Schempp-Hirth Flugzeugbau Ventus-3T Sport, Руководство по эксплуатации самолета, Страница: 81 / 177

SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3T „Sport“ FLIGHT MANUAL
April 2018 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 stall
behavior at a safe height. This should be done using the various flap settings
whilst flying straight ahead and also whilst in a 30° to 45° banked turn.
Wings level stall
Stall warning usually occurs 5 to 10 km/h (3 to 5 kt, 3 to 6 mph) above stalling
speed. It begins with vibration in the controls. If the stick is pulled further back,
these effects become more pronounced, the ailerons get spongy and the
powered sailplane sometimes tends to slight pitching motions (speed
increases again and will then drop to stalling speed).
Note:
Before 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
powered sailplane 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 depends on the response time of the pilot and is between 60 and
110m (197 to 361 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.