Yakovlev Yak-12M — YAK_12M_checklist
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External
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Kick the tyres, nothing about to fall off etc.
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Oil level > 8 litres.
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Fuel levels OK.
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Turn engine 9 blades; watch for the oil.
Internal / starting
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All switches off, mags off etc.
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Fuel OK.
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Air on.
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Brakes on.
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Fuel on.
ON
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Mixture rich.
RICH
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Close oil cooler.
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Close carb heat.
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Open Gills.
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Flaps up.
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For cold start;
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If you have an assistant, 9 blades, 1 prime each.
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Otherwise, 8 primes, suck in, then 2 more.
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For warm start,
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1 prime per 10° below 100 cylinder head temp.
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Master switch on.
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Generator on.
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DC converter.
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Starter on.
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Set throttle.
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Press starter, when engine turns correct way, mags on both.
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When engine fires, set throttle and prime as necessary.
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Set 1000 RPM.
1000 RPM
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Close Gills until cylinder head temp rises, then open as necessary.
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Open oil cooler as necessary.
Before Taxi
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Switches on as necessay.
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Radio on and set.
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Set DI to compass
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Set altimeter.
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Uncage artificial horizon.
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Do not taxi until oil temp in green.
Taxi
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Note; tail wheel unlocked when stick forward.
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Check brakes and steering.
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Check pneumatic pressure maintained.
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Check turn and slip move correctly.
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Check DI moves correctly.
Engine checks
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Oil temp in green.
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Cylinder head temp in green.
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Set 2000 RPM
2000 RPM
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Check mags.
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Exercise prop.
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Check carb heat.
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Set idle; engine continues to run.
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Set 1000 RPM.
1000 RPM
Pre take off vital checks
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Mags on both.
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Trim set.
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Flaps to 15°
15°
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Fuel on and sufficient.
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Mixture fully rich.
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Starter covered.
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Primer locked.
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Prop fully fine.
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Oil temp green.
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Cylinder head temp green.
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Set DI to compass.
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Switches on as necessary.
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Controls full and free.
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Hatches and harness’ secure.
Take off
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Set full power, then back to 7.5 boost.
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Set prop to 2000 RPM.
2000 RPM
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Take off with tail up or 3 point.
Climb
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boost, 2000 RPM.
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Flaps up above 300 feet.
Cruise
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boost, 1860 RPM, no flaps.
Descent
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Reduce throttle.
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Flaps extend below 140kmh
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Final approach 110kmh, Prop to fine
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Note land with stick back to ensure tail wheel locked - risk of ground loops.
Close down
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Brakes on.
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Set 1000 RPM
1000 RPM
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Check mags.
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Flaps up.
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Close carb heat.
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Unnecessary electrics off.
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Set idle.
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Mags off.
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Open gill flaps.
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Electrics off.
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Close pneumatic valve.
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Stick free and brakes off for manoeuvring.
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Drain water trap