As you can see in the movie I got 12000rpm with this 2cell lipo battery charged up to 7.58v. Thats a good result so far. This will produce 60grams of thrust per motor. Giving me 180grams of tot thrust. And that should be enough to fly this plane as a trainer in no or low wind conditions.
But we would like to have even more power. Just to fly it like a sportsplane or just to add more weigth like an onboard camera or an autopilot board. Testing continues.