And its going to have to be within the stall speeds and do 200 knots?
The Harmon Rockets and high performance RV's and Lancairs will never make it into RAA any time soon either, they stall way to fast.
Something somewhere will have to be a compromise, but when it happens I bet it will cost you way more than your jab!
Lightning..... (USA built Esqual) is about a 150...or 158 Mile per hour machine. Not KNOTS. So from what I know of this plane, and I have flown one a couple of times with a 100HP Rotax which will TAS around 126knots, and up to 130knots, with a Electric constant speed prop. So a fixed pitch on a Jab engine, and trust me the Jab engine is not meant for anything other than a timber or composite fixed pitch, it will not be doing 158 knots.
Jabaless