SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2cM
FLIGHT MANUAL
Extending / Retracting the propeller in spite of a defective engine control unit
The emergency extension/retraction switch is accessible after lifting the red
guard (protruding from the face of the tilt-up instrument panel).
With the key of this switch held up at “EXTD”, the pylon swings up – held down
at “RETR”, it swings down.
On lifting the red switch guard, automatically a bridging of the pylon limit switch
extended takes place (which normally cut off the spindle drive), requiring a
visual (on extension) recognition of the extreme position of the propeller pylon
or is reached when the 12 A fuse is released.
To start the engine (by following the standard procedure), the emergency
system is not required.
NOTE:
In the extreme “up” position of the propeller pylon, overloads on the
spindle drive – caused by releasing the key of the emergency switch
too late – will force the 12 A circuit breaker to trip.
In the extreme “down” position the spindle is stopped by the limit
witch “retracted” and is shown by the green signal.
Failure of the power plant’s electrical energy supply
Should this happen in flight, the ILEC engine control unit is out of function (all
signals out), but the engine continue running. It can be stopped though by
switching the ignition OFF and closing the fuel shut-off valve, thus avoiding that
its operating limits are exceeded inadvertently..
It should be noted, however, that a retraction of the power plant is no longer
possible – not even by actuating the emergency switch.
Should safety reasons require the use of the engine despite an inoperative
control unit (e.g. for reaching a suitable landing field), then a maximum speed
V
Y
of 100 km/h (54 kt, 62 mph) should not be exceeded.
Full throttle should only be applied in the case of an emergency.
November
2003
LBA-app.
Revision --
3.7.3
Summary of Contents for Ventus-2cM
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