SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3M „Performance“
FLIGHT MANUAL
March 2019
CS 22
Revision –
4.5.6.1
4.5.6
Stopping Engine and Retracting Powerplant
See also the following checklist:
a) Procedure for stopping and retracting the power plant in automatic mode
(normal operation)
o
Carry out the cooling run with approx. 20% of power until the indicated
cooling water temperature has dropped to below 60°C.
o
Speed 95-100 km/h (51-54 kt, 59-62 mph) and flap po2
o
Ignition OFF
o
When the engine has stopped, the aerodynamic forces causes the
propeller to slowly turn into the retracted position.
o
As soon as the propeller stopps outside the retraction position, the
propeller stopper engages as a stop.
o
The movement of the propeller close to the retraction position can be
accelerated by pressing the starter button (electronically controlled pulse
operation of the starter).
Caution:
The starter control interrupts the impulse operation as soon as the
propeller is approx. 15° in front of the retraction position.
The further movement of the propeller to the retraction position is only
done by the aerodynamic forces, the rotational speed of the propeller is
limited by the propeller brake. To ensure that this process can be
carried out reliably, the specified airspeed range must be met.
o
When the propeller has reached the retraction position (power plant
operating unit unit shows
) the powerplant retracts automatically.
The powerplant retracts within about 15 seconds, but the entire process
from stopping the engine to the moment the propeller has fully retracted
takes about 90 seconds and consumes a height of about 100 m (328 ft).
