Yak-18T Normal Checklists
YAKOVLEV Yak-18T · Checklist
Overview
This document is a checklist for the Yakovlev Yak-18T aircraft, detailing the normal procedures for pre-flight, engine start, takeoff, and landing. It includes operational limitations, safety notes, and performance specifications.
- Engine start below 5 °C requires pre-heating or oil dilution.
- Rotate at 90 kph; unstick at 135 kph; climb at 170 kph.
- Normal oil temperature range is 50 – 65 °C.
- Minimum fuel pressure at idle is 0.15 kg/cm2.
- Maximum continuous cylinder head temperature is 220 °C.
- Takeoff weight limit is 1660 kg.
- Crosswind limit for takeoff is 23 kt.
- Crosswind limit for landing is 19 kt.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at beardsell.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Checklist
- Year ·
- 2010
- File size ·
- 92 KB
- Copy found at ·
- beardsell.com
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Oil capacity l ·
- 20
- Useful load kg ·
- 443
- Empty weight kg ·
- 1217
- Fuel capacity l ·
- 30
- Max takeoff weight kg ·
- 1660
Performance
- Max climb speed kph ·
- 170
- Max cruise speed kph ·
- 262
- Stall speed clean kph ·
- 123
- Max turbulence speed kph ·
- 300
- Stall speed flaps down kph ·
- 114
V-speeds
- VS_KIAS ·
- 66
- VY_KIAS ·
- 92
- VFE_KIAS ·
- 92
- VLE_KIAS ·
- 108
- VNO_KIAS ·
- 161
- VS0_KIAS ·
- 61
Weight & balance
- Cg limits ·
- 13.0 – 26.0
- Useful load kg ·
- 443
- Empty weight kg ·
- 1217
- Max takeoff weight kg ·
- 1660
What is the Yak-18T Normal Checklists?
The Yak-18T Normal Checklists is a checklist for the YAKOVLEV Yak-18T, dated 2010.
What year was the Yak-18T Normal Checklists published?
The Yak-18T Normal Checklists — the YAKOVLEV Yak-18T checklist on file — is dated 2010.
Common. More common than 82% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the YAKOVLEV Yak-18T.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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In this document
Pre-Flight (Cockpit)
Checklist includes ensuring brakes are on, landing gear is down and latched, battery switch is on, and fuel quantity is sufficient.
Engine Start
Do not turn on magnetos until the engine fires; hold starter until stable. If the engine rotates backwards, cease pressing starter immediately.
Before Takeoff
Ensure pilot door is closed, elevator trim is neutral, landing gear is down, and all necessary checks are completed.
Cruise
Monitor fuel pressure, oil temperature, oil pressure, and engine cylinder head temperature during cruise.
Before Landing
Reduce cowl shutters to manage cylinder head temperature, ensure landing gear is down, and check fuel sufficiency.
Engine Shutdown
Follow the shutdown procedure including closing the main air valve and ensuring all electrical switches are off.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Do not open the Emergency Air Valve.
- Do not pull engine through if cylinder temp is above 80 °C.
- Ensure mags & switches are off if engine fails to start after significant extra priming.
- Maximum duration of taxi/landing lights is 5 mins.
- Maintain oil temperature below 150 °C at shutdown.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
Yak-18T Normal Checklists v2.5 September 2010 http://beardsell.com/flying/yak18t Page 1 NORMAL CHECKLISTS NB: Engine start below 5 °C requires pre-heating or oil dilution. PRE-FLIGHT (Cockpit) Brakes On Landing Gear Handle Down & latched Magneto Switch Off (zero) Battery (master) Switch On (up) Engine Instrument Switch On Fuel Quantity Sufficient Engine Instrument Switch Off Battery Switch Off (mid position) Emergency Air Valve Closed (clockwise) Do not open the Emergency Air Valve Main Air Valve Open (anticlock) 9/10th Main Air Supply 30 – 45 kg/cm2 Cowl Shutters & Oil Cooler door Both open (forward) Boost (throttle) Closed (back) Flap Handle Up PRE-FLIGHT (External) Carry out normal external checks including: Engine Oil Level Sufficient (9 lit min) Fuel Sufficient Fuel Drain Check for Water Main Air Purge Valve Drain, clockwise to close HYDRAULIC LOCK PREVENTION By now throttle is closed, brakes on, mags off & master switch off! Chocks Securely set Inlet manifold drains Check open (up & twist) Propeller Pull through 7 blades Repeat if significant oil emerges Inlet manifold drains Close (twist & drop) Page 2 Yak-18T Normal Checklist v2.5 ENGINE PRIME Prime engine one stroke for every 10 °C below 100 °C, preferably simultaneously pulling propeller through. Do not pull engine through if cylinder temp above 80 °C Magneto switch Off (zero) Battery switch (master) Off (mid position) Operate primer Right to Prime Propeller Pull through 4 blades Inlet manifold drains Depress to drain excess fuel Chocks Remove BEFORE START Battery switch (master) On (up) Generator On Ignition Switch On Landing Gear Lights Switch On Engine Instruments Switch On Beacon On Boost (throttle) Open, close (back), 1” open Prop Fully fine (forward) Carburettor Heat Off (up) Oil Cooler Door Closed (back) Cowl Shutters Open (forward) Main Air Valve Open (9/10th anticlockwise) Main Air Pressure 20 prefer 30 – 45 kg/cm2 Emergency Fuel Shut-off Open (fully forward) Emergency Air Closed (clockwise) Primer Left – 2 or 3 strokes Fuel pressure Check rise Primer Turn right to assist start Engine / Flight Instruments Check http://beardsell.com/flying/yak18t Page 3 ENGINE START Do not turn mags on until engine fires or engine might run backwards; hold starter in for a few secs until engine is stable; if engine rotates backwards at all cease pressing starter immediately and retry. And check main air pressure rises after start. If engine fails to start after significant extra priming do not continue. Ensure mags & switches are off. Return to hydraulic lock prevention. Brakes On Starter Button Press & hold Primer Pump if required Magneto Switch 1+2 after engine fires AFTER START Boost (throttle) 40% RPM Oil pressure Green Primer Locked (vertical) Starter ring Turn right to lock (red dot) Cowl shutters & oil cooler Close both (back) Carb heat On (down) to warm up Remaining switches On as required Flaps Deploy; Check; Retract (up) Radio On; frequency set Intercom On Transponder Standby U/c retract warning light Check Warning Lights Check Stall Horn Check Volts & Amps Check / Gen Light Out Main Air Valve Check 9/10th open (anti~) Main Air Pressure Rising to 30 – 45 kg/cm2 Taxi Light As required Page 4 Yak-18T Normal Checklist v2.5 WARM UP & TAXI Before using greater than 50% RPM for taxi: Boost (throttle) 50% RPM Oil temperature (min) 40 °C Cylinder Head Temp (min) 120 °C Once CHT reaches 120 °C, set 60% RPM with boost (throttle) and select coarse prop pitch to quicken oil warm up. ENGINE RUN-UP Engine Ts & Ps Check Cowl Shutters Open (forward) Oil Cooler Open (forward) Propeller Fully fine (forward) Carb heat Off (up) Brakes On Boost (throttle) 70% RPM Engine Instruments Check Carb heat On (down), wait, off check RPM drop; air inlet temp rise. Prop Fully coarse & fully fine x2 check RPM decreases 54%, returns 70% Magnetos Both, 1, both, 2, both max allowable drop 3% Prop Set 64% RPM Boost (throttle) Open & close 10 units ensure CSU holds RPM; repeat Prop Fully fine (forward) Boost (throttle) 58% RPM Amp/Volt meter button Press: Check 28 V Boost (throttle) Idle Amp/Volt meter button Press: Check 23 V Generator Warning light Check turns on Boost (throttle) Open smoothly to 80% Boost (throttle) 50% RPM http://beardsell.com/flying/yak18t Page 5 BEFORE TAKEOFF Pilot Door Closed & latched Elevator Trim Neutral (green light) Landing Gear Handle Down & latched Magneto Switch 1+2 Warning Lights Check Starter ring Turn right to lock (red dot) Primer Locked (vertical) DI/Compass Synchronise Flight Instruments Check Altimeter Set Transponder Set 7000 Taxi light As required Propeller Fully fine (forward) Cowl Shutters Open (forward) Oil Cooler Door As required Flaps Up Main Air Valve Check 9/10th open (anti~) Main Air Pressure 30 kg/cm2 min Fuel Quantity Sufficient Emergency Fuel Shut-off Open (i.e. not pulled) Passenger Door Closed & latched Harnesses Waist & shoulders Flight Controls Full & Free Engine Ts & Ps Check TAKE OFF Rotate at 90 kph; Unstick at 135 kph; Climb at 170 kph Carb Heat Off (up) Brakes Off Boost (throttle) & propeller Both fully forward Engine Ts & Ps Check RPM & boost 100% & as expected No more runway, climbing? U/c retract Propeller 82% RPM (at safe height) Page 6 Yak-18T Normal Checklist v2.5 CRUISE Fuel Pressure 0.2 – 0.5 kg/cm2 Oil Temperature 40 – 75 °C Oil Pressure 4 – 6 kg/cm2 Main Air Pressure 30 – 55 kg/cm2 Engine CHT 220 °C max Electrics - Volts 26.5 – 28.5 Electrics - Amps 54 max BEFORE LANDING Cowl shutters Reduce CHT to 150 °C Carb heat On (down) Main Air Supply 30 – 55 kg/cm2 Speed < 200 kph Landing Gear Down, 3 greens, 3 poles Gear Retract Safety Latch Latched Landing/taxi Lights As required Maximum duration of taxi/landing lights 5 mins. Fuel Sufficient Speed < 170 kph Flaps Down Cowl Shutters As required for 150 °C Oil Cooler As required Doors Closed & latched Harnesses Secure SHORT FINALS Speed (with flaps) 150 kph Speed (flapless) 155 kph Landing Gear Down, 3 greens, 3 poles
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Propeller Fully fine (forward) Carb Heat Off (up) Cowl Shutters Open (forward) http://beardsell.com/flying/yak18t Page 7 AFTER LANDING Gear Retract Safety Latch Latched Flaps Up Oil Cooler Door Open (forward) Cowl Shutters Open (forward) Elevator Trim Neutral (green light) Landing Light Off (centre position) ENGINE SHUTDOWN Brakes On Cowl shutters Open (forward) Oil Cooler Door Open (forward) Non essential electrics Off (down) (all but first five from left + beacon) Prop Fine (forward) Boost (throttle) 28-34% RPM CHT 150 °C max (OAT ≥25 °C) 165 °C max Boost 60% RPM for 15 secs Boost Closed (back) Magneto Switch Off (zero) Flying within 1 hr? Open throttle as engine stops & reclose. Main Air Valve Closed (clockwise) Electrical Switches All Off (down except...) Battery switch (master) Off (...central position &...) Map / cabin light switch Off (central position) Oil Cooler Door Closed (back) Cowl Shutters Closed (back) Chocks Set Main Air Purge Valve Drain, close (clockwise) Manifold drains Open (push up & twist) Brakes Off Page 8 Yak-18T Normal Checklist v2.5 OPERATING LIMITATIONS SUMMARY SPEEDS Climb out 170 kph (92 kt) VY Cruise I 225 kph (121 kt) Max Cruise (Nom I) 262 kph (141 kt) Turbulence max 300 kph (161 kt) VNO Never exceed cannot find! VNE Gear extend 200 kph (108 kt) VLE Flap extend 170 kph (92 kt) VFE Approach with Flap 150 kph (81 kt) Approach without Flap 155 kph (83 kt) Touchdown 130 kph (70 kt) Stall Clean 123 kph (66 kt) VS Stall - Flap & Gear down 114 kph (61 kt) VS0 Best Glide speed cannot find! MAX G LIMITS At 1500 kg +6.4 and -3.2 At 1650 kg +5 and -2.5 POWER SETTINGS 99.4% RPM = 2900 crankshaft RPM = 1908 propeller RPM Take off, Nom I & Nom II : Throttle (boost) is unlimited RPM Boost Power lit / hr Take off 100% P0+1.3 360 hp 143 – 148 Nom I 82% P0+1.0 290 hp 113 – 135 Nom II 70% P0+0.8 240 hp 88 – 100 Cruise I 64% 7.4 max 180 hp 53 – 58 Cruise II 59% 6.7 max 145 hp 43 – 47 Idle 26% – – – P0 (at ISA sea level) = 1013 hPa = 76 cmHg = 7.6 boost http://beardsell.com/flying/yak18t Page 9 OIL QUANTITY Minimum 8 lit Aerobatics Less than 14 lit Normal 13 – 14 lit Long Cruise 15 – 16 lit Maximum 20 lit Total tank capacity 30 lit OIL PRESSURE Normal 4 – 6 kg/cm2 Minimum at Idle 1 kg/cm2 OIL TEMPERATURE Minimum 40 °C Normal (recommended) 50 – 65 °C Maximum (continuous) 75 °C Maximum (15 Minutes) 85 oC FUEL PRESSURE Normal 0.2 – 0.5 kg/cm2 Minimum at Idle 0.15 kg/cm2 CYLINDER HEAD TEMPERATURE Normal (recommended) 140 – 190 °C Minimum 120 °C Maximum (continuous) 220 °C Maximum (max 15 mins) 240 °C Max at Shutdown (OAT < 25 °C) 150 °C (OAT ≥ 25 °C) 165 °C Page 10 Yak-18T Normal Checklist v2.5 GENERATOR Normal Volts 26.5 – 28.5 V Minimum Volts 24 V Max Current 54 A MAIN AIR SYSTEM Minimum for start 20 kg/cm2 Minimum for take-off 30 kg/cm2 Normal 30 – 45 kg/cm2 Maximum 55 kg/cm2 WEIGHT & BALANCE Normal Aerobatic Empty (LG down) 18.5 %MAC 18.5 %MAC Permissible CoG 13.0 – 26.0 13.0 – 20.5 Empty 1217 kg 1217 kg Useful load 443 kg 303 kg Take off 1660 kg 1520 kg Sample full loads Fuel (139 lit) 100 kg 100 kg Oil 18 kg 18 kg Pilot 80 kg 80 kg Trainees 240 kg (3 pp) 80 kg (1 pp) Equipment 5 kg 25 kg Take off (LG up) 24.5 %MAC 19.5 %MAC Landing (LG down) 23.4 %MAC 17.8 %MAC (10kg fuel 9kg oil) http://beardsell.com/flying/yak18t Page 11 TAKEOFF CHARACTERISTICS Firm Grass Mass Speed Take off Run 10 m height 1650 kg 135 kph 370 m 670 m 1510 kg 125 kph 265 m 540 m Soft Grass Mass Speed Take off Run 10 m height 1650 kg 125 kph 500 m 920 m 1510 kg 120 kph 455 m 830 m LANDING CHARACTERISTICS Firm Grass Mass Speed Landing Run From 15 m 1650 kg 130 kph 470 m 790 m 1510 kg 120 kph 390 m 690 m Soft Grass Mass Speed Landing Run From 15 m 1650 kg 125 kph 350 m 650 m 1510 kg 124 kph 350 m 610 m CROSSWIND LIMITS Take off 23 kt Landing 19 kt Page 12 Yak-18T Normal Checklist v2.5 http://beardsell.com/flying/yak18t Page 13