Originally Posted by locktite401
The VTRSIG Thunder Thrush is a very attractive 1/2A Vintage Team racer (1.5cc diesels) with everything in the right place except the CG. I've seen two built to the plan, both light and straight, and both were on the verge of being uncontrollable.
I'd suggest mounting the engine another 1/2" further forward.
I do have a high resolution pdf scan of the plan somewhere.
I built one to the plan and it flew beautifully. Motor was a PAW plain bearing CT.
so with a TBR a 1/4 to 1/2 would work well. Or move the wing back.