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Wednesday, 3 June 2026

Prop - Pitch Motor Change

On the first few flights the prop controller would go into current limit.  I contacted Airmaster and they had me check everything... blades off, every connection, brushes, slip ring, etc.  The only thing I found that was suspect is one brush was angled and had been wearing unevenly.  So those were changed.  Flew again, same problem.

The prop would go into current limit only during large changes (mode changes) in the course direction.  IE going from Takeoff to Climb, or Climb to Cruise.

Then we increased the current limit from 4 amps to 5.5 amps.  That fixed the problem.  However, Airmaster sent me a new motor with higher gearing, plus a new motor cap to accomodate the larger motor.



Tested on the ground... all good.  Fine, course and feather pitch stops all work fine.

Next is flight test...

All is AOK.  Have had zero problems since changing the motor.  Thank you Airmaster!

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