Schempp-Hirth Ventus-3M Performance, Предварительное руководство по эксплуатации самолета

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SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3M „Performance“ FLIGHT MANUAL
March 2019 CS 22
Revision – 3.5.1
3.5 Spin recovery
A safe recovery from a spin is performed as follows:
o Aileron in neutral position.
o Apply rudder against the direction of the spin rotation
o Ease control stick forward until rotation ceases and the airflow is restored
o Centralize rudder and pull gently out of dive.
With the center of gravity in medium to rearward position a steady spinning motion
is possible at every flap setting. After having applied the standard recovery
method, the aircraft will continue rotating, depending on the flap position for about
¼ to 1 turn.
The loss of height, from the point at which recovery is initiated to the point at which
horizontal flight is first regained, can be up to 250 m / 820 ft. The recovery speeds
are between 160 and 250 km/h (86 - 135 kt, 100 - 155 mph).
At positive flap settings and high all-up masses, a resetting of the flaps at “0” may
be required to avoid exceeding the speed limits for positive flap settings when
pulling out of the dive.
Spinning with the center of gravity in the foremost position is only possible with
positive flap settings and very dynamic stall. If stalling normally the aircraft mostly
enters in a spiral dive - sometimes with strong side slip angle - or a side slip.
Recovery is done by applying the manoeuvers indicated for this case - see section
3.6.
CAUTION:
Should the powered sailplane enter a spin with its engine running, then– in
addition to the actions required by the above recovery method – the throttle
must immediately be closed.
Spinning may be safely avoided by following the procedure given in section
3.4 “Stall recovery”.
The recovery from spin with positive flap settings is speeded up by easing the
flap handle in negative flap settings.
When spinning in extreme configurations (i.e. unintentional extreme aft c.g.
position or extreme asymmetric water ballast) it can be required to stop the
spin – especially at positive flap positions – by moving the flap in position “0”.
In such extreme configurations it may be possible that the aircraft will do more
than 1 additional turn after initiating recovery.