I must have missed that some where. If you are using an 11x5 and can only turn 8700 you either don't have the motor tuned properly or there is something wrong with the motor. As you said above, call Hobbico and talk to them about it.

From reading your first post the other thing wrong was that you were taking off downwind. Even a wind of 2-3 mph can make it very hard to take off when are trying to take off with the wind.

I would look at the motor first, because I think that is where the majority of you problems are at.

Hope this helps

Ken