SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2cM
FLIGHT MANUAL
Extending the prop, starting the engine in flight
1. With the prop extended and engine off, the rate of descent is approx.
2.3 m/s (453 fpm) at a speed of 105 km/h (57 kt, 65 mph), resulting in a glide
ratio of only about 13 : 1 – contrary to the best L/D of 49 : 1 in clean
configuration (prop retracted).
Therefore the engine should only be restarted over terrain suitable for an off-
field landing and that, if possible, n o t below 300 m (984 ft) AGL.
But extending the prop to restart the engine at a height of 200 m (656 ft) AGL
on the down-wind leg to a suitable landing field is safer then e.g. restarting it
at 500 m (1640 ft) AGL above a forest or the like.
Should a flight be planned over long distance without any acceptable landing
fields, the prop should be extended at a height giving sufficient time for all
emergency procedures and, if necessary, for re-retracting the propeller.
2. Starting procedures - see also check list on page 4.5.1.5
•
Power plant master switch “ON”
•
Push prop arresting device handle forward
•
Check that fuel shut-off valve is open
•
Set throttle 1/4 open
•
Switch ASI to pitot head cone
•
Extend prop at a speed of about 90 to 100 km/h (49-54 kt, 56-62 mph)
until green signal comes on
•
Ignition “ON”
•
Actuate primer by squeezing the rubber bulb 3 times
(only if engine is cold)
•
Depress starter button until engine has definitely fired
The loss of height from extending the propeller to the moment the engine
is running is about 40 to 50 m (131-164ft) and the time required for this
procedure is approx. 35 to 40 seconds.
November
2003
LBA-app.
Revision
--
4.5.3.9
Summary of Contents for Ventus-2cM
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