Yak 18T Flight Operations Manual
Page 53 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.
•
for getting the aircraft out of the spin,
DEFLECT
the rudder vigorously and
FULLY
against the spin and in 3 seconds after the rudder kick, move the yoke fully
FORWARD
. A
LAG
, when this is done, can be equal to
1-1.5
turn at the left spin
and
2-2.5
turns at the right one (The
LAG
during spin recovery is counted from the
moment the elevator is applied)
•
the aircraft recovers in a dive that is almost vertical when the rotation comes to an
end,
SET
pedals to the
NEUTRAL
position and at acceleration of 3-4 recover the
aircraft from a dive not allowing the IAS to exceed by more than
300km/h
9.3. Recovery from an Inverted Spin
The Yak 18T is
PROHIBITED
from inverted spin training and practice flights.
•
The aircraft's inverted spin is
STEEPER
than the normal spin. It is
NOT DIFFICULT
to
RECOVER
•
This is done with a full and vigorous rudder pedal
DEFLECTION
towards the side
OPPOSITE
to the spin direction
•
With a subsequent 1-2 second
DELAY
, deviate the yoke
BACKWARDS
beyond the
NEUTRAL
position (by ¼-1/5
th
motion). The
LAG
experienced during recovery from the
inverted spin is at
LEAST
1 turn
9.4. Unintentional Snap or Fall into Spin
The spontaneous fall into a spin can
ONLY
occur as a result of
GROSS PILOTING
ERRORS
.
While training or in flying practice it is
PROHIBITED
to perform a fall into a spin from
VERTICAL
manoeuvres (i.e. zoom, loop, half-loop and combat turn).
Inadvertent entry into a spin from a
360°
turn or spiral towards the side opposite to the
bank is
PROHIBITED
.
•
A spin
CAN
occur when making steep climbs, loops, half-loops and combat turns; usually
when the yoke is pulled backwards and simultaneously the rudder (pedal) is fully
deflected aside. With the controls in such as position the aircraft first rolls and then
drops the nose and goes into a spin
•
In
ALL
cases of a spontaneous fall into a spin,
REMOVE
the boost
IMMEDIATELY
•
SET
the aileron to the
NEUTRAL
position and determine the spin direction
•
RECOVER
the aircraft from the spin by using one of the methods mentioned above
•
During training, to teach manoeuvring in order to
CORRECT
“errors”, an inadvertent
entry into a spin is
ALLOWED
only from a descent turn (spiral) with the engine fully
UNBOOSTED
. To perform an inadvertent entry into the descent turn spin –
•
when the IAS is
150-170km/h
the aircraft is rolled into
50-60°
banked turn
•
during the turn,
PULL
the yoke backward and simultaneously
FULLY
deflect the
rudder pedal (against the stop)
TOWARDS
the turn
•
the aircraft will vigorously
ENTER
into the spin
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