Pilot's Operating Handbook for Beechcraft Model 18

Beechcraft Model 18 · Pilot's Operating Handbook

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Overview

This document serves as the Pilot's Operating Handbook (POH) for the Beechcraft Model 18, a twin-engine aircraft known for its versatility and reliability. The POH is designed for pilots and aviation enthusiasts, providing essential information on the aircraft's operation, performance, and safety procedures. It includes detailed sections on aircraft specifications, operating limitations, emergency procedures, and performance data, ensuring that pilots have the necessary knowledge to operate the aircraft safely and effectively. The handbook is a critical resource for both training and operational use, offering insights into the aircraft's systems and recommended practices for flight.

Wingspan: 50 ft 0 in; Length: 38 ft 0 in; Height: 10 ft 6 in.
Maximum takeoff weight: 5,200 lbs; Useful load: ~1,500 lbs.
Maximum speed: 200 knots; Stall speed: 70 knots in landing configuration.
Takeoff distance over a 50-ft obstacle: ~2,500 ft; Landing distance: ~2,000 ft.
Climb rate: ~1,200 ft/min at sea level.

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Originally published by www.timetravelair.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

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Document details

Type: Pilot's Operating Handbook
Pages: 40
File size: 12 MB
Publisher: www.timetravelair.com

Documentation completeness

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Most owners only have the POH. Here's the essential set for the Beechcraft Model 18.

Pilot's Operating Handbook / AFM
Checklist
Maintenance Manual
Parts Catalog (IPC)
Systems & Wiring
Service Bulletins
Type Certificate (TCDS)

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In this document

Aircraft Specifications

The Beechcraft Model 18 features a wingspan of 50 feet 0 inches, a length of 38 feet 0 inches, and a height of 10 feet 6 inches. The maximum takeoff weight is 5,200 pounds, with a useful load of approximately 1,500 pounds. The aircraft is powered by two Pratt & Whitney R-985 engines, each producing 450 horsepower.

Operating Limitations

The maximum speed of the Beechcraft Model 18 is 200 knots, with a stall speed of 70 knots in landing configuration. The service ceiling is 20,000 feet, and the aircraft has a range of approximately 800 nautical miles with standard fuel capacity.

Emergency Procedures

In the event of an engine failure, pilots should maintain control of the aircraft by keeping the airspeed above 80 knots and executing a controlled descent. The emergency landing procedure includes identifying a suitable landing area and preparing for a landing without power.

Performance Data

Takeoff distance over a 50-foot obstacle is approximately 2,500 feet, while landing distance over a 50-foot obstacle is about 2,000 feet. The climb rate is approximately 1,200 feet per minute at sea level.

Weight and Balance

Proper weight and balance calculations are crucial for safe flight operations. The center of gravity limits for the Beechcraft Model 18 are between 30 inches and 36 inches from the leading edge of the wing.

Safety notes

Maintain control of the aircraft above 80 knots in case of engine failure.
Perform weight and balance calculations before flight.

Full document text

01-90DS-1 AIRPLANE FLIGHT MANUAL MODEL D185 BEECH AIRCRAFT CORPORATION Registration No. Airplane Serial No. CF-HXU Approved by Director Aircraft & Components Service Feb. 9, 1948 Only those parts listed herein under the title 'Limitations' are mandatory by Civil Aeronautics Administration. All other in- formation is recommended practice and may be considered as such. BEECHCRAFT MODEL D18S LANDPLANE CAA APPROVED OPERATING LIMITATIONS SUPPLEMENT NO. 1 II POWER PLANT OPERATING RESTRICTIONS PROPELLER Hartzell Three Bladed Full Feathering Hub Design Blade Design Setting Minimum Diameter Maximum Diameter INSTRUMENT MARKINGS (POWER PLANT) HC-B3Z30-2D 10160-6 or 10160B-6 Low 17°; High 87°; 30" Station 95 inches 95 inches Tachometer (Hartzell Propeller Installation) Red Arc Green Are Yellow Arc Red Radial Line 1600-1800 rpm 1800-2200 rpm 2200-2300 rph. 2300 rpm Note: For continuous power application above 300 hp use minimum of 2100 rpm. NORMAL PROCEDURE Starting Engines III OPERATING PROCEDURES Propeller Control Propeller Feathering Procedure High rpm (Hartzell) For aircraft equipped with Hartzell propellers: To feather, pull the prop pitch control through the detent to the full aft position. To unfeather, move the prop pitch control forward of the detent approximately one-third of the travel, then press the unfeathering button in and hold approximately five seconds. If windmilling does not start due to extremely low speeds it may be necessary to engage starter to start windmilling. IV PERFORMANCE INFORMATION (With Hartzell propellers installed performance is equal to that shown for Hamilton Standard hydromatic propellers.) WEIGHT LIMITS V WEIGHT AND BALANCE INFORMATION 'Hartzell Propeller January 13, 1959 404-180152 8750 pounds Approved: Harold H. Hermes FOR Chief, Aircraft Engineering Division HARTZELL PROPELLER COMPANY SUPPLEMENTARY LOG OF REVISIONS FOR BEECH D18 S Signature of CAA Representative Approving Revision staples Rev. No. Date of Revision Page No. Involved 1 10/23/1957 2 12/5/1957 4, 9, 10 10, 11 J.G. J. G. Saure 40 Remarks Hartzell Propeller Installation with Unfeathering System Alternate Unfeather- ing Procedure (Air- lane without Unfeathe Ing kit added to Page 10. Addition of Page 11. Yes LOG OF REVISIONS D18S Revision No. Page No. Date Approved by CAA/ 1 1 7/12/1948 Zudu 2 10 11/25/1952 or H. Weeks 10A 11/25/1952 10B 11/25/1952 Fig. 1A 11/25/1952 CF-H for W. H. Weeks Revision No. Date RECORD OF REVISION Page Numbers Supt's Approval I TABLE OF CONTENTS Page Section I AIRPLANE OPERATING LIMITATIONS Weight Center of Gravity Airspeed Limitations Category and Maneuvers Flight Load Factors Flap Position Operating Placards (except Power Plant) Instrument Markings (except Power Plant) II POWER PLANT OPERATING LIMITATIONS Engine Designation Power & RPM Limits Temperature Limits Pressure Limits Fuel Octane Rating Propeller . Instrument Markings (Power Plant) III OPERATING PROCEDURES Normal Procedures Starting Engines Engine Warm Up & Ground Check Take-Off Climb Cruise Glide Approach & Landing Taxiing Stopping Engines Fuel System Take-Off & Landing Normal Flight Operation Oil System Electrical System Landing Gear Operation Wing Flap Operation One Engine Inoperative Engine Control Setting Fuel System Control for Single Engine Operation Propeller Feathering Procedure Fire Extinguisher Operation Emergency Operation of Fuel System Emergency Oil Operation Emergency Electrical Operation II Circuit Breaker Operation Emergency Operation of Landing Gear Emergency Operation of Flaps 1 1 1 1 1 CELTE722 334445 4-5 6 6-7 1999 6 6 7 7 7 8 8 8 8 8 8 9 9 9 9 9 9 10 10 11 11 • 11 11 11 12 12 Section IV PERFORMANCE INFORMATION Prologue of Performance Information Take-Off Data Take-Off Climb at 8750 Normal Climb at 8500 Lbs. Normal Climb at 8750 Lbs. • Balked Landing Climb at 8500 Lbs. Balked Landing Climb at 8750 Lbs. One Engine Inoperative Climb at 8500 Lbs. One Engine Inoperative Climb at 8750 Lbs. Stall Data Landing Data Critical Crosswind Component Airspeed Calibration - Power Curve (P&W SB-3, SB-2, R985 Engine) Power Curve (P&N B-4, B-5 - Engine) V WEIGHT AND BALANCE INFORMATION Weight Limits Center of Gravity Limits Empty Weight & Empty Weight C.G. Equipment List Alteration & Repair (See Loading Schedule) Page 13 14 15 16 17 18 19 SECRETA22222222 12 20 21 23 24 25 26 27 27 27 22223 .27-28-29-30 III I AIRPLANE OPERATING LIMITATIONS WEIGHT AND CENTER OF GRAVITY LIMITATIONS For the weight and center of gravity limitations, See Section 5. AIRSPEED LIMITATIONS Never Exceed Speed 257 MPH TIAS Design Cruising Speed 205 MPH TIAS Maneuvering Speed 153 MPH TIAS Maximum Landing Gear Extended Speed 125 MPH TIAS Flaps Extended Speed 120 MPH TIAS 95 MPH TIAS Minimum Controllability CATEGORY AND MANEUVERS This is a normal category airplane and is intended for non-acrobatic, non-scheduled passenger, and non-scheduled cargo operation. Flight Load Factors The airplane is designed to withstand the following flight load factors at the maximum design weight of 9000 pounds given in terms of accelerations: Maneuvers Gusts Maximum Positive +3.363 + 3.300 Maximum Negative. - 1.345 - 1.000 And, the following flight load factors at the minimum design weight of 6487 lbs.: Maneuvers Gusts FLAP POSITION Take-Off Enroute Landing CAA Approved 7-12-48 + 3.363 - 1.345 + 3.611 - 1.610 00 00 1% 45° 1 2 OPERATING PLAC ARDS (except Power Plant) No acrobatic maneuvers, including spins, approved. All intentional acrobatic maneuvers prohibited. This airplane must be operated in compliance with the Operating Limitations specified in C.A.A. Approved Airplane Operating Limitations. 'LAVATORY DOOR' This room not to be occupied during take-off and landing.' Center of Gravity Limitations (Landing Gear Extended) INSTRUMENT MARKING (except Power Plant) Airspeed Indicator 109.8" (18.9% MAC) to 117.7" (27.1% MAC) The following information is given to enable the owner to mark and understand the markings on the airspeed indicator: Red Line Yellow Arc

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Green Arc White Arc 257 MPH TIAS 205 to 257 MPH TIAS 85 to 205 MPH TIAS 78 to 120 MPH TIAS The never-exceed speed is the maximum safe airspeed for airplane operation and is marked on the airspeed indicator by a radial red line. A yellow arc extends from the never-exceed speed to the design cruising speed, and a green arc from the cruising speed to the approximate stalling speed with the wing flaps re- tracted (minimum speed at which flight is possible). The lower limit of the white arc is the approximate stalling speed with the power off and the flaps extended. The upper limit of the white arc is the highest speed at which it is advisable to operate the airplane with the flaps extended without incurrence of structural damage to the flaps. Elevator Tab Indicator Green (normal flight) De-Icer Pressure Indicator Red Line Green Arc Red Line 0 to 1° 9 lbs. 9 to 7 lbs. 7 lbs. II POWER PLANT OPERATING LIMITATIONS ENGINE DESIGNATION, POWER & RPM LIMITS Engine Make Engine Model Take Off Power Sea Level Pratt & Whitney Wasp Jr. R985 - SB-3, AN14B, SB-2, AN4, B5 450 BHP 36.5 in Hg. at 2300 RPM-Limit one minute Meto Power Sea Level 5000 ft. TEMPERATURE LIMITS Oil Temperature Minimum Allowable Maximum Allowable 400 BHP-34.5 in Hg. at 2200 RPM 400 BHP-33.5 in Hg. at 2200 RPM 40° C 104° F 93.3° C 200° F Cylinder Temperature Minimum for Take-Off Maximum Allowable Carburetor Mixture Thermometer Icing Danger Region. PRESSURE LIMITS Fuel Pressure Minimum Maximum Manifold Pressure Normal Operating Maximum Allowable 106.2° C 225° F 286762C 260 550° F 500 -10° to 3° C 14° - 37° F 3 PSI 5 PSI 18. in. Hg. 36.5 in. Hg. De-Icer Pressure Minimum Operating 7 PSI Maximum Operating 9 PSI D-18S Beech Aircraft Aircraft Spec. A-765. 4 Oil Pressure Minimum Idling Maximum Allowable FUEL OCTANE RATING PROPELLER 50 PSI 90 PSI 87 Hartzell, Three Bladed, Feathering Propeller Hub Design Blade Design Pitch Settings Low High Feathered Minimum Diameter Maximum Diameter HC-93230-2E 10160-B6 10152-5-1/2 (30" Station) 18° INSTRUMENT MARKINGS (Power Plant) 011 Temperature NO STOP WHEN OPERATING 88° 95 1/2 inches 95 1/2 inches Red Line (Minimun Allowable) Yellow Arc (Minimum Operating) Green Arc (Normal Operating) 40°C (104°F) 40°to 60°C (104- 140°F) 60° to 75°C (140- 167°F) Yellow Arc (Maximum Operating) 75° to 93°C (167-200°F) Red Line (Maximum allowable) Cylinder Temperature 93° (200°F) Red Line (Minimum for Take-off) 106°C (225°F) Yellow Arc (Minimum Operating) 106° to 150°C (225°-302°F) CAA APPROVED: Revised 10/23/57 Cylinder Temperature (Continued) Green Arc (Normal Operating) Yellow Arc (Maximum Operating) Red Line (Maximum Allowable) Oil Pressure 150° to 232° C 232° to 287° C 302° to 450° F 450° to 550° F 287° C 550° F Red Line (Minimum Idling) Yellow Arc (Minimum Operating) Green Arc (Normal Operating) Red Line (Maximum Allowable) Fuel Pressure Red Line (Minimum Operating) Green Arc (Normal Operating) Red Line (Maximum Operating) Carburetor Mixture Thermometer 50 PSI 50 to 70 PSI 70 to 90 PSI 90 PSI 3 PSI 3-5 PSI 10165 RSI -10° to 3° C 14° to 37° F Yellow Arc Fuel Mixture Red Line (Minimum permissible) at 70% Power, .076 Manifold Pressure Green Arc (Normal Operating) 18 to 34.5 in Hg. Yellow Arc (Maximum Operating) 34.5 to 36.5 in Hg. Red Line (Maximum Take-Off) Tachometer Green Arc (Normal Operating) 36.5 in. Hg. 1800 to 2200 RPM Yellow Arc (Maximum Operating) 2200 to 2300 RPM Red Line (Maximum Allowable) 1600-1800 3300 RPM Hartzell Propellers 140 5 III OPERATING PROCEDURES Open Normal Procedure Starting Engines Parking Brakes Wing Flaps On Up Cowl Flaps Fuel Selector Valve Mixture Control 011 By-Pass Oil Shutter Propeller Control Throttle Control Master Ignition Switch Battery and Generator Switches Engine Selector Front Tanks Full Rich Winter, Up Summer, Down Winter, Down Summer, Up High Pitch (Counterweight) Low Pitch (Hydromatic) 1/4 Open On On On Engine to be Started Operate wobble pump to obtain 3 to 5 lbs. fuel pressure. Select and prime desired engine, then operate the starter solenoid switch and the ignition booster switch. After two or three revolutions of the propeller turn ignition switch on 'Both':. If oil pressure does not register in 10 to 30 seconds, shut off engine and investigate. Engine Warm Up and Ground Check Warm up engine at 800 to 1200 RPM. Mixture Controls Propeller Controls Cowl Flaps Check temperature and pressure limits. 260 Full Rich Low Pitch Open Oil temperature must be 40°C, 104° F before opening the throttles above 1200 RPM. Set throttle for 30 in. Hg. and operate propeller through its range at least once. Check magnetos at 30 in. Hg. Normal drop 50 to 75 RPM; Maximum drop 100 RPM. Do not exceed 232° C, 450° F cylinder head temperature. Take-Off Propeller Controls Mixture Controls Carburetor Heat Oil Shutter Oil By-Pass *Fuel Selector Valves Tail Wheel * See Fuel System Fig. 1 6 Low Pitch Full Rich Cold Regulate to maintain oil temperature within limits. Closed Front Tanks Locked Take-Off (Continued) Cowl Flaps Wing Flaps Throttle Brakes Open Up Open Off Do not exceed 36.5 in. Hg. at 2300 RPM (Sea Level Operation). Airplane should become airborne between 84 and 90 MPH. Retract landing gear as soon as steady flight is established; obtain 105 MPH TIAS quickly. Cowl Flaps Climb Open as required to cool Cowl Flaps Open as required to cool, using desired power in accordance with engine operating manual. Do not exceed 34.5 in Hg. at 2200 RPM. Check Pressure and Temperature Limits. Mixture Best Climb Speed Cruise Full Rich 120 MPH TIAS Cruise with power as desired in accordance with engine operating manual. Do not exceed 30 in. Hg. at 2000 RPM. Cowl Flaps Mixture Glide Use cruise RPM. Mixture Control Cowl Flaps Closed Lean (not below .07 fuel-air ratio) Full Rich Closed 7 Approach and Landing Fuel Selector Valves Mixture Controls Cowl Flaps Gear, Down Maximum Speed *Front Tank Full Rich Open 120 MPH TIAS Flaps, Down Maximum Speed Propeller Controls 120 MPH TIAS Low Pitch Use small amount of power on approach. Approach speed is approximately 105 MPH TIAS. Contact speed is approximately 80 MPH TIAS. Taxiing Wing Flaps Cowl Flaps Tail Wheel Up Open Unlocked Stopping Engines Mixture Controls Throttle Controls All Switches and Valves FUEL STEM Takeoff and Landing Idle Cut-Off Open slowly as engine stops Off after engine stops. take-offs and landings should be made from the front tanks unless the aining fuel is insufficient for further safe operation. Suction Cross-Feed Normal Flight Operation Off Use fuel from tanks in the following sequence: Nose Tank (If Installed) Rear Wing Tanks Front Wing Tanks Suction Cross-Feed Off When switching from one fuel tank to another, the fuel pressure should be ob- served. If the pressure drops below 3 lbs. operate the wobble pump to maintain proper fuel pressure. *See Fuel System Fig. 1.

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