Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1997-10-16
2000-01-04
Barefoot, Galen I.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244 75R, B64C 916
Patent
active
060100974
ABSTRACT:
A wing flap structure includes a wing, a flap, and a hinge mechanism connecting the wing and the flap. The hinge mechanism includes first and second hinge links connected between the wing and the flap. The pivot points for the hinge links are oriented so that as the flap moves away from the wing, the flap moves in a circular arc path relative to the wing. The first hinge link includes a first elongate link having a first end rotatably connected to the wing. The second hinge link includes a second elongate link having a first end rotatably connected to the second end of the first link, and having a second end rotatably connected to the flap. The rotatable connections have axes of rotation that meet at a point below the wing to define an axis of rotation for the circular arc of the flap. The hinge mechanism is contained substantially along the circular arc of the flap as the flap is extended and retracted. A drive mechanism is connected to the wing and to the flap for moving the flap through a circular arc. The drive mechanism is also contained substantially along the circular arc path of the flap. The drive mechanism is powered by a linear actuator. The drive mechanism controls the pivot points of the hinge to ensure that the flap follows a circular arc as it extends, and provides lateral stability for the structure.
REFERENCES:
patent: 2158676 (1939-05-01), Engelhardt
patent: 2218114 (1940-10-01), Kunze
patent: 2405728 (1946-08-01), Zap
Anderson Terry J.
Barefoot Galen I.
Hoch Jr. Karl J.
Northrop Grumman Corporation
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