Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Reexamination Certificate
2005-05-17
2005-05-17
Luu, Teri Pham (Department: 3644)
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
C244S213000, C244S09000B, C244S123800
Reexamination Certificate
active
06892982
ABSTRACT:
An aircraft comprises first and second wings positioned on opposite sides of a longitudinal axis, a first forward opening control surface attached to an upper surface of the first wing, and a second forward opening control surface attached to an upper surface of the second wing, wherein each of the first and second hinges is canted with respect to a direction perpendicular to a longitudinal axis of the aircraft. A method of providing yaw control of an aircraft is also provided. The method comprises the steps of providing a first forward opening, canted spoiler in a top surface of a first wing of the aircraft, providing a second forward opening, canted spoiler in a top surface of a second wing of the aircraft, and operating the first and second spoilers differentially to create a yaw moment. The creation of yaw moments without any down force has application in sweptback wings where the tips are behind the center of gravity of the aircraft. The advantage is in reducing radar cross section over traditional (forward hinged, rearward opening) spoilers where there must be a spoiler on the bottom side to counter the down force created by the top spoiler.
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George Lucas, Star Wars, Snowspeeder, p. 1 of 1.
Holzen Stephen A
Lenart, Esq. Robert P.
Luu Teri Pham
Northrop Grumman Corporation
Pietragallo Bosick & Gordon
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