Abstract: A fixed-wing VTOL aircraft features a forward-swept wing configuration coupled with a tripod arrangement of the engines (two forward, one rear), a forward-swept empennage or tail assembly, and a forward canard. The engines and wings/empennage are located relative to each other such that the engine outlet nozzles, which pivot downwardly to provide lift-off thrust, are minimally covered by the wings/empennage, if at all. The wings and empennage may include lifting fans to supplement lift and provide pitch and/or roll control.
Abstract: To optimize the performance of a canard airplane with an engine in front, the canard is mounted forward of its location in existing canard airplanes. Specifically, the canard is located with its leading edge significantly ahead of the firewall. This allows the canard to be mounted higher on the fuselage, providing aerodynamic improvements. The engine may be mounted to, or near, the canard spar, simplifying the structure. The added leverage of the further-forward canard allows the wing to be moved forward also. This makes possible a low wing under the occupants of the airplane. Efficient loading of the lifting surfaces is maintained by using a high aspect ratio canard.
Abstract: The present invention is a laminar supersonic transport aircraft having a reverse delta wing located between a forward section and a distal end of the aircraft, a set of jet engines superposed on another set of jet engines, a stabilizing vertical tail located near the distal end of the aircraft, a stabilizing canard surface located near the forward section of said aircraft. Also, a laminar flow control device can be incorporated within the wing. The reverse delta aerodynamic wing has a basic reverse delta wing portion bounded by a leading edge and by a pair of trailing edges extending from respective ends of the leading edge toward a trailing apex point and respective span-wise wing extensions in a natural laminar boundary layer wing region extending chordwise from the leading edge by a fraction of the chordlength of the wing and extending span-wise from opposing sides of said wing.
Type:
Grant
Filed:
February 21, 1997
Date of Patent:
December 1, 1998
Assignee:
Northrop Grumman Coporation
Inventors:
Heinz Adolf Gerhardt, James Franklin Kerswell, Richard Thomas Priestley, Berry Thomas Gibson