SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
b) Power plant extended
(only permissible with ignition switched OFF and in emergency case)
With power plant extended (and ignition OFF), the “Arcus M” can be landed
in a similar manner as in “clean configuration” (prop retracted).
However the disturbances of the extended power plant influence the airflow
around the fin, whereby a manipulation of the effectiveness of rudder and
elevator control is possible.
On approach it must be taken into account that the flight performance has
considerably deteriorated due to the extended power plant:
All-up weight (mass)
600 kg
1543 lb
800 kg
1764 lb
Approach speed
95 km/h
51 kts
59 mph
105 km/h
57 kts
65 mph
Rate of descent
Approx.
2.0 m/s
394 fpm
2.25 m/s
443 fpm
L/D approx.
13
13
However, the performance, though reduced, is sufficient to conduct
approaches with the same techniques as in "clean" configuration.
WARNING:
1. Be cautious when extending the airbrakes .
Due to the additional drag of the extended power plant, more
forward stick must be applied for maintaining the above
approach
speeds.
2. On stalling with extended power plant and ignition off,
the turbulent airflow produced by the propeller superimposes
the vibration in the controls, so that in this case no noticeable
stall warning exists.
NOTE:
Approaches and landings are normally conducted in
“clean configuration” (power plant retracted).
October 2011
Revision --
appr. 4.5.4.2
