Yak 18T Flight Operations Manual
Page 31 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.
6.4. Engine Starting
To start the engine, the pilot should proceed as follows -
• have a good look round and check for any PEOPLE, ANIMALS or VEHICLES that
may have unexpectedly approached the aircraft
• even if your aircraft does not have the small windows at the front of the cockpit, it is
still advisable to open the cockpit door, look around and announce loudly “CLEAR OF
PROPELLER” and listen carefully for any response
• once happy, close the cabin door and fit your safety harness securely
• SWITCH the BATTERY-GROUND SUPPLY to the ON position
• SWITCH the circuit breakers IGNITION, UNDERCARRIAGE WARNING, ENGINE
INSTRUMENTS, ELECTRIC TURN INDICATOR and GYRO-HORIZON to the ON
positions
• TURN the start button-casing counter clockwise until the red mark is pointing north.
The starter button is now live and the engine is now ready to be started
• LOOK AROUND AGAIN for any PEOPLE, ANIMALS or VEHICLES
• PRESS the START button as far as it will go. Duration of a continuous depression
should not exceed 3 seconds
• after the propeller has been turned through 3-5 turns, switch the MAGNETOS ON by
setting the switch to 1+2 position. To provide a more successful start of the engine
after the first flashes, feed additional fuel into the cylinders with the help of the
primer (which was intentionally left out in the previous steps)
• DURING start, if flashes appear in the cylinders, it is allowed to continue the engine
starting procedure by displacing the thrust lever forwards and backwards in the range
of revolutions, corresponding to 28%-60%, a throttle retard and accelerate rate is
2-3 seconds
• after STABLE ENGINE OPERATION has been obtained, RELEASE the start button
and SET the thrust lever to the position corresponding to 38%-41%, while
simultaneously observing the oil pressure and the pressure gauge readings
• after the engine start, LOCK the priming pump handle by setting it to the centre
position. MOVE the start button clockwise to the locked position, cut in the
generator and warm-up the engine
• If the engine fails to be started after two attempts, stop the starting and identify the
reason
CAUTION
• Prior to re-starting, observing all precautions (e.g. engine temperature) pull the propeller
through manually by 4-8 full revolutions to remove fuel and oil from the cylinders which
has remained there after a previous start (if it was performed with priming) in order to
avoid hydraulic shock
• If during 15-20 seconds after the engine has been started, OIL PRESSURE does not
reach a value of 1.0 kgf/cm2, SHUTDOWN the engine and locate the cause
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