If you were to attach a motor to an umbrella which way would you face it? With the umbrella in the up position and the prop facing down like it's diving, the motor would want to go forward but the air going into the umbrella would try to make the umbrella go up right? I would think that filling the umbrella with air would be the only way it would be controllable. If the motor were facing the climb position it would be pretty much uncontrollable right? Not that any umbrella flying around would be!

Any thoughts on this?