound system that provides immersive 3D sounds throughout the entire flight experience. A custom sounds system has been preferred over the usage of FMOD for the following reasons: • FMOD could be rather cumbersome from the developer’s point of view, requiring more time to produce new features • A custom engine is more flexible and can be expanded in no time providing new features • A custom engine is more efficient as it’s taylored to our needs REP’s sounds system provides advanced sounds such: • Engine ignition • Engine pings • Engine exhaust effects • Fuel pumps • Electric Gyros • Avionics effects • Dynamic touch down • Dynamic ground roll • Dynamic wind ©SimCoders.com - For flight simulation only. Do not use for real flight Page 28 Reality Expansion Pack Cessna C172SP Skyhawk PERSISTENT AIRCRAFT AND COMPONENTS WEARING Reality Expansion Pack – Wear & Tear System The Reality Expansion Pack features a comprehensive wear and tear system that applies to the entire aircraft. Every component experiences wear over time, and after extended use, it may develop issues or even fail completely. The condition of each part is continuously saved and updated, even when the simulator is not running. This applies to key aircraft systems such as engine components, the electrical system, airframe, and landing gear. Each component is affected by both time and user handling in different ways. For example, if you push the engine beyond its operational limits, it will degrade faster, leading to startup difficulties, combustion irregularities, and a noticeable loss of power. If neglected, it will eventually fail. The precision of cockpit instruments also diminishes over time—a newly calibrated gauge will be far more accurate than one that has been in service for years. Loading a Worn-Out Aircraft With REP, you have the option to start with an aircraft that already has a wear history. To do so, navigate to: Plugins  SimCoders.com - REP  Wear out to > and select one of the following presets: • Brand New: A factory-fresh aircraft, just off the production line. The engine and all onboard systems are in perfect condition. • Privately Owned (New): A well-maintained aircraft with low flight hours. Some usage is logged, but no issues are present. • Privately Owned (Old): A privately owned aircraft with significant flight hours. While well cared for, wear is visible on various components. • Flying Club: A well-used aircraft that has passed through many hands—some careful, others less so. Expect worn-out systems and degraded instrument performance. Checking Component Status To inspect, repair, or calibrate individual components, refer to the Maintenance Report. This report provides a detailed overview of all aircraft components that can be checked and serviced by a mechanic. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 29 Reality Expansion Pack Cessna C172SP Skyhawk Hobbs Time and Tach Time Hobbs Time and Tach Time Within the Maintenance Report, you will also find: • Hobbs Time – The total airframe time. • Tach Time – The total engine time. After flying a new aircraft for a while, you may notice a slight difference between these two values due to how they are calculated. Hobbs Time In most aircraft, the Hobbs meter is triggered by an oil pressure switch, meaning it starts counting when the engine is running and stops when the engine shuts down. It measures time in real-world clock intervals, ticking off 0.1 hours every 6 minutes, regardless of whether the aircraft is idling or in cruise flight. Tach Time Unlike Hobbs time, the tachometer clock does not track actual time; instead, it records engine revolutions. • When the engine runs at cruise RPM, the tachometer records time at the same rate as the Hobbs meter. • If the engine operates at a lower RPM (e.g., idling on the ramp), the tach time accumulates more slowly than Hobbs time. • This means that the faster you run the engine, the faster the tach time increases. By understanding and managing wear and tear, you can extend the life of your aircraft’s compo- nents and maintain peak performance throughout your flights. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 30 Reality Expansion Pack Cessna C172SP Skyhawk SYSTEMS DESCRIPTION Within the Reality Expansion Pack, each system has its own life-cycle and can be damanged depending on many factors, including the pilot’s behavior. All systems can be fixed individually using the Maintenance Report or all at once using the simcoders/rep/systems/fix_all command. The following is a brief description of each system onboard. Powerplant The C172SP Skyhawk is powered by a four-cylinders Lycoming IO-360-L2A normally aspirated, direct-drive, air-cooled, horizontally-opposed, fuel-injected engine with 360 cubic inches displace- ment. This engine outputs a maximum power of 180HP at 29 inches Hg and 2700RPM with no time limitations. Engine Overview The Reality Expansion Pack totally replaces the engine simulated by X-Plane with custom algo- rithms to the point that not a single bit of the old engine model is left in the sim. Everything in the engine is made from scratch to provide the maximum realism. This includes the combustion model to which all the other models - such as the Power Output, the Cylinders Head Temperature or the Oil Pressure - depend. The engine now breathes air, mix it with fuel and produce a realistic combustion. Some of the features include: • Correct animations and sounds: the cylinders compression is simulated to the deepest level, enhancing the propeller movements at very low RPMs and at startup and shutdown • Correct power output: the engine outputs the correct power at every RPM setting. • Correct fuel flow: reaching the correct power output allows X-Plane to provide the right fuel flow at every phase of the flight, right down to the numbers. • Realistic startup procedure: The engine needs to be pre-injected using the electrical fuel pump (see the operating tips) • Realistic engine issues: – The oil type, quality and quantity affects the engine behavior. – The spark plugs may foul because of carbon deposits – Leaning the mixture at the wrong time or in the wrong way may cause damages to the engine – Engine preheater and winterization kit: the engine may be preheated in winter using the provided electric engine heater. If the engine is not heated correctly, it won’t start or may be damaged after start. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 31 Reality Expansion Pack Cessna C172SP Skyhawk Fuel System Starter The Reality Expansion Pack replaces the default starter with a custom one. In the “Engine Status” page of the Maintenance Report you can: • Check the starter status • Replace a faulty starter with a new one CAUTION The starter will overheat and then damage if engaged for too long. Make sure to engage the starter for no more than 30 seconds. Let it cool down between failed starts. Induction System The Reality Expansion Pack (REP) implements a custom Manifold Absolute Pressure (MAP) algorithm, replacing X-Plane’s default system for enhanced accuracy and realism. The C172SP Skyhawk engine is normally aspirated. That is, the maximum air pressure that affects the engine is the outside atmospheric pressure. During climb, as the atmospheric pressure gets lower the maximum manifold pressure gets lower as well. Fuel System Fuel Pump The fuel system is provided with a electrical fuel pump that can be used to prime the engine. The fuel pump should not be used in flight unless required by the checklists. In the “Engine Status” page of the Maintenance Report you can: • Check the fuel pump status • Repair the pump in case of failure Fuel Injection System The Reality Expansion Pack fully recreates the Bendix RSA Precision Flow Fuel Injection System that powers the real world C172SP Skyhawk. This fuel injection system is provided with a Venturi that senses the amount of air that goes to the engine and so regulates the fuel flow accordingly. With altitude, the air density reduces more than the fuel density. So this metering system still requires the pilot to lean the mixture at high-density altitude. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 32 Reality Expansion Pack Cessna C172SP Skyhawk Fuel System Tuned Fuel Injectors The cylinders and air induction positions lead to a different amount of air being sucked in each cylinder for a given throttle position. That is, more air goes into the #1 and #2 cylinders than in #3 and #4. In a 6 cylinders engine, the spread between #1 and #6 is quite wide. Factory fuel injectors deliver the same amount of fuel to each cylinder. That is, cylinder #1 runs leaner than #2. The richer cylinder is usually #5 or #6. This spread affects the engine performance, especially when running lean of peak with only one EGT probe. Usually, leaning LOP for the hottest cylinder (#5 or #6 in a 6 cylinders, #3 or #4 in a 4 cylinders) means being widely LOP for the #1 cylinder, thus experiencing a loss of power together with a rough running engine. In the Maintenance Report, it is possible to replace the factory injectors with tuned ones, made to properly release the correct amount of fuel based on the cylinder number. Tuned injectors allow for: • Smoother LOP operations • Fewer vibrations • Lower fuel burn of about 1 GPH General Aviation Modifications, Inc. is a real world manufacturer of tuned fuel injectors for many different type of fuel injected engines. For more information, please visit GAMI’s website. Spark Plugs Each cylinder is provided with two spark plugs, one connected to the left magneto and the other connected to the right magneto. Carbon deposits form on the spark plugs pointers if the engine is run at low RPMs with rich mixture. That is, the spark plugs foul. To avoid fouling, always keep at least 1000RPM and aggressively lean the mixture when on ground. A big drop in RPM during the magnetos check is a sign of a fouled spark plug. To clean the spark plugs, set a high power setting and aggressively lean the mixture. Run the engine with this setting for about 20 seconds then recheck the magnetos. In the “Engine Status” page of the Maintenance Report you can: • Check the spark plugs status • Manually clean the spark plugs • Change the default spark plugs with the “fine wire” type. Fine wire spark plugs are less prone to fouling but not immune to it. Exhaust System The main goal of the Exhaust System is to emptying each cylinder of spent exhaust gases. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 33 Reality Expansion Pack Cessna C172SP Skyhawk Fuel System Factory exhaust usually aren’t length-tuned. That is, the length from the cylinder’s outlet valve to the end of the exhaust is not the same for each exhaust tube. This causes the formation of shock waves when the exhaust gases from one cylinder hit those from another cylinder. That is, the emptying effect is lower than desired. Using the Maintenance Report it is possible to replace the factory exhaust with tuned ones. Tuned exhaust allow for: • ~10% more power • Fewer vibrations • Lower fuel burn • Lower CHTs Real world modifications for the C172SP Skyhawk are available at Powerflow System’s. More information on their website. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 34 Reality Expansion Pack Cessna C172SP Skyhawk Fuel System Oil System The oil system has the main role to lubricate the engine thus reducing the friction between engine components. It also helps reduce the engine temperature. The oil system is made by: • An oil tank • A screening filter • A set of oil lines that go to the cylinders • An engine-driven scavenging pump that moves the oil from the bottom of the oil sump - below the engine - back to the oil tank • An oil radiator. The Reality Expansion Pack simulates all these components as well as the oil fluid properties. The pilot must check the quantity and quality of the oil before each flight. This should be done during the walkaround. In the “Engine Status” page of the Maintenance Report you can: • Check the type of oil fluid in use • Check the quantity of oil fluid in the oil tank • Change the oil fluid type • Check the status of the oil filter • Change the oil filter with a new one • Check the oil pump status • Overhaul the oil pump A higher grade oil - such SAE50 - is thicker than a lower grade - such SAE30 - and meant to be used in hotter climates. The following article is a guide to choose the correct oil grade depending on the type of flight op- erations in progress: https://www.simcoders.com/2016/04/18/how-to-choose-right-oil-engine If the oil is not changed regularly (about every 40 hours) it may get dirty and have a lower lubricant action. That is, the engine will run hotter and wear more than before. NOTE The oil pressure may get closer to its maximum value when a cold engine is first started. This is normal and do not cause any harm to the engine as long as the oil pressure gets lower during engine warmup. Warmup the engine to ensure the correct oil temperature and pressure before applying full power for takeoff. CAUTION ©SimCoders.com - For flight simulation only. Do not use for real flight Page 35 Reality Expansion Pack Cessna C172SP Skyhawk Fuel System Using a higher grade oil in cold climates could lead to high oil pressure, thus damaging the oil system components. The Red Box When the IO-360 was firstly designed, there were many misconceptions about how to actually manage the engine throughout the normal operating range. The most common tip was to run 100°F ROP during high power operations, such climb, and 50°ROP during cruise, with the extra rule to almost never run LOP. When engine monitors started to be normal equipment on most high-end GA aircrafts, pilots finally had some data on which they could base they engine management decisions. It turned out that the 50/100°ROP rule is – generally speaking – not the best way to take care of your engine. In fact, the best ranges turned out to be the following: • Above 80% of power: richer than 200°F ROP or leaner than 60°F LOP • Between 75% and 80% of power: richer than 180°F ROP or leaner than 40°F LOP • Between 70% and 75% of power: richer than 125°F ROP or leaner than 25°F LOP • Between 65% and 70% of power: richer than 100°F ROP or leaner than peak EGT • Below 65% of power: no restrictions, lean as you like The ranges outside the one suggested above form what is called the ‘red box’. Running the engine in the red box is not really damaging it, but if you take care of it and stay away from the red box, you may extend the engine life and get an engine that run smoother. An extensive explanation of how and why you should keep the red box rule in mind is in this arti- cle: https://www.avweb.com/news/savvyaviator/savvy_aviator_59_egt_cht_and_leaning-198162- 1.html Engine Monitor The Reality Expansion Pack provides an engine monitor that shows the engine parameters such as the Fuel Flow, the EGT and the BHP whenever the engine control levers are moved. To activate the engine monitor, open the plugin settings and check the “Show Engine Monitor” option. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 36 Reality Expansion Pack Cessna C172SP Skyhawk Vacuum System Preheater To engage the engine preheater, open the Maintenance Report window and activate the electrical heater by going into the “Engine Tools” section. The electrical heater will warm up the engine (CHT) and the oil to a temperature that is suitable for startup is 30/60 minutes, depending on the outside air temperature. A “Fast Warmup” button is available in the Maintenance Report window. Once clicked, the engine will be warmed up instantly. Keeping the cowl plugs mounted will provide a faster and better warmup. To mount the cowl plugs, enter the walkaround mode and move to the engine checks. If operating in very cold climates, keep the engine preheater on until the walkaround is completed and startup the engine as soon as the preheater is turned off. The engine preheater state is kept between X-Plane sessions. If you turn on the heater and then close X-Plane, the engine will be warmed up even when the simulator is not running. Engine Startup Tips • Before starting the engine, always apply full mixture and 1 inch throttle and then switch the electrical fuel pump on for a variable time between half (warm engine) and two seconds (cold engine). After this pre-injection phase, close the throttle, set the mixture full lean and proceed with the normal engine startup. • If the engine “pops” during the startup it means it’s flooded. Just close the mixture and set the throttle full open, then engage the starter. The engine should start in a few revolutions. If not, repeat the normal startup procedure. Vacuum System The engine is provided with a vacuum pump used to power up the vacuum gyros. A vacuum pump is connected to the engine via a quick-break shaft. In case of vacuum pump seizure, the shaft breaks and no harm is done to the engine. Use the vacuum gauge to check that the vacuum pump is properly working. A normal vacuum reading is about 4 to 6 when the engine is running at cruise power. In the “Engine Status” page of the Maintenance Report you can: • Check the vacuum pump status • Repair a broken vacuum pump ©SimCoders.com - For flight simulation only. Do not use for real flight Page 37 Reality Expansion Pack Cessna C172SP Skyhawk Electrical Systems & Avionics Electrical Systems & Avionics The airplane is equipped with a 28-volt, direct-current electrical system. The system uses a battery as the source of electrical energy. An 60-amp alternator maintains its state of charge. Battery The default battery is replaced with a battery that keeps its charge between sim sessions and discharges at a realistic rate. The battery state is updated even when the simulator is not running. This means that if you leave your battery on, it will discharge even if X-Plane is closed. In the “Electrical System & Avionics Status” page of the Maintenance Report you can: • Check the battery charge • Recharge the battery • Disconnect the battery poles from the electrical system If you plan not to fly the airplane for a while, you should disconnect the battery via the Maintenance Window. This will avoid self-discharging and extend the battery life during storage. Alternator The alternator switch position is saved through all X-Plane sessions. Make sure it is switched in the correct position according to the checklists throughout the entire flight. The alternator switch operation may affect the avionics. Check the Avionics paragraph below to get more information. Lights The light switch positions are saved through all X-Plane sessions. If the airplane is not provided with strobe lights fmod sounds, the Reality Expansion Pack adds the strobe lights sounds when the lights are switched on. Electrical Gyros The Reality Expansion Pack replaces the default X-Plane electrical gyros with custom ones with a more realistic spin up/down dynamics. The typical spin up/down sounds are reproduced when the battery switch is turned in the “On” position. The instruments provided with an electrical gyro and therefore depending on the electrical supply are the turn/slip indicator, the standby attitude indicator and the HSI, if they are provided. Radio Stack The radio components save their own state - such as frequencies and knobs position - during X-Plane sessions. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 38 Reality Expansion Pack Cessna C172SP Skyhawk Landing Gear In the “Electrical System & Avionics Status” page of the Maintenance Report you can: • Check the status of each radio • Fix a faulty radio CAUTION Never turn on or off the engine or the alternator when the avionics switch is in the “On” position. Doing so may trigger a overvoltage spike that could damage one or more avionics components. The newer avionics such as the Garmin GNS430/530 are better protected from overloads but they are not totally immune from them. Landing Gear The airplane is equipped with a tricycle fixed landing gear. The Reality Expansion Pack introduces the following changes to the default landing gear: • Improved ground roll physics: REP corrects the default behavior of X-Plane on ground in cross wind conditions, when the airplane tended to steer against the wind. • Custom touchdown sounds: The touchdown sounds tone and volume are related to the touchdown speed. A harder touchdown will produce different sounds than a soft landing. • Brakes sounds: Actuating the brakes produces the typical whining sound. Also the classic squeaking sounds are reproduced when the brakes are not in perfect shape. In the “Landing Gear & Brakes Status” page of the Maintenance Report you can: • Check the status of the landing gear struts • Fix a faulty strut Spring loaded nose wheel The nose wheel will freely turn right or left. The airplane direction on ground should be maintained using the brakes as well as the steering pedals. Tires The Reality Expansion Pack simulates the tire status and failure based on the landings done in the past. A flat tire can cause the plane to yaw during the landing run or get it stuck on the ground before taxi. In the “Landing Gear & Brakes Status” page of the Maintenance Report you can: • Check the status of each tire • Fix a faulty tire ©SimCoders.com - For flight simulation only. Do not use for real flight Page 39 Reality Expansion Pack Cessna C172SP Skyhawk Landing Gear Brakes The C172SP Skyhawk has a single-disc, hydraulically-actuated brake on each main landing gear wheel. Each brake is hydraulically connected to a cylinder attached to each of the pilot’s rudder pedals. The brakes are operated by applying pressure to the top of the rudder pedals, which are intercon- nected. When the airplane is parked the brakes may be activated using the parking brake switch located under the pilot’s yoke. To avoid brake failures, keep the brake system properly maintained and minimize brake usage during taxi operations and landings. Do not apply the brakes for a long time. If the runway is long, let the plane slow down by itself. In the “Landing Gear & Brakes Status” page of the Maintenance Report you can: • Check the status of the braking system • Fix a faulty brake ©SimCoders.com - For flight simulation only. Do not use for real flight Page 40 Reality Expansion Pack Cessna C172SP Skyhawk HUMAN FACTOR Hypoxia Hypoxia is a condition in which the body or a region of the body is deprived of adequate oxygen supply at the tissue level. As altitude is gained, the partial pressure of Oxygen gets lower and lower to the point that the human body is unable to absorb enough quantity of it to sustain life. The symptoms of hypoxia are: • Apparent personality change • Impaired judgement • Headache • Tingling • Increased rate of breathing • Muscular impairment • Memory impairment • Visual sensory loss • Tunnel vision • Impairment of consciousness • Cyanosis • Unconsciousness • Death The Reality Expansion Pack simulates some of the symptoms above, such as the tunnel vision, the increased rate of breathing and the muscular impairment. TUC & EPT Time of Useful Consciousness (TUC) is the time available for the development of hypoxia and the pilot to do something about it. It is not the time to unconsciousness but the short time from a reduction in adeguate oxygen until a specific degree of impairment, generally taken to be the point when the individual can no longer take steps to help him/herself. Effective Performance Time (EPT) is always within and shorter than TUC. Its quantification however depends on the individual. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 41 Reality Expansion Pack Cessna C172SP Skyhawk Hypoxia The following is a table that represent the EPT simulated by REP. Altitude (ft) EPT 10000 Few hours 15000 40 minutes 20000 10 minutes 30000 30 seconds 40000 15 seconds 45000 1-2 seconds Figure 13: Hypoxia effect ©SimCoders.com - For flight simulation only. Do not use for real flight Page 42 Reality Expansion Pack Cessna C172SP Skyhawk HOME COCKPITS/CUSTOM DATAREFS In order to work properly, REP uses a set of custom datarefs instead of default X-Plane ones. Here you find a list of datarefs that you can use for your home cockpit. This list includes all REP’s datarefs. Some of them might not be present on some REP, depending on the systems depicted by the package. Dataref: simcoders/rep/stallwarning/on • Type: int • Writable: No • Contents: 0 = off, 1 = on Dataref: simcoders/rep/stallwarning/level • Type: int • Writable: No • Contents: 1 = low, 2 = high Dataref: simcoders/rep/cockpit2/gauges/indicators/vacuum • Type: float • Writable: No • Contents: Vacuum gauge value Dataref: simcoders/rep/cockpit2/gauges/indicators/attitude_indicator_0_pitch • Type: float • Writable: No • Contents: Main attitude indicator pitch Dataref: simcoders/rep/cockpit2/gauges/indicators/attitude_indicator_0_roll • Type: float • Writable: No • Contents: Main attitude indicator roll Dataref: simcoders/rep/cockpit2/gauges/indicators/attitude_indicator_1_pitch • Type: float • Writable: No ©SimCoders.com - For flight simulation only. Do not use for real flight Page 43 Reality Expansion Pack Cessna C172SP Skyhawk • Contents: Stdby attitude indicator pitch Dataref: simcoders/rep/cockpit2/gauges/indicators/attitude_indicator_1_roll • Type: float • Writable: No • Contents: Stdby attitude indicator roll Dataref: simcoders/rep/cockpit2/gauges/indicators/airspeed_kts_pilot • Type: float • Writable: No • Contents: Pilot airspeed Dataref: simcoders/rep/cockpit2/gauges/indicators/airspeed_kts_copilot • Type: float • Writable: No • Contents: Copilot airspeed Dataref: simcoders/rep/cockpit2/gauges/indicators/altitude_ft_pilot • Type: float • Writable: No • Contents: Pilot altitude Dataref: simcoders/rep/cockpit2/gauges/indicators/altitude_ft_copilot • Type: float • Writable: No • Contents: Copilot altitude Dataref: simcoders/rep/cockpit2/gauges/indicators/vvi_fpm_pilot • Type: float • Writable: No • Contents: Pilot VSI Dataref: simcoders/rep/cockpit2/gauges/indicators/vvi_fpm_copilot • Type: float ©SimCoders.com - For flight simulation only. Do not use for real flight Page 44 Reality Expansion Pack Cessna C172SP Skyhawk • Writable: No • Contents: Copilot VSI Dataref: simcoders/rep/cockpit2/switches/avionics_power_on • Type: int • Writable: Yes • Contents: Avionics switch Dataref: simcoders/rep/indicators/fuel/fuel_quantity_0 • Type: float • Writable: No • Contents: Fuel kg in tank 0 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_ratio_0 • Type: float (ratio 0..1) • Writable: No • Contents: Fuel ratio in tank 0 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_1 • Type: float • Writable: No • Contents: Fuel kg in tank 1 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_ratio_1 • Type: float (ratio 0..1) • Writable: No • Contents: Fuel ratio in tank 1 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_2 • Type: float • Writable: No • Contents: Fuel kg in tank 2 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_ratio_2 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 45 Reality Expansion Pack Cessna C172SP Skyhawk • Type: float (ratio 0..1) • Writable: No • Contents: Fuel ratio in tank 2 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_3 • Type: float • Writable: No • Contents: Fuel kg in tank 3 Dataref: simcoders/rep/indicators/fuel/fuel_quantity_ratio_3 • Type: float (ratio 0..1) • Writable: No • Contents: Fuel ratio in tank 3 Dataref: simcoders/rep/engine/fuelline/electrical_feed_0/switch_on • Type: int • Writable: Yes • Contents: L tip pump switch (1 = on) Dataref: simcoders/rep/engine/fuelline/electrical_feed_1/switch_on • Type: int • Writable: Yes • Contents: R tip pump switch (1 = on) Dataref: simcoders/rep/indicators/fuel/fuel_flow_0 • Type: float • Writable: No • Contents: L FF indicator Dataref: simcoders/rep/indicators/fuel/fuel_flow_1 • Type: float • Writable: No • Contents: R FF indicator Dataref: simcoders/rep/cockpit2/gauges/indicators/engine_0_rpm ©SimCoders.com - For flight simulation only. Do not use for real flight Page 46 Reality Expansion Pack Cessna C172SP Skyhawk • Type: float • Writable: No • Contents: L RPM indicator Dataref: simcoders/rep/cockpit2/gauges/indicators/engine_1_rpm • Type: float • Writable: No • Contents: R RPM indicator Dataref: simcoders/rep/cockpit2/engine/actuators/fuel_pump_0 • Type: int • Writable: Yes • Contents: L pump (0 = off, 1 = on) Dataref: simcoders/rep/cockpit2/engine/actuators/fuel_pump_1 • Type: int • Writable: Yes • Contents: R pump (0 = off, 1 = on) Dataref: simcoders/rep/cockpit2/engine/actuators/low_fuel_pump_0 • Type: int • Writable: Yes • Contents: L LO speed pump Dataref: simcoders/rep/cockpit2/engine/actuators/low_fuel_pump_1 • Type: int • Writable: Yes • Contents: R LO speed pump Dataref: simcoders/rep/cockpit2/engine/actuators/high_fuel_pump_0 • Type: int • Writable: Yes • Contents: L HI speed pump Dataref: simcoders/rep/cockpit2/engine/actuators/high_fuel_pump_1 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 47 Reality Expansion Pack Cessna C172SP Skyhawk • Type: int • Writable: Yes • Contents: R HI speed pump Dataref: simcoders/rep/engine/electrical_fuelpump/switch_on_0 • Type: int • Writable: Yes • Contents: L pump (0 off, 1 LO, 2 HI) Dataref: simcoders/rep/engine/electrical_fuelpump/switch_on_1 • Type: int • Writable: Yes • Contents: R pump (0 off, 1 LO, 2 HI) Dataref: simcoders/rep/engine/cowl/handle_ratio_0 • Type: float (ratio 0..1) • Writable: Yes • Contents: L cowl flaps handle Dataref: simcoders/rep/engine/cowl/handle_ratio_1 • Type: float (ratio 0..1) • Writable: Yes • Contents: R cowl flaps handle Dataref: simcoders/rep/engine/oil/temp_f_0 • Type: float • Writable: No • Contents: L oil temp (F) Dataref: simcoders/rep/engine/oil/temp_f_1 • Type: float • Writable: No • Contents: R oil temp (F) Dataref: simcoders/rep/engine/oil/temp_c_0 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 48 Reality Expansion Pack Cessna C172SP Skyhawk • Type: float • Writable: No • Contents: L oil temp (C) Dataref: simcoders/rep/engine/oil/temp_c_1 • Type: float • Writable: No • Contents: R oil temp (C) Dataref: simcoders/rep/engine/oil/press_psi_0 • Type: float • Writable: No • Contents: L oil press (PSI) Dataref: simcoders/rep/engine/oil/press_psi_1 • Type: float • Writable: No • Contents: R oil press (PSI) ©SimCoders.com - For flight simulation only. Do not use for real flight Page 49 Reality Expansion Pack Cessna C172SP Skyhawk RESOURCES & HOW-TOs SimCoders.com blog contains tons of resources that you will find very useful when using REP. Moreover, this is a list of How-Tos available. • How to lean the mixture • How to keep the spark plugs clean • How to choose the right oil for your engine • How to quickly startup the engine with REP • How to manage an emergency • How to calculate the required fuel for your flight SUPPORT & CONTACTS Before requesting support, please check our FAQs, where you’ll find answers to common ques- tions about installation issues and general usage. If you experience any technical problems with our software, feel free to contact us at support@ simcoders.com. To help us assist you efficiently, please provide a detailed description of the issue and include your X-Plane Log.txt file. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 50 Reality Expansion Pack Cessna C172SP Skyhawk VERSION CHANGELOG V4.8.11 No change for this aircraft V4.8.10 No change for this aircraft V4.8.9 1. Fix: the flaps motor sound was played during the walkaround flaps checks V4.8.8 No change for this aircraft V4.8.7 1. Improved pitch authority in XP12.1+ V4.8.6 No change for this aircraft V4.8.5 1. Fix: the cg was too aft in XP12.1 V4.8.4 1. Improvement: the N1 and N2 datarefs are updated for better cross-plugin compatibility 2. Fix: the Settings menu was not managed properly in VR V4.8.3 1. No changes for this airplane. V4.8.2 1. Fix: the system time was not always read correctly, therefore some features (like the time-based maintenance actions may not always work propely on some systems) V4.8.1 1. Fix: engine vibrations at startup were not visible anymore 2. Improvement: XP12.08 compatibility ©SimCoders.com - For flight simulation only. Do not use for real flight Page 51 Reality Expansion Pack Cessna C172SP Skyhawk V4.8.0 1. Support for time and ground speed multiplier 2. Improved side slip behavior in XP12.07 V4.7.14 1. No change for this airplane V4.7.13 1. No change for this airplane V4.7.12 V4.7.11 1. Improvement: the tie downs should better lock the plane to the ground V4.7.10 Fix: after loading a saved flight, the alternator may not work properly V4.7.9 1. Fix: in some engine configuration and bus loads, the alternator could not charge the battery completely V4.7.8 1. Fix: In X-Plane 12 the plugin forces could bump the plane at engines stop 2. Fix: memory leak in datarefs handling V4.7.7 V4.7.6 1. Fix: some sounds would not stop playing after plane crash 2. Fix: fuel totalizer fix in XP12 3. Fix: flaps pitch moment in XP12 V4.7.5 No changes for this airplane V4.7.4 No changes for this airplane ©SimCoders.com - For flight simulation only. Do not use for real flight Page 52 Reality Expansion Pack Cessna C172SP Skyhawk V4.7.3 1. Fix: Some components of the maintenance window were misplaced 2. Fix: Mass And Balance could not be applied correctly if the flight was started with the engines running V4.7.2 1. Fix: crash after replay V4.7.1 1. Fix: crash after pause V4.7.0 1. New: improved XP12 Flight Dynamics 2. Improvement: better alternator voltage simulation at low RPM 3. Improvement: support for Apple M* processors 4. Improvement: better compatibility of the Mass and Balance system with X-Plane 12 5. Improvement: it is now possible to vertically move the in-flight tips windows (no VR support for this feature at the moment) 6. Fix: missing library link if XP12 V4.6.6 1. Improved REP sound compatibility with internal X-Plane sound sliders V4.6.5-h2 1. Fixed broken plugin reset V4.6.5-h1 1. Fixed broken dataref V4.6.5 1. Improved spin behavior 2. Improved OpenAL errors log 3. Improved braking system compatibility with hardware toe pedals 4. Improved static elements compatibility with third-parties addons V4.6.4 1. No changes for this plane V4.6.3 1. No changes for this plane ©SimCoders.com - For flight simulation only. Do not use for real flight Page 53 Reality Expansion Pack Cessna C172SP Skyhawk V4.6.2 1. Improvement: MAP behavior at low RPM V4.6.1 V4.6.0 1. Change: “Smooth Brakes” and “Automatic Differential Brakes” options merged into the “Advanced Braking” option 2. New: REP now includes TXT format checklists too 3. Improvement: better LOP cut-out behavior in piston engines 4. Improvement: more realistic piston engine power response when running ROP 5. Improvement: more realistic manifold pressure behavior at high RPM 6. Improvement: running oversquare when LOP does not damage the piston engines 7. Improvement: REP waits for the real weather to load (if enabled) before updating the engine temperatures at startup 8. Improvement: improved hypoxia recover at low altitude 9. Fix: the manifold pressure was too low at idle 10. Fix: The REP update loop was not always executed correctly in certain configurations 11. Fix: The avionics is less prone to damage if the alternator is turned on/off with the avionics master on V4.5.12 1. Improved towing behavior 2. Added engine cooling down sounds (exhaust ticks) 3. No changes for this plane V4.5.10-h1 1. Fix: on Linux the plugin could crash the sim on startup because of a bad library link V4.5.10 1. A cancel window is shown before beginning the engine autostart procedure 2. Fix: the instrument wear could not save its state properly on some systems 3. Added the on and off commands for the fuel shutoff valve V4.5.9-h1 1. Improved the aileron tim-tab setting V4.5.9 1. Improved the FSEconomy implementation reliability 2. Fix: The avionics switch did not work properly anymore in VR 3. New: it is now possible to set the rudder trim tab in the maintenance window ©SimCoders.com - For flight simulation only. Do not use for real flight Page 54 Reality Expansion Pack Cessna C172SP Skyhawk 4. Fix: the G1000 configuration was not always correctly detected 5. Improved manifold pressure algorithm V4.5.8 1. Improved the hardware rudder pedals compatibility (it is now possible to disable the automatic differential braking) V4.5.7 1. Improved spin behavior with EFM V4.5.6 1. New: REP Economy System now supports X-CPL-Pilot 2. Fix: in the maintenance window, some text could oveflow from the borders 3. Improved the yaw moment behavior during turns 4. It is now possible to set a custom P-Factor and Pitch Down on Stall ratio 5. Fix: in some configurations, the installer may not properly modify the FMOD .snd files V4.5.5 1. The static elements are not visible anymore during replay 2. REP reports in X-Plane’s log when a damage/failure is taking place 3. The damage caused by running the engine in the redbox was not always calculated properly V4.5.3 1. Experimental Flight Model Support V4.5.2 V4.5.1 1. Fix: the oil pump failure message was missing V4.5.0 1. New: improved VR support in walkaround and towing modes 2. The magnetos are forced to “both” when starting the flight with engines running 3. The tiedowns and chocks are removed when starting the flight with engines running 4. Improved the fuel load rounding algorithm in the the Mass and Balance window 5. Fix: CTD when trying to connect to FSE 6. Fix: Typos in Maintenance Window 7. Fix: excessive oil comsuption when a cylinder is partially worn out V4.4.6 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 55 Reality Expansion Pack Cessna C172SP Skyhawk V4.4.5 1. The in-flight tips window now resize correctly in VR 2. Optimizations for XP11.50 3. Some sounds (very few) were played using the wrong equalizers resulting in too high or too low volume in relation to their position in the cockpit V4.4.4 1. Fix: XP10 crash on reload 2. Fix: CTD on plugin disable V4.4.3 1. New: dataref to control the wind volume: simcoders/rep/settings/wind_volume 2. Fix: memory leak V4.4.2 1. New: the standalone fuel market support USA airport codes 3 chars long 2. Fix: large windows did not fit the screen properly V4.4.1 V4.4.0 1. The simulator<->REP interface has been reworked to accommodate future improvements V4.3.6 1. Improved support for the G5 mod V4.3.5 1. FSEconomy: fix for HTTPS protocolo update V4.3.4 1. FSEconomy: fixed connection issue (HTTP 301 not followed properly) V4.3.3 1. Added support for the Garmin G5 mod by AFM V4.3.2 1. Fix: the com radio status was not properly restored 2. Fix: the autostart procedure didn’t set the fuel selector to both tanks ©SimCoders.com - For flight simulation only. Do not use for real flight Page 56 Reality Expansion Pack Cessna C172SP Skyhawk V4.3.1 1. Fix: improved P-Factor behavior 2. Fix: improved Flaps pitch moment 3. New option to show or hide the generic messages 4. Improved the Nav/Com radios status feedback in the maintenance window 5. Fix: the maintenance window could crash during the FSEconomy data update V4.3.0 1. Added the engine monitor 2. Improved the power curve in the 1500-2000 RPM range 3. The prop P-Factor has been improved 4. Improved the negative torque model 5. Fix: the elevator authority was excessive during the ground roll at very low speed 6. Fix: a change in XP11.35+ made the steering system unusable 7. Fix: improved the stall horn behavior on 11.35+ 8. Fix: improved the stall behavior on 11.40+ 9. Fix: improved the flaps dynamics on 11.40+ 10. Fix: improved fuel flow at startup with mixture full rich 11. Fix: the EGT indicator could report negative values 12. Message to warn that the Experimental Flight Model is not supported 13. Engine Monitor shows CHT and Oil Temperature 14. Fix: The preheater did not work properly 15. Fix: the Economy System status could be loaded only partially in some situations 16. Fix: the in-flight tips were not visible in VR. Thanks to sparker for helping debugging the issue. 17. Fix: walkaround CTD 18. Fix: message boxes did not support VR 19. Improved the engine negative torque model V4.2.3 1. Fix: solved some windows positioning issues 2. Fix: in XP10 REP did not recognize opening a window as a paused sim state 3. Fix: in the bush version, the EGT reference needle knob didn’t work 4. Fix: hobbs and tach times instruments in cockpit reported the same time 5. Improved startup behavior V4.2.2 1. Fix: Tach time was not shown correctly in the Tachometer 2. Fix: improved CHT algorithm with X-Plane 11.35 3. Fix: the kneeboard and maintenance windows did not save their position properly, therefore they were not shown correctly after being popped out 4. Fix: and X-Plane 11.35 bug prevented REP from reading the proper airspeed V4.2.1 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 57 Reality Expansion Pack Cessna C172SP Skyhawk 1. No changes for this aircraft V4.2.0 1. New: Simulation of Factory and Tuned fuel injectors effects 2. New: More realistic fuel metering system according to real world specifications 3. New: Simulation of Factory and Tuned exhaust effects 4. New: The status file are backed up before being overwrited 5. New: It is now possible to save the windows position between sessions 6. Improved manifold pressure behavior V4.1.8 1. New: it is now possible to set the wind sound volume in REP’s settings window V4.1.7 1. CTD fix V4.1.6 1. Minor Networking fix V4.1.5 1. Increased the debug log for the Economic System V4.1.4 1. No changes for this aircraft V4.1.3 1. Fix: The G1000 standby altimeter alway showed zero V4.1.2 1. Fix: altimeter, vsi and airspeed indicators did not use customs datarefs anymore after Laminar changed some obj files 2. Improved EGT curve V4.1.1 1. Improved flaps pitch down moment 2. Improved startup dynamics 3. Fix: an alternator did not save its status properly 4. Minor fixes ©SimCoders.com - For flight simulation only. Do not use for real flight Page 58 Reality Expansion Pack Cessna C172SP Skyhawk V4.1.0 1. New: FSEconomy integration with the maintenance system 2. Improved flight dynamics 3. Fix: X-Plane crashed in case of airplane crash 4. Fix: the systems’ damages where updated during replay as well 5. Fix: on XP10 some message windows were not shown properly 6. Fix: on multimonitor setups the in-flight tips were shown on the wrong monitor V4.0.4 1. Support for the Freeware Bush Pack by PropStrike Studio V4.0.3 1. Fix: the aircraft serial number is now more randomized 2. Fix: the weight and balance traded “0Lt” of fuel when changing the passengers’ masses 3. Fix: the initial status of the aircraft could not be reset properly 4. The spark plugs fouling in-flight tip is now easier to understand 5. Improved instruments behavior once weathered 6. The Tachometer Time is now only based on RPMs 7. Improved performance precision at altitude V4.0.2 1. New: it is now possible to deactivate the brakes smoothing 2. Fix: the tachometer showed the wrong value in the elapsed minutes (white) band 3. Fix: the fuel selector status was not restored properly 4. Fix: fixed a crash when closing a plugin’s window 5. Better gyros behavior V4.0.1 1. Fix: some mouse clicks were not captured properly in the Maintenance Report window 2. Fix: it was not possible to properly change the oil filter using the Maintenance Report window 3. More accurate engine dynamics and flight model on XP11.30 V4.0.0 1. New: Economic System 2. Improved multimonitor support V3.5.11 1. Vacuum Pump: the pump failure can be triggered using X-Plane failures menu 2. Attitude Indicator: the indicator failure can be triggered using X-Plane failures menu 3. Fix: changing livery or airport could not allow the aircraft to load its status properly 4. Fix: the flaps drag was too high in XP11.30 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 59 Reality Expansion Pack Cessna C172SP Skyhawk V3.5.10 1. Minor fixes V3.5.9 1. The Hypoxia warning is shown only when the TUC is lower than 20 minutes V3.5.8 1. Minor fixes V3.5.7 1. Fix: the state loading could load incomplete data on some systems 2. Minor fixes V3.5.6 1. Better fuel flow at startup 2. It’s now possible to paste the text in the licence box 3. Improved compatibility with X-Plane 11.30 4. Improved flaps pitch moment in X-Plane 11.26+ 5. Fix: saving a state file could have caused a crash on some specific system configurations 6. Fix: the static elements are better managed after leaving the replay mode 7. Fix: in some cases REP was unable to retrieve the correct system time V3.5.5 1. Fix: In some cases the plugin was unable to recognize if the sim was paused or not. This could lead to some major issues, such airplane crash after leaving replay mode 2. Fix: the prop governor did not react correctly when controlled using a joystick axis 3. Fix: minor fixes to the sound engine 4. Fix: in some cases the engine temps were not updated correctly if the airplane was loaded in flight, causing the oil pump to seize 5. Fix: in some cases the liveries status were not loaded properly when changing from a livery to another of the same aircraft 6. It is now possible to disable the advanced steering algorithm 7. Minor fixes V3.5.4 1. Fix: the vacuum system may have reported a false LOW VAC warning 2. Fix: the electric system may have reported a false LOW VOLTS warning 3. Minor Fixes ©SimCoders.com - For flight simulation only. Do not use for real flight Page 60 Reality Expansion Pack Cessna C172SP Skyhawk V3.5.3 1. Fix: fixed a compatibility issue with the sound engine 2. Fix: the parking brake lever was not properly set when parking brake was toggled using X-Plane default commands. V3.5.2 1. Fix: the new OpenAL equalizer showed some incompatibility with 3rd party plugins. This update will try to work around them and prevent crashes. A better fix will be provided in future releases. 2. Fix: the parking brake lever was not properly set when parking brake was toggled using X-Plane default commands. 3. Fix: the steering is now working properly in XP11.30+ 4. Fix: the installation files were not updated in v3.5.0 V3.5.1 1. Fix: the flaps handle did not move when the battery was off 2. Fix: the flaps motor sound was heard while checking the flaps during the walkaround 3. XP11.30 new hypoxia effect is now overridden and REP’s more precise hypoxia effect is used instead V3.5.0 1. New: It is now possible to load a worn out airplane. Checkout the Persistent Aircraft and Components Wearing chapter. 2. New: The cockpit instrumentation wears out with time and can be fixed using the Mainte- nance Report 3. New: Hobbs Time and Tach Time are now counted separately for the airframe and the engines 4. New: It is now possible to move the viewpoint while in walkaround or towing mode. VR not supported yet. See the Towing and Walkaround sections for more information. 5. The static elements, such chocks and tie-downs, are now managed during replay 6. The propeller governor dynamics at low RPMs are much improved 7. Improved starter algorithm 8. Fix: Corrected a typo in the checklists 9. Fix: the radios did not correctly save the stored frequencies 10. Fix: under certain conditions, the fuel pump sounds where not stopped with the pump itself 11. Fix: a bug prevented the cylinders to fail properly and to report their compressions in the Maintenance Report 12. Fix: the hypoxia message was shown when the hypoxia was disabled 13. Fix: the oil filter get less clogged when it’s past TBO 14. Fix: the autostart broke if the weight and balance configuration was changed while it was running 15. Fix: The Maintenance Report and the Kneeboard were not dimmed correctly at night V3.4.6 ©SimCoders.com - For flight simulation only. Do not use for real flight Page 61 Reality Expansion Pack Cessna C172SP Skyhawk 1. New: Automatic updates via SkunkCrafts Updater plugin 2. New: REP is now compatible with the Differential and progressive brakes for X-Plane 11 plugin 3. Improved documentation 4. Improved gyros spin-down behavior 5. The CHT and Oil Temperature now rise faster in warm weather conditions 6. Improved ground steering 7. Improved ground effect 8. Fix: corrected the stall warning sound during flare 9. Fix: the automatic start procedure selected the wrong fuel tank 10. Fix: failures and damages were triggered while in replay mode 11. Fix: the oil pressure needle was not visibile if the airplane was loaded with the engines running 12. Minor improvements V3.4.5 1. New: It is possible to manage the static elements from the plugins menu 2. New: Command to toggle the static elements 3. New: Command to fix all systems 4. New: REP correctly recognizes the engine failures triggered by X-Plane 5. Fix: The gyros where stuck when the engine was switched off 6. Fix: Improved the stall behavior in XP11.20+ 7. Fix: In the latest X-Plane versions the in-flight tip messages may have been not shown correctly 8. Fix: Some entries in the tech report were not clickable 9. Fix: Minor typos in kneeboard 10. The installer has been improved to work with all the airplane mods available over the Internet 11. More realistic hypoxia effect at lower altitudes 12. Improved documentation V3.4.4 1. Minor fixes V3.4.3 1. New: Improved engine torque algorithm 2. New: Improved sparkplugs fouling algorithm 3. New: Removed the mouse gestures to open the kneeboard 4. New: The checklists/mass and balance/towing mode/autostart are now accessible from the plugins menu as well as the lateral menu 5. New: a new command has been added to switch on the HI fuel pump 6. Improved multimonitor compatibility 7. Fix: oil pressure was sometimes too low 8. Minor fixes ©SimCoders.com - For flight simulation only. Do not use for real flight Page 62 Reality Expansion Pack Cessna C172SP Skyhawk V3.4.2 Internal test build – not released to the public V3.4.1 1. Fix: missing input chars in textbox 2. Fix: input on multimonitor setup was not working as expected 3. Minor fixes V3.4.0 1. New: Experimental VR Support 2. New: SDK 3.0 (Detachable) windows 3. Improved engine model 4. Minor fixes V3.3.1: 1. Fix: Too rich mixture at full power 2. Minor fixes V3.3.0 1. New: 100% custom engine model to replace the internal X-Plane piston engine 2. New: Engine monitor enables engine fine tuning during flight 3. New: Improved drag model 4. New: Improved walkround oil system check 5. New: Improved ground roll sounds 6. New: Improved ADI spoolup model 7. New: Walkaround keyboard commands 8. Minor fixes V3.2.1 1. Fix: Loading and unloading the plugin more times caused a crash 2. Fix: If the flight was started with engine running, the mixture was set to idle-cutoff 3. Minor fixes V3.2.0 1. New: 3D sounds 2. New: Advanced gyro wander 3. New: You can now check the pitot probe temperature during walkaround 4. New: Postflight walkaround 5. New: Lights check during walkaround 6. New: More information about the cylinders status 7. New: The hobbs hour are now saved in the airplane state file and restored the next session 8. Improved steering algorithm ©SimCoders.com - For flight simulation only. Do not use for real flight Page 63 Reality Expansion Pack Cessna C172SP Skyhawk 9. Better startup sounds 10. Fixed a bug that caused the cylinders to not being fixed correctly after an engine seizure 11. The landing gear failures are based on actual gravity acceleration. Now the landing on sloped strips are more realistic. 12. Fix a bug that may caused the engine to not fail when it should have 13. Minor fixes and improvements V3.1.1 1. New: The chocks and tie downs are checked before automatic start 2. New: The lateral menu can now be completely hidden (see the plugin settings window) 3. Alternator output set to 28V and battery to 24 4. Improved flooded engine message 5. Better compatibility with the “Start with engine running” setting 6. Fix: the label colors in some walkaround views were incorrect 7. Fix (XP11 only): the wind sound volume is controlled by the environment sounds volume 8. Minor fixes V3.1.0 1. New: Dynamic ground roll sounds 2. Minor fixes V3.0.0 1. New: reworked user interface and graphics 2. New: automatic startup procedure 3. Improved flight dynamics in X-Plane 11 4. Fix: some throttle quadrants did not work correctly with REP 5. Minor fixes and improvements V2.6.4 1. New: Flight dynamics improvements in both X-Plane 10 and 11 2. Fix: Minor fixes V2.6.3 1. Fix: The right toebrake did not couple properly with external rudder pedals 2. Fix: The oil system “Refill” button was not clickable V2.6.2 1. Fix: Minor fixes V2.6.1 1. Fix: Checklists typos 2. Fix: Improved fuel pump sounds ©SimCoders.com - For flight simulation only. Do not use for real flight Page 64 Reality Expansion Pack Cessna C172SP Skyhawk 3. Fix: The wheel brakes may be stuck after towing 4. Fix: Improved engines doppler and distance sounds 5. Fix: Damages disabled during replay 6. Fix: Improved the joystick compatibility with the new propeller governor V2.6.0 1. New: Custom propeller governor V2.5.1 1. Fix: Corrected the toe brakes algorithm V2.5.0 1. New: Improved torque effect 2. New: Improved CHT and Oil Temperature algorithm 3. New: Oil temperature tips 4. New: Improved hypoxia effect & algorithm 5. New: Fuel & Oil check in walkaround mode 6. Minor Fixes V2.4.0 1. New: Spark plugs dynamics: • The spark plugs get fouled when the engine runs at low RPMs • The default spark plugs can be replaced with the fine-wire ones 2. New: Hypoxia can now be disabled in the settings panel 3. New: The engine may be damaged by wrong ROP/LOP operations 4. Minor Fixes V2.3.0 1. New: Hypoxia simulation 2. New: Oil filter simulation: need to replace it at every oil change 3. New: Oil pump damage simulation 4. New: Fuel filter simulation: need to replace it after TBO 5. New: Vacuum pump casual failure simulation 6. New: More realistic engine priming dynamics 7. New: Improved W&B simulation during flight 8. Fix: Minor bug fixes V2.2.1 1. Fix: the installer did not apply some changes correctly ©SimCoders.com - For flight simulation only. Do not use for real flight Page 65 Reality Expansion Pack Cessna C172SP Skyhawk V2.2.0 1. New: Simplified installation 2. Fix: The analog and digital fuel flow gauges were not reporting the correct fuel flow under certain circumstances 3. Fix: Minor fixes V2.1.0 1. New: Engine pre-heating and winterization kit 2. New: The avionics settings are restored after reloading the airplane 3. New: Better compatibility with other plugins that manage the state of the airplane (such as X-Bookmark) 4. New: The sounds volume is controlled by the Carenado volume knob 5. New: The lateral menu is dimmed at night 6. Fix: More realistic ground physics 7. Fix: The oil system is now reporting the correct oil quantity 8. Fix: Minor fixes V2.0.3 1. Fix: The cowl flaps lever cannot be moved using the mouse wheel 2. Fix: The kneeboard images were cutted and not shown correctly V2.0.2 1. New: Improved cylinders physics • The CHT temperature is now provided by a custom algorithm 2. New: Improved oil system • The oil temperature is now provided by a custom algorithm • The oil temperature and pressure depends also on oil quantity an quality 3. New: Improved touchdown sounds 4. Minor Fixes V2.0.1 1. Fix: It was not possible to enter the walkaround mode if the “Cold and Dark” option was disabled 2. Fix: Typos in the towing tips 3. Fix: The Walkaround checklists were not correctly visible on smaller screens. V2.0.0 1. New: Custom interactive walkaround and pre-flight procedures. 2. New: Custom airplane towing system 3. New: More advanced engine physics (especially for engine startup) 4. New: More complex damages system for the avionics, the engine and the landing gear such as: • Oversquare operation of the engine is not always allowed ©SimCoders.com - For flight simulation only. Do not use for real flight Page 66 Reality Expansion Pack Cessna C172SP Skyhawk • The tire are damaged if the brakes are active on touchdown 5. New: More in-flight tips 6. New: Custom menu that provides an easy access to REP’s features 7. New: Stall buffeting effect (improved if HeadShake 1.5+ is installed) 8. Minor changes to the sounds system 9. Minor changes to the graphics system 10. Bug fixes V1.0.2 1. New: Correct steering and ground roll physics, especially in cross wind conditions. 2. New: The Weight & Balance tool now predicts the C.G. position at landing. 3. New: HeadShake and REP integration to better simulate the engine vibrations of the TSIO-520 (Headshake v1.5 or higher required). 4. Fix: Improved compatibility with Saitek products. 5. Fix: Minor fixes. V1.0.1 1. New: A tip is shown if the pilot is managing the plane’s system in the wrong manner. 2. New: Some failures (such as the avionic’s) are behaving in a more realistic way. 3. New: The parasite roll moment incorrectly reproduced by X-Plane is reduced. 4. New: The flooded engine behavior is now more realistic. If flooded, the engine may actually starts with closed mixture. 5. New: Engine manufacturer and model in the Hangar window. 6. New: Better oil color report in the Hangar window. 7. New: Added the “About” menu. 8. Fix: Sometimes, the joystick mixture axis was not correctly recognized. 9. Fix: Cranking a running engine does not reduce the engine’s RPM anymore. 10. Fix: Cranking a running engine does not cause an avionics failure anymore. 11. Fix: The pilot altimeter’s barometer was rendered incorrectly. 12. Fix: The propeller joystick axis was not working as expected. 13. Fix: The oil pressure was too high during flight. 14. Fix: Minor changes to improve performance and correct typos. V1.0.0 1. Initial Release ©SimCoders.com - For flight simulation only. Do not use for real flight Page 67 Reality Expansion Pack Cessna C172SP Skyhawk LICENCE End-User License Agreement for SimCoders.com Reality Expansion Pack This End-User License Agreement (EULA) is a legal agreement between you (either an individual or a single entity) and the mentioned author (SimCoders.com) of this Software for the software product identified above, which includes computer software and may include associated media, printed materials, and “online” or electronic documentation (“SOFTWARE PRODUCT”). By installing, copying, or otherwise using the SOFTWARE PRODUCT, you agree to be bounded by the terms of this EULA. If you do not agree to the terms of this EULA, do not install or use the SOFTWARE PRODUCT. SOFTWARE PRODUCT LICENSE The Reality Expansion Pack is being distributed as payware licenced software for personal, commercial use, non-profit organization, educational purpose. It may not be included with CD-ROM/DVD-ROM distributions. You are NOT allowed to make a charge for distributing this Software (either for profit or merely to recover your media and distribution costs) whether as a stand-alone product, or as part of a compilation or anthology, nor to use it for supporting your business or customers without the written permission of the author. It may not be distributed freely on any website or through any other distribution mechanism. 1. GRANT OF LICENSE. This EULA grants you the following rights: Installation and Use. You may install and use an unlimited number of copies of the SOFTWARE PRODUCT. Reproduction and Distribution. You may not reproduce and distribute an unlimited number of copies of the SOFTWARE PRODUCT. 2. DESCRIPTION OF OTHER RIGHTS AND LIMITATIONS. Limitations on Reverse Engineering, Decompilation, Disassembly and change (add,delete or modify) the resources in the compiled the assembly. You may not reverse engineer, decompile, or disassemble the SOFTWARE PRODUCT, except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation. Update and Maintenance The Reality Expansion Pack minor upgrates are FREE of charge. Separation of Components. The SOFTWARE PRODUCT is licensed as a single product. Its component parts may not be separated for use on more than one computer. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 68 Reality Expansion Pack Cessna C172SP Skyhawk Software Transfer. You may permanently transfer all of your rights under this EULA, provided the recipient agrees to the terms of this EULA. Termination. Without prejudice to any other rights, the Author of this Software may terminate this EULA if you fail to comply with the terms and conditions of this EULA. In such event, you must destroy all copies of the SOFTWARE PRODUCT and all of its component parts. 3. COPYRIGHT. All title and copyrights in and to the SOFTWARE PRODUCT (including but not limited to any images, photographs, clipart, libraries, and examples incorporated into the SOFTWARE PRODUCT), the accompanying printed materials, and any copies of the SOFTWARE PRODUCT are owned by the Author of this Software. The SOFTWARE PRODUCT is protected by copyright laws and international treaty provisions. Therefore, you must treat the SOFTWARE PRODUCT like any other copyrighted material. The licensed users or licensed company can use all functions, example, templates, clipart, libraries and symbols in the SOFTWARE PRODUCT to create new diagrams and distribute the diagrams. LIMITED WARRANTY NO WARRANTIES. The Author of this Software expressly disclaims any warranty for the SOFTWARE PRODUCT. The SOFTWARE PRODUCT and any related documentation is provided “as is” without warranty of any kind, either express or implied, including, without limitation, the implied warranties or merchantability, fitness for a particular purpose, or noninfringement. The entire risk arising out of use or performance of the SOFTWARE PRODUCT remains with you. NO LIABILITY FOR DAMAGES. In no event shall the author of this Software be liable for any special, consequential, incidental or indirect damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or any other pecuniary or physical loss) arising out of the use of or inability to use this product, even if the Author of this Software is aware of the possibility of such damages and known defects. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 69 Reality Expansion Pack Cessna C172SP Skyhawk LibCURL EULA LibCURL EULA The following statements are applicable only to the LibCURL library used to provide some features of this product. COPYRIGHT AND PERMISSION NOTICE Copyright (c) 1996 - 2018, Daniel Stenberg, daniel@haxx.se, and many contributors, see the THANKS file. All rights reserved. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of a copyright holder shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization of the copyright holder. ©SimCoders.com - For flight simulation only. Do not use for real flight Page 70

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