you're concerned about drag... but if it's the same as a plane in "hover mode" why would it be any different? my concept... which is sketched out though I take it not very clearly... is to have the "ailerons" near the top of the craft directly under the motor... while at the base of the model... you would have an "elevator" and a "rudder" which would tilt the entire craft... thus directing the thrust of the motor in any direction you wish... I've never flown a 3d plane... is it necessary to modulate the ailerons when shifting from hover to virtical flight?