| 摘要 |
An aircraft comprised of a pair of spaced apart interconnected air-frame members and a cargo compartment supported therewithin is provided with a plurality of expansible airfoils mounted for peripheral movement around the air-frame members as driven by a motor and associated drive, movement of the airfoils along the frontmost perimeters of the air-frame members providing the aircraft with forward thrust, and movement thereof along the uppermost perimeters of the air-frame members accentuating the lift provided by the airfoils. Structure associated with the motor and drive and with the mounting of the airfoils for peripheral movement around the air-frame members serves to controllably and elevationally alter the plano-convex profiles of the airfoils as they are driven along the uppermost and frontmost perimeters and to thus vary the lift and forward thrust provided respectively thereby, optimum elevational expansion of the airfoils as they are driven along the uppermost perimeters of the air-frame members serving to maximize the lift of the aircraft, and optimum elevational expansion thereof as they are driven along the frontmost perimeters serving to maximize the forward thrust of the aircraft.
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