Hi Bill,

I have this Tomahawk & really enjoy it. As you know, the instruction manual doesn't indicate the amount of flap defection. From my experience, it doesn't require much at all. In fact, I hardly ever use the flaps. I would think that 30 degrees or so is ample.

I don't fly mine very often, only because my main club's field runway is grass. The Tomahawk is awesome on asphalt.! Very scale-like! It's surprisingly easy to fly. At first I was intimidated by the narrow wing cord and T-tail, but those turned out to be non-issues. (However, be sure to heed the advice of the comments above in this thread.)

Hope this helps!

Patrick