Brushless - Cogging?

[Guy]

Hi

On the weekend, I had some rather bad luck with two brushless combos. It's the second one that I can't work out.

Basically, the motor seems to cut in and out momentarily when on full throttle or it seems quite sluggish, without any punch. Sometimes, it won't run at all, even after resting/cooling for a while.

Does anyone have any ideas? Could it be overheating or geared too high, or perhaps radio interference?

It is a Nosram Storm 2 Star brushless motor that came as part of a combo with a Nosram speedo and I usually run it in my XXXT, but had to transfer it to my ZX5 to make the final (that usually runs on an LRP Vector 3 Star, but the rotor worked its way free!).

Any ideas would be a great help.

Guy.

PS I have received conflicting advice from the Nosram manual and my local model shop on gearing, so any advice on that would also be good both for the Nosram in the XXXT and the LRP in the ZX5.