Are all you number crunchers crazy or just plane stupid?
1. 280 HP turbo Mazda. Come on thats brake HP not constant. Nobody runs a car motor at top RPM all day, or even a half day.
2. The most efficent reduction known to man
will eat up 30% of your power. No brag just fact.
3. Props, why don't you find a run out Air Force unmaned recon pusher. Take the engine and prop, and use that. I am pertty shure those guys tried one or two things before they said Mazda's suck, Rotax rules.
And last but not least. Just build the Plane for now. And stop trying to reinvent the wheel.
I know this sounds testy, and you are correct. If you guys would just build, and shut up you could be a couple of chapters farther along than you are now.
Enough said. I gotta go fly my Lycoming powered,Catto proped Long someplace for a hamberger. I can afford to do this cause my engine and prop havent cost me all my hamburger money.
Best of luck on your projects:D