Yuneec q500 motor upgrade?

[msyarbrough]

Hello everyone, I had one of my motors apparently burn up while doing a bench test on a Yuneec q500. The other three had smoked previously, but a spray with electrical contact cleaner seem to clear that up. I have thought about upgrading the motors instead of simply trying to replace them with some used ones. I have a donor drone that I can get motors from, but I am worried that another set of old motors will do the same. Has anyone replacing these with aftermarket motors, I know they are 4234 700 KV but have not had much luck finding them.

 

[WTFDproject]

Hello everyone, I had one of my motors apparently burn up while doing a bench test on a Yuneec q500. The other three had smoked previously, but a spray with electrical contact cleaner seem to clear that up. I have thought about upgrading the motors instead of simply trying to replace them with some used ones. I have a donor drone that I can get motors from, but I am worried that another set of old motors will do the same. Has anyone replacing these with aftermarket motors, I know they are 4234 700 KV but have not had much luck finding them.

"I had one of my motors apparently burn up while doing a bench test on a Yuneec q500. The other three had smoked previously,"
Smoked motors are pretty rare. Smoked ESCs (which are mounted right under the motor) are fairly common.
Are you certain it is the motors that are failing?

 

[msyarbrough]

"I had one of my motors apparently burn up while doing a bench test on a Yuneec q500. The other three had smoked previously,"
Smoked motors are pretty rare. Smoked ESCs (which are mounted right under the motor) are fairly common.
Are you certain it is the motors that are failing?

You were right. Opened it up and it was cajun style, the magical blue smoke had been released.... So the big question is since I have a doner should I just replace the esc or should I replace the motor and esc and only have to splice or solder 3 wires or just replace the board.

 

[WTFDproject]

You were right. Opened it up and it was cajun style, the magical blue smoke had been released.... So the big question is since I have a doner should I just replace the esc or should I replace the motor and esc and only have to splice or solder 3 wires or just replace the board.

...since I have a doner should I just replace the esc or should I replace the motor and esc...
Only the ESC is bad. You can't the ESC out of the motor enclosure without unsoldering the wires between the ESC and the motor anyway.

 

[WTFDproject]

Also worth note. You can't fix the damaged ESC boards. The blown-out components you see are the mofettes. They are the obvious damage, but they are NOT the problem. They are the victims. If you replace them, the new ones will get blown out by the timing issue that is the real problem.

Also note there are "Front ESCs" (black and white LED wires) and "Rear ESCs" (black and red LED wires).
I've swapped them a few times, but it seems to create some flight instability.