Patent ID: 7377470

Claim:
A wireless-controlled airplane comprising: a flying unit having a body, a drive section installed on the body, a propulsion apparatus which generates a propulsive force when driven by the drive section, a main wing mounted on a top side of the body and comprising a plurality of overlapping wing elements which are movable relative to each other, an opening and closing mechanism which changes the relative positions of the wing elements so as to change the overlap of the wing elements and thereby change the effective area of the main wing and the speed of the flying unit, and a dropping apparatus for selectively holding and dropping a load downward; and an on-ground controller which is connected to the flying unit through a communication section and which controls the flying of the flying unit in accordance with operation by an operator; wherein the dropping apparatus includes a housing for holding a load, the housing being located over an opening in a bottom side of the body, opposite the top side, at least one door member for selectively opening and closing the opening in the bottom side of the body and a door drive for selectively moving the door member between open and closed positions; and wherein the wing elements are triangular in shape and each wing element has an apex connected at a common pivot point and wherein the movement of the wing elements relative to each other is a pivoting movement.