Like I said, it will fly the plane, but don't expect any exciting climb performance. Personally, If I was set on a two stroke for that plane, I would have put in a .61 , to .72. But my first choice would be a .70 to .91 four stroke, probably an .82 Saito if I had my choice and the $ to do it. But, you already have the engine, so go ahead and see if it suits you after you let someone maiden it. You can always put that TT .46 in a .40 sized plane later.