I know. I was doing "cloud blenders" (where I would take the airplane up through a cloud and do a blender back out), I went from K/E spin into a blender, when only at half throttle the propellor tips started to go supersonic and then the muffler fell out.[:-] This was on a 27% H9 Edge. I never knew a Moki could get so loud.

When helis do that though, it gets so loud so fast that it will make you jump.[X(]