Jetts, you're right, a trainer will only go so fast, but the alpha is actually one of the cleanest trainers out there, and it can get going at a decent clip a little work, espeically compared to an LT-40, for example.

One trick on the airframe that might help go a bit faster is to reflex the ailerons slightly and move the CG back a tad. I don't know if it would be noticeable though, as I haven't tried it on an Alpha.

Minn, you're right, I was assuming he had the Evo "trainer power system", since he also mentioned an Alpha airplane. Very few people realize there IS a difference between the Evo "TPS" and the Evo .46. I didn't know there was a difference until recently. The TPS is frequently called a .46, even though it's actually a .45, and not quite the same enigne.

What I want to know is, why did the Evo guys bother making a .45 and a .46 seperately? What are the differences between the TPS and the .46 besides the flywheel and a small amount of displacement? Are they ported differently? I assume they use the same stroke, with the .46 just being bored out a bit more, but I haven't actually looked that up.

A couple of guys at my field run a 10x6 on the Evo TPS, which I still think is too small a prop, and they could get better performance from an 11x6 or 11x5, but it does fly well on the 10x6 and it won't hurt the engine, of course.

Oh, removing the baffle will make the engine louder in two ways. First, you'll be making the muffler less effective, and second, the higher RPMS will mean more prop noise.