Hi Rick,
I too have had this issue on 2 occasions at about 35 hours and 140 hours -
worked OK on manual so no problem continuing to fly. On both occasions
Martin at Airmaster replaced the controller for me free of charge. After
the second failure I asked him whether there should be a switch in the prop
controller circuit to prevent any voltage surge during starting and he said
this is not considered necessary, but in view of the 2 failures it might be
a good idea in case there was some unusual issue with my installation. So I
put a switch in the circuit and keep it switched off during engine start and
stopping, and since then (now 380 hours) I have not had the problem again.
Regards,
Keith Hickling,
New Zealand.
-----Original Message-----
From: Rick Moss
Sent: Tuesday, December 30, 2014 8:01 AM
Subject: Europa-List: Airmaster constant speed unit issue
My 912S has an airmaster VP prop with warp drive blades and the airmaster
constant speed control unit. Both have around 100 hours on them.
Today upon takeoff fly flydat alerted me to an engine over speed (moderate;
never exceeded 5900rpm). I slowed down a little and reduced power to keep
the engine within limits, and climbed to altitude to consider the issue. The
CS unit was non-responsive, however switching to manual enabled me to alter
the pitch. Has anybody experienced this? I assume that if all connections
appear good, I simply need to replace the CS unit?
Rick
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