Copyright of RotorSport UK Ltd
Document number RSUK0060
Page 95 of 101 Page issue 5.1, dated 10.06.14
The logic table for operation of the propeller controller is:
Both LEDS off
Propeller is not at an end position and no pitch change
command active
Upper LED blinking
Propeller changing pitch to FINE
Lower LED blinking
Propeller changing pitch to COARSE
Upper LED steady
ON
End position FINE reached and electronic pitch inhibit FINE
activated*
Lower LED steady
ON
End position COARSE reached and electronic pitch change
inhibit COARSE activated*
Both LEDS flashing
fast
Actuating motor does not work despite rocker switch
activation.
Possible defects, e.g. brushes worn, cable break.**
*Electronic pitch change inhibit is deactivated after selecting pitch change in opposite direction for at
least 1 second
**Indication can only be reset by switching the master switch temporarily to OFF and then back to ON.
In order to avoid pilot distraction, indication of a possible defect is retriggered after another activation of
the rocker switch
9.4. MANIFOLD ABSOLUTE PRESSURE INDICATIONS
The analogue manifold absolute pressure gauge (MAP) has perimeter markings to show
normal, warning and limit values in the conventional colours
The alternative combined digital manifold absolute pressure gauge/digital engine RPM
gauge has a monochrome LCD display without marked limits.
9.5. CIRCUIT PROTECTION
The propeller controller is supplied from the propeller power supply (Fuse F9 25A).
9.6. PILOT TRAINING & EXPERIENCE
These notes assume that the pilot already has some experience of operating a variable
pitch propeller. The UK CAA strongly recommend pilots to undergo ’differences training’
before they are allowed to operate aircraft with variable pitch propellers.