edible_engine.....What if you run gears that are too low for a powerful engine? You don't get traction....all you do is torch the tires. What I need to do is find the lowest "gear" that will still let me hook up.

barryb-RCU.....check out what it says under my name. No matter what I do, there's always something telling me that it can be a little bit better.

seanychen.....Come to think of it, I don't need the throttle response, what I need is more air moving over the surfaces. Thanks for the explanation of velocity vs. static thrust. It makes perfect sense now.

I had a chance to try the 15x8 today. With the less-than-ideal conditions, it's kind of hard to determine whether or not I like it yet. There was a 10-15mph wind straight down the runway. Coupled with this plane's tendency to float and a steep pitch prop, I didn't think the plane would ever come down. The vertical performance is awesome. The plane is like a rocket, straight up forever. Couldn't tell a real difference in thrust, only that the plane had much more momentum to get through manuevers. One example is that on a fast vertical upline, I could chop the throttle, glide vertical for 20 feet, outside snap, tailslide, then catch it with a hover. The engine was idleing through the entire sequence, that is until the hover, of course. There is no way the 16x4 would give me the vertical airspeed to get through all those manuevers. No, I'm not trying to fly pattern, but I wanted to see what increased airspeed could do in terms of 3D. Didn't have a chance to get low and slow, as my exhaust pipe fell out mid-flight (dang weak YS heads!)