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 – 4.5.3.5
Low speed flight and stall behaviour
In order to become familiar with the aircraft it is recommended to explore its
stall behaviour at a safe height. This should be done using the various flap
settings while flying straight ahead and also in banked turns (30° to 45° bank).
Wings level stall
Stall warning usually occurs 5 to 10 km/h (3-5 kt, 3-6 mph) above stalling
speed. It begins with a slight vibration in the controls. If the stick is pulled
further back, these effects become more pronounced, the ailerons get spongy
and the aircraft sometimes tends to slight pitching motions (speed increases
again and will then drop to stalling speed).
Note:
Befor reaching stalling speed, the ASI reading drops quickly depending on
the c/g-position. The ASI starts oscillating because of the turbulent airflow
affecting the pitot pressure probe.
When reaching a stalled condition with the c/g in rearward positions, the
aircraft can be maintained in this condition with the stick fully pulled back or it
may slowly drop a wing.
A normal flight attitude is regained by easing the stick firmly forward and, if
necessary, applying opposite rudder and aileron.
The loss of height from the beginning of the stall until regaining a normal level
flight attitude is may be between 70 m and 120 m (230-390 ft).
In the case of forward c/g positions and stick fully pulled back, the aircraft
mostly continues to fly in a mushed condition.
Normal flying attitude is regained by easing the stick forward.