ORIGINAL: HighPlains
7.8 x 12 prop and 30,000 rpm sounds extremely optimistic. What are the other prop sizes you have to test?
I don't know about that just yet... It won't turn up to 30K on the ground, that's for sure. But I don't think that's what he's trying to do either. Out of a vertical 1000' dive however, things change. If he can get it to pipe up as he enters his dive, and keep it on the pipe just long enough to make it through the speed traps, he may have a winner.
And anyway, I don't think this is his first shot at this... so it is not unlikely he kinda knows where he's going with this.