I am building a remote controlled toy vehicle, tricycle style powered by a single wheel. Weight is 150lbs drive tire is 24in dia when calculating torque needed and HP So far I have got acceleration as 7.04 ft/sec that times mass of 150lbs should give me torque, at 2112 ft lbs that times rpm of 300 is 633600 divided by 5252 should give me HP of 120.6? That seems high to me. I was thinking it would be closer to 10 HP... Did I do something wrong? Thanks for any help..