DG Flugzeugbau GmbH
Flight manual DG-500M
If option level II is installed, it is possible to turn the propeller into the retraction
position by pressing the starter button, if the propeller was not stopped already
in the retraction position (only possible in the air).
It is strongly recommended to switch off this optional automatic from time to
time, to train the normal engine retraction procedure!
Note: With the factory approved radio installation set (Option) the radio will be
switched automatically from normal flight to powered flight mode when
retracting and extending the engine, see section 7.16.2.
4.5.6.2 Extension and starting the engine in flight
1. With the engine extended but not running the rate of sink at 90 km/h
(49 kts) increases to 1.5 m/sec. (300 ft/min.). This is a glide angle of
17! Therefore restarting the engine should only be done over landable
terrain and not below 500 m (1650 ft) above ground. But it is better to
restart the engine at 200 m (660 ft) over a landable field rather than at
500 m (1650 ft) over a forest or unlandable scrub. Should a flight be
conducted over a wide expanse of unlandable terrain, the engine
should then be restarted at 1000 m (3300 ft) above ground level so
that if the engine does not start, all the emergency starting procedures
can be followed in peace including retraction of the engine if
necessary.
2. In a normal restarting situation the loss of altitude from starting the
extension procedure until the engine is running is only about 20 m
(70 ft).
3. Extension: Fly at 90 km/h (49 kts) with flaps set at 10°. Main-switch
on. Switch on DEI to "Avionik + engine". Check if the red handle of
the manual extension-retraction switch on the right side console of the
front cockpit is switched to the down position.
Check if the primer switch is in the "automatic" position. Switch on
ignition and press the starter button. The engine will extend by itself
and the starter motor will start the engine as soon as the powerplant is
extended. When the engine fires apply more throttle. In case of
starting problems see sect.4.5.1.2.
Issued: April 1997 App. 4.21
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