I dont think you will anywhere near 200 mph with a 28mm motor. You need to look at what it takes a gas plane to get it to 200 then find an electric motor that turns the same size prop for the same or less weight as the glow set up. a good motor choice and what I will be using on a QM plane is a Castle/Neu 1525 1.5Y CAR motor and a 200 amp speed control with a APC carbon 7.4x7.8 prop. I can spin that prop at 34,000 at 183 amps on a 6S pack