Lehner 3080 / 8 Brushless Motor ? fault

[What's_nitro?]

It's the controller that's the problem. Motors are (for the most part) passive devices. Something like this where the motor stops at low speed and wont start sounds like, as others have suggested, a commutation problem, or, start power is too low. I would bank on the latter since you can stop it by hand at low speed. It could be a radio issue, IDK maybe the endpoints the controller was programmed to became corrupted so it's missing a few steps on the low end (in the ESC, not your Tx). I'm assuming the motor has no binding at all at any point, and there are no shorts in it's windings.

[mohanjude]

thanks for the reply - I will give the motor a try with the other BK controller (36.150). I know the schulze is not faulty as it runs other multi pole motors without any issues. I think the Lehner motor and this Schulze controller have some compatibilty issues. I can only assume that the previous BK controller caught fire and destroyed itself due to bad luck rather than a motor problem.

That ESC was rated for 150 amps and 42 volts. Running it on Enerland 25C 10S packs 6000ma should not have been a limiting factor as clearly the lipos can supply 150amps. However something went wrong and controller caught fire in 2 mins after trying to pull away. I am just worried that my remaining BK controller will catch fire if I cannot isolate the reason for the controllers spontaneous combustion. Luckily I managed to save the lipos, receivers - the aluminium roll cage / frame didn't do that well.

[_paralyzed_]

IMO motors either work or they don't, of course there are exceptions, but for the most part I believe this to be true. I know this is a super big super expensive setup, if this was happening to me I would start with the basics as I stated before, a smaller pinion or more voltage. If neither helps at all I would think it's a motor problem.