Am am a very avid funflyer. So I am not a begginer on this subject.

I agree w/ wgeffon. On the 4 stroke. I have a topcap arf. I started flying it with a YS 63 w/ 14x4 zinger. I flew it with that combo for months. I had to send my YS into the shop for some repair work, and I put on my TT 46 w/ baffle removed on my top ca

Don't get me wrong, the TT 46 is a great motor, but it can't compair against a YS 63.

I am playing w/ props but, w/ the TT46 it is now a differant airplane, its not a funfly anymore, it more of a sport flyer. I am not against 2 strokes at all I love them. But to me I like my top cap better w/ the YS63 than my TT 46. W/ the TT the plane isn't as responsive. since I have flown it both ways I know what I am talking about.

I have seen Paul Swanny, and Termagator, Propnutz1, fly their sudokois, knifes, gee whizbees w/ the irvine 53's and have great success, maybe because the 53 has more power. but w/ my topcap ARF and the TT46 is just doesn't have what I am looking for. If I didn't know how well the top cap flew w/ a YS 63 on it, I would sell the plane dirt cheap.

As we all know the topcap ARF weighs in over 5lbs, so maybe the TT46 and a lighter kit build topcap would do better.

I am not trying to say the TT46 and a topcap arf isn't a great combo, I am just saying in my opinion a topcap Arf w/ a YS 63 is a better combo.

Heres a picture of a guy w/ his topcap arf w/ a TT46. This is the picture that made up my mind to buy this combo. But my YS 63 was free, so I decided to slap it on my topcap cap,. So if this guy can do it w/ a TT 46, then I should be able to. But I can't do it w/ a TT 46, but I can hover it about eye level w/ a YS 63