Subsonic aircraft with backswept wings and movable wing tip winglets
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United States of America Patent
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Feb 12, 2002
Issued Date -
N/A
app pub date -
Jun 12, 2000
filing date -
Jun 12, 1999
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Abstract
A subsonic aircraft having backswept lifting wings is equipped with individually rotatable winglets at the wing tips thereof, in order to reduce drag during cruise flight, to minimize the dangers posed by wing tip vortices to following aircraft during take-off and landing, and to minimize the total wingspan during ground operations, with respective different positions of the winglets. A streamline-shaped rotation body made up of at least two individually rotatably supported rotation segments is mounted on the wing tip of each lifting wing. A respective winglet is mounted on each respective rotation segment. Each rotation segment with its associated winglet is individually rotatable about a rotation axis of the rotation body extending substantially parallel to the aircraft lengthwise axis. Thereby, each winglet is individually pivotable to any selected pivot angle relative to a horizontal plane extending through the rotation axis. Each winglet and its associated rotation segment is rotatable through an angular range between maximum end limits of at least +90.degree. (vertically upward) and at least -90.degree. (vertically downward) relative to the horizontal plane.
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