SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
Extending / Retracting the propeller in spite of a defective electronic control unit
The emergency extension/retraction switch is accessible by tilting up its red guard
(located at the base of the front instrument panel).
With the key of this switch held up at “EXTD”, the propeller 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).
Therefore the final position of the extended propeller pylon has to be checked
visual or can be recognized when the 15 A circuit breaker is released.
To start the engine (by following the standard procedure), the emergency system
is not required.
NOTE:
In the extreme “down” position the spindle is stopped by the limit
switch “retracted” and is shown by the green signal.
Failure of the engine control
The engine SOLO 2625-02i is developed with a redundancy system, which has to
be manually activated if the normal engine control system breaks down. This
system consists of a simple electronic device programmed with a fixed engine
operating map and controls two additional injection valves. Under operation with
the redundancy system the engine power will be decreased because the adaption
of the engine operation map to altitude and temperature is missing. The engine
operational data and limitations remain.
Warning:
Self-launch is not approved under operation withthe redundancy system
Failure of the electric power supply for the engine
A defect of the electric power supply is displayed with an error message on the
control unit MCU II.
The electric power for the engine control and fuel injection will then be only provided
by the engine battery. As soon as the engine battery capacity is depleted the engine
will stop running and the retraction of the engine is no more possible.
For this reason, as soon as a failure of the electric power supply is indicated, quickly
stop and retract the engine.
October 2011
Revision --
appr. 3.7.3
