Greetings,
I'm new to this sport. After flying 1/2A's, I built a Galaxy and Twister, then attended the Brodak Fly-inn 2003. The Twister flew great but it's in repair, I didn't check the fuel filter and the engine cut out on a wing-over. I'm flying the Galaxy with a newer Fox 35, about a quart through it now. My problem is when I do an inside loop the engine cut out on the bottom of the loop and I'm forced to land. I've sheared 4 needle valves. They is a 3 oz. uniflow stunt tank on it, the engine does not have the muffler on it. When I start the engine an hold plane and go through an outside loop the engine keeps going and when I simulate an insde loop the engine cuts out. Iv'e riched the needle valve out but it still cuts out, I've leaned it out too. Nothing seems to help. I did have the muffle on it before I stared to do loop but I took it off because the weight of the muffle and lead really shortened the glide. Is the tank bad or the engine still too new? The tank has three vents, one overflow straight down, one straight forward just over and behind the top of the engine cylinder and the fuel line comes out on an angle. The fuel just cuts off when the plane heads down.


Thanks