That's what I thought too. But this thing is scary, not the speed itself, but if this airframe will hold up. I'm only getting up to 1/3 throttle and not getting the rpm up enough to keep it from loading up. It is plenty fast at 1/3. Not sure 126" model like this will take that kind of beating. Any RPM ranges with those props? I know I need to keep it above 6k, but I hope to get a comparison of RPM/prop selection before I make the change.