ORIGINAL: wflite
Was using futuba 9254 tail servo, now I am using the ds650 with little or no change. I have tried holding the rotor head and turning the tail rotor. It take a. Lot of pressure to make the belt slip. I don't thing this is the problem?
Is it possible for you to post a video of the problem you are having and maybe some close-up pictures of the mechanical set-up ?
If i had your helicopter in front of me i would be able to diagnose the problem in half an hour, but it's very difficult to do it from a few posts on a forum as i'm sure you can appreciate.
cheers
john