Yak 18T Flight Operations Manual
Page 46 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.
•
While slipping, keep the flight direction using a reference point orientation, check the
speed and keep it according to the nose-over position relative to the horizon and by using
the speed indicator
•
CHECK
the designated bank by the aircraft inclination relative to the horizon and by the
attitude indicator (gyro-horizon)
•
RECOVER
the aircraft from slipping by a simultaneous motion of the yoke towards the
side opposite to the bank and slightly forward
•
When the bank has decreased, place the rudder pedals
in the NEUTRAL
position and
maintain a gliding speed of
170km/h
•
Dampen the residual aircraft
DRIFT
after slipping with a return bank. Do
NOT
allow the
temperature of the cylinder heads to drop below 120°C while slipping
8.9 Slow/Barrel Rolls
•
BEFORE
entry into this manoeuvre, study the surrounding airspace to make sure that no
other aircraft are flying in proximity of your aircraft, that you will remain clear of cloud,
congested areas and that sufficient altitude is available should the manoeuvre is not
successful. Select the necessary ground reference points for completing the manoeuvre
•
To perform a slow controllable roll,
SET
the indicated airspeed of
230km/h
, the engine
crankshaft speed equal to
70%
with a full boost
•
Then impart a pitch-up angle of
10°-15°
and hold this position
•
INITIATE
a longitudinal rotation by smoothly deflecting the yoke in the direction of the
roll. When
45°-50°
of bank has been achieved, proceed to pull the yoke being careful
not to slow the rotation. This is necessary to
PREVENT
the aircraft from turning when
upside-down and to
PREVENT
the nose from dropping below the horizon
•
After having
PASSED
the inverted position, with an angle of bank of
40°-50°
before
levelling out in order to hold the aircraft relative to the horizon.
INCREASE
depression
on the rudder pedal for rotation and as the aircraft approaches the
20°-30°
banked
attitude, hold the aircraft nose-over position within the horizon line by pulling the yoke
backwards
•
As soon as the aircraft approaches level flying attitude,
STOP
the rotation,
SET
the
controls to recovery and then to the
NEUTRAL
position when rotation comes to an end.
The aircraft X-rotation/roll should be a
UNIFORM
one
•
Good rolls should be performed
WITHOUT
altitude loss. The procedure of making left
and right rolls is the
SAME
8.10 Flick/Snap Rolls
•
BEFORE
entry into this manoeuvre, study the surrounding airspace to make sure that no
other aircraft are flying in proximity of your aircraft, that you will remain clear of cloud,
congested areas and that sufficient altitude is available should the manoeuvre is not
successful. Select the necessary ground reference points for completing the manoeuvre
•
To perform a flick roll,
SET
the indicated airspeed of
190km/h
rpm
70%
and the
engine boost 650-700mm of Hg.
•
Impart a pitch-up angle of
10°-15°
to the aircraft and hold this position
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