Yak 18T Flight Operations Manual
Page 66 of 82
Disclaimer: This manual is to be used as a reference only, it is based on translated Yak 18T Flight Operations
Manuals and has not been approved by the Yakovlev Design Bureau or any other authority.
• TURN the master switch and magnetos OFF, drain the intakes, pull the propeller
through, prime the cylinders and pull the propeller through again, switch the master
instruments ON, prime the carburettor and provide 3 more shots to the cylinders,
pump throttle idle-full-idle-open 1/4", ignition switch ON, start button PUSH, hold it
for about 5 SECONDS, no sound, no hissing, no rotation, no clicking, nothing, then
it is possible for the engine to start, magnetos ON, throttle to IDLE
LESSON: if there's fuel/air in the cylinder and the shower of sparks is cooking, it
could fire at anytime with no air, no rotation and no warning. If anyone asks you to
hand prop an M-14P, you both better know EXACTLY what you're doing!
DO NOT move the propeller when the engine is above 85°C. It can be FATAL!
REMEMBER, the cylinder head temperature (CHT) can still be 100°C even 20 minutes
after shutting down and the engine COULD START even with the ignition and magnetos
OFF. The best advice is to assume that the propeller is live at all times and to be cautious
accordingly.
Under normal circumstances, the magneto switch should be in the 0 position until the engine
starts on the sparks, then put onto both. The shower of sparks only works if you have a
working battery. If the battery is flat there is no shower. If there is no air there is no
rotation.
If the battery is flat then you can only try to start with the magnetos and you might as well
have both switched ON. However, even with a full air bottle the rate of turn of the starter is
seldom enough to get over the compression quick enough and the engine will usually fire
BACKWARDS – not a good idea.
11.18. Special Feature of the Power Unit at low ambient
temperatures
To provide trouble-free engine operation during low ambient temperatures of +5°C and less,
the power unit of the aircraft should be prepared for operation in wintertime.
To Next Page
Loading...