Calidus
Variable Pitch Propeller - IVO
AutoGyro_POH_Calidus Revision 4.0 – Issue Date 17.JAN.2019 9-1 - 1
9-1 Variable Pitch Propeller - IVO
9-1.1 General
A variable pitch propeller (VPP) manufactured by IVO is available as optional equipment to
optimize the propeller efficiency, fuel consumption, and noise in all flight regimes and power
settings. This is achieved by changing the propeller blade pitch.
9-1.2 Limitations
No change to standard aircraft
9-1.3 Emergency Procedures
Proceed according to generic variable pitch propeller procedure provided in SECTION 3 for
the standard aircraft.
9-1.4 Normal Procedures
9-1.4.1 Set Propeller to FINE
In order to set the propeller to FINE for start-up, take-off and approach, use the following
procedure:
Press rocker in direction FINE (forward or top position), status indicator FINE flashes,
engine RPM increases
Keep rocker depressed until end position is reached (status indicator FINE steady on)
9-1.4.2 Adjust Propeller COARSE
Adjust propeller pitch and throttle to match engine RPM and manifold pressure
according to the power setting table (9-1.5)
CAUTION
When adjusting the propeller do not overtorque (i.e. too high MAP for given
RPM) the engine as this may lead to overloading, reduced life time or possible
damage.
NOTE
As a safety measure, the mechanical end stop in full COARSE position is
chosen to allow a residual climb rate of 1 m/s (250fpm) in standard atmospheric
conditions at sea level with maximum take-off weight.
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