Alright,

here is the video of the GP Revolver at 160 mph - level flight. I was under the impression he had approached 200 with a 10s setup.

The thing is, the revolver is a "speed" design with a 59" span, thin airfoil and a high wing loading of up to 29 oz/sq ft. Specs call for a 55 size engine. People have put 91's in it and say they can't quite match the 10s electric setup.

I've been wondering actually whether 6s will do it (if it can be done). It seems to me that a very high kV motor (DF type) with a low drag prop on it (maybe 10" max diameter) and something more akin to 8s might be needed but I'm just speculating. Someone like Andy who is knowledgeable with electric setups might be able to better configure the e-power train but high cell count and low capacity (just to set the record) seems paramount. That wing (and stab) is also going to be crucial. The P7 should have less form drag than the Revolver.

This would be info to just start getting one's hands wet with the speed record attempt:

http://en.wikipedia.org/wiki/Parasitic_drag

That finish is going to be paramount too.

David.