im working on a custom build using 4 400mm carbon fiber EDF's and trying to choose the right Kv range to turn these monsters. inrunner or outrunner? im not too worried about battery options as it will be powered by a kerosene microturbine/generator set and a voltage regulator (and a small lipo pack to start that). what i am worried about is overheating due to maxing the motors load (turning too slow) or over powering it which could also lower the life of the motor. i was thinking about using dynamite's fuse 9700Kv inrunners but that might not be enough power. any suggestions? i will know more about the impellers weight once it is made but it will consist of a milled aluminum hub with carbon fiber blades estimated weight will be about 150-200g.