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Old Sep 16, 2012, 02:42 PM
RicksterRC is offline
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Quote:
Originally Posted by PurpleShark View Post
One of my (two) V911 developed a strange issue a few flights after replacing the main motor (to a bravo SX). After keeping it in high rpm for a few second the main motor kinda "snaps":
http://www.youtube.com/watch?v=BqSPuZ75xCk

Tried replacing the main gear, but it didn't help...
Thanks for helping.
Earlier in the thread, some reported motor "snatching" when overheated.
Sometimes a single drop oil light machine oil at the gear end bearing helped.

I did some motor life testing between a stock V911 and Bravo SX.

The testing was apparently flawed because I ran them from fixed voltage, but with no load.
They quickly heated up, even at relatively low voltage.

The Bravo SX, defintely "snatched" badly as soon as it heated up at all.

Both motors would "snatch" of the shell was squeezed with your fingers even a tiny bit of pressure.

Make sure nothing about the mounting of the motor is causing any pinching of the case.

After the testing, I diassembled both motors.
It was obvious that the Bravo SX windings had been rubbing the inside of the motor shell. All the shellac was worn off the windings in numerous spots.
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