SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
3.9
Other emergencies
Flying with uneven water ballast
If, on dumping water ballast, the wing tanks are emptying unevenly or on one side
only - which is recognized at lower speeds by having to apply opposite aileron for
normal flying attitude -entering a stall must be avoided.
When landing in this condition, the touch down speed must be increased by about
10 km/h (5 kts, 6 mph) and the pilot must be prepared for the powered sailplane to
veer off course as the heavier wing tends to drop somewhat sooner than normal
(apply opposite aileron).
Jammed elevator or flap control
While jammed flaps will just result in a "fixed profile flight behaviour",
a jammed elevator control is more serious.
The pilot, however, should take into consideration that the powered sailplane is
still controllable to at least some extent by using its flaps for longitudinal controls
Flap lever pulled back
=
slower
Flap lever pushed forward
=
faster
This may allow the pilot to move over to a more favourable bail-out area
or he may even avoid an emergency exit.
Loss of directional control
Should a rudder control cable break in flight, the powered sailplane may quickly
start yawing and rolling. An ensuing spiral dive, however, may possibly be avoided
by resetting the flaps immediately at “O".
If the yawing/rolling motion cannot be stopped by normal opposite aileron, then
briefly apply aileron in the direction of the roll so that the wing will level with the aid
of the adverse aileron yaw.
Shallow turns can also be effected by using only the aileron in the described
manner.
October 2011
Revision --
appr. 3.9.1
