Hmmmm. 300 sounds low to me I guess. I know my big gas engines for example my 5.8. When on the ground I can tach 6,900 rpm with a 26x10 and you can hear the engine pulling.

When I get in the air it sounds much crisper and the prop really starts to bark. That is why I was wondering if a 1000 was close. Seems like if it was within 300 or so it would almost sound the same on the ground.

But maybe a few hundred would make the difference?

Reason I am interested in this is because between all the fun flys I have been too I have heard from no difference to 1,500.