RE: Electric Weston Magnum video
Saw that vidio somewhere else eletric flight forum i think
From memory jhvent time to verify it with motor calc or similarTo get 220 mph at 100% prop efiency with a 9 inch pitch prop I think you need some 35K
alowing for normal 70% rule that reguires closer to 45 k RPM
I figure realy with a 40 mph folowing tailwind and down wind dive doing real speed in the air of 180mph and thats the 220 mph explained
Balsaeater