Bought this as a replacement for my v911 pro and I am also building my own upgraded v911 only thing I don't understand is every forum says they act like a fan well the one's I have do have slanted blades but it looks like they would be pulling air up not pushing down but maybe i'm wrong my v911 spins clockwise looks like the gear should spin counterclockwise to produce lift. It would be great if somebody could correct me I would love it but for now I'm just curious. I might get a set of scales and take blades off and see if the gear produces lift or decreases lift.