Calidus
Variable Pitch Propeller - IVO
AutoGyro_POH_Calidus Revision 4.0 – Issue Date 17.JAN.2019 9-1 - 6
1. Propeller runs to fully coarse and stops. (RPM will decrease and MAP will rise. Reduce
power if needed, to stay within MAP limits)
Continue flight with careful monitoring or if in any doubt make a precautionary landing.
WARNING!
The climb rate will be reduced to 250fpm minimum!
At fully coarse, the engine will be sustaining increased load at low rpm. Take care
as if power is set to idle, it could result in an engine stall.
2. Propeller runs to fully fine and stops. (RPM will increase and propeller pitch will stop in
full FINE position. Reduce power if needed, to stay within RPM limits).
Continue flight with careful monitoring or if in any doubt make a precautionary landing. Note
that fully fine could result in engine speed over-run if taken to max power in level or
descending flight! Set engine 5000rpm maximum at 80mph.
3. Propeller will not make pitch change (determined by no audible effect from engine when
at constant power setting). Probable cause: failed propeller mechanism, end-position
controller or cable fault. Follow the appropriate actions in 1. or 2. above and consider the
further scenarios in the table below:
Before take-off Do not take-off
During take-off and climb
Try to keep climbing to a safe altitude, return to
the airfield and land. If the aircraft does not
climb, maintain altitude and plan to return in a
flat curve.
During cruise flight
Depending on the prop position, it should be
possible to find a speed and RPM to continue
the flight to the next possible landing area.
Depending on the prop position your descent
will look different and a go around is probably
not possible.
During descent
Depending on the prop position (in case of
coarse pitch), your descent will look different
and a go around will probably not be possible.
During Landing
Continue approach as planned. If the prop
changes to coarse pitch and the landing looks
too long, keep in mind to cut the engine.
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