SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
Low speed flight and stall behaviour
(power plant retracted)
In order to become familiar with the powered sailplane it is recommended to explore
its low speed and stall characteristics at a safe height. This should be done using
the various flap settings while flying straight ahead and also in a 45° banked turn.
Wings level stall
The first signs of a stall usually occur 5 to 10 km/h (3-5 kts, 3-6 mph) above stalling
speed. It begins with a slight rolling motion and 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 a stalled condition, depending on C.G. position, the ASI
reading drops quickly by 5 to 10 km/h (3-5 kts, 3-6 mph).
When reaching a stalled condition with the c/g in middle and rearward positions, the
stick reaches the stop and the powered sailplane remains in deep stall or drops the
wing respectively the nose.
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 up to 60 m (200 ft)
In the case of forward c/g positions and stick fully pulled back, the powered
sailplane just continues to fly in a mushed condition without the nose or wing
dropping.
Normal flying attitude is regained by easing the stick forward.
October 2011
Revision --
appr. 4.5.3.4
