.65 rigger wants to fly

[avbrando]

dad and i run an older 4 bolt silver head cmb rigger that is kind of a pain to get going, but once it does, LOOK OUT.

on the first run of this year it seemed ok for a bit then decided to take flight at part throttle twice. what could have changed to have caused a boat that used to be glued to the water at 80+mph to now flipping at even low speeds?

 

[carlnoki]

does the boat actually fly up from the front of the boat like taking off from a run way?

 

[avbrando]

does the boat actually fly up from the front of the boat like taking off from a run way?

rep, the front comes up first, then it blows over.

 

[carlnoki]

have you ever had teh thing torn down for any reason?

did you write down teh settings you had if you DID tear it down?

are you SURE you are running the SAME prop you did before it starting the Wright Brothers Dance?

and just for thought, is teh motor running FASTER than it did before?

just a few questions that need to be answered.

carl