Airplane with variable-incidence wing

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5086993
SERIAL NO

07308655

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The craft is for hovering flight, vertical takeoff and landing, and horizontal forward flight. It has a tail-sitting fuselage and a ducted fan mounted to the fuselage aft to provide propulsion in both (a) hovering and vertical flight and (b) horizontal forward flight. At each side is a floating wing, supported from the fuselage for passive rotation (or an actuator-controlled optimized emulation of such rotation) about a spanwise axis, to give lift in forward flight. The fuselage attitude varies between vertical in hovering and vertical flight, and generally horizontal in forward flight. Preferably the fuselage is not articulated; there is just one fan, the sole source of propulsion, rotating about only an axis parallel to the fuselage; and thrust-vectoring control vanes operate aft of the fan. Preferably at each side a small, nonrotating wing segment is fixed to the fuselage, and the floating wing defines--along its trailing portions--a corner notch or slot near the fuselage; forward portions of the fixed wing segment are within this notch. Preferably the spanwise axis is along a surface of the floating wing, and a long hinge supports that wing from the fixed wing segment, within the notch. During vertical and transitional flight characteristically the leading edge of the floating wing is down relative to the fuselage axis.

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Patent Owner(s)

Patent OwnerAddress
FREEWING AERIAL ROBOTICS CORPORATIONENGINEERING RESEARCH CENTER BLDG 335 UNIVERSITY OF MARYLAND COLLEGE PARK MD 20742

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wainfan, Barnaby Long Beach, CA 3 53

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