SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2c
FLIGHT MANUAL
3.9 Other
emergencies
Flying with uneven water ballast
If, on dumping water ballast, the wing tanks are emptying unevenly or only on
one side – 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 kt, 6 mph) and the pilot must be prepared for the 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 aircraft is still
controllable to at least some extent by using its flaps for longitudinal control:
Flap lever pulled back:
= slower
Flap lever pushed forward:
= faster
This may for example allow the pilot to move over to a more favourable
bail-out aera.
Loss of directional control
Should a rudder control cable break in flight, the aircraft may quickly start
yawing and rolling. An ensuing spiral dive (in 18 m configuration only),
however, may possible be avoided by resetting the flaps immediately at “0”.
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.
November
2003
LBA-app.
Revision --
3.9.1