Originally Posted by doctorz
My poor wee beastie is flying really badly at the moment. I havent taken it out for a few months - but today it was chugging along.
Just not enough power - can to a vertical climb - but only just. i am sure it used to be a lot better!
I am ordering some new batts just incase - but spinning the rotor when it is at rest by hand... it is very jerky. Is that normal? I have had a few wee prangs in the past - I am worried that i have done something to it.
New batts is good. Jerky rotor OK. Mine's like that and so is my other brushless KV2500 on Sbach. I believe the term is "cogging". I believe it's the magnets and winding doing their thing.