Odd brushless problem!

[DaveG28]

Had a weird problem with my electrics last weekend, and want to guage opinion on what might be the problem:

In two races last sunday within a couple of laps of the start, coming off one of the jumps my motor died. After a few seconds it started back up going very slowly, and worryingly from this point the throttle was stuck on at a low speed no matter what I did with the stick (including trying to brake ).

Both times when it was switched off and back on it then went fine again, through to the end of the race too without the problem coming back.

I am guessing it can't be thermalling because its happening near the start of runs, and because I wouldn't expect it to fix itself and then run a firther 3 or 4 min without problems.

Someone suggested sensor wire (didn't have spares with me) so am planning to swap sensor wires before running this next weekend, but it seems odd to me again that the problem didn't then replicate more often?

Anyone got any ideas on likely causes???

Kit I'm running is:

LRP TC Sphere 2007
LRP 4.5 can with 13mm sintered rotor inside
Spektrum micro receiver
running in 4wd class (an Aero)

Cheers all,

Dave

[sparrow.2]

Off the top of my head I'd have thought it might be a motor sensor problem. Either the sensor wire on the motor or the sensor in the motor itself. Other explanatiosn might be the capacitor being bust on the speedo or even dirt in the speedo or receiver...

Good luck

[SlowOne]

What was the steering servo doing at that time? Did it work normally?

[DaveG28]

Steering worked fine!

Is it possible I've damaged the sensor from the inside when changing rotors?

[DCM]

it sounds like the esc is losing site of the rotor position, so it waits till it finds this, this is a problem normally found in a sensoreless system, so the first thing I would check is the sensor lead. If that is all ok, you may want to pull the motor apart and check it and give it a good clean through....

[MattW]

When LRP speedo loses the sensor position, it just cuts the motor, and lights flash in the appropiate sequence. It will also usually emit a high pitch "squeel".

I'd be suspicions of the Spectrum reciever..........because i always am when i hear of a spectrum system playing up!!

[DCM]

if the steering had stopped to, I would of said Spektrum too, but it sounds like the LRP is just lost....