I was just wondering, that if you attached a fan in the front of an airplane wing, would it fly? If so, then how powerful would the fan need to be for a small model airplane, say 0.4m and 1kg, to fly/hover? Or if i made wearable wings, and i put them on, how powerful then would the fan have to be? Would a medium-strength leaf blower do the job? Or how about a 3m long 300kg plane?