Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1980-11-12
1984-01-17
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244207, 244215, B64C 338, B64C 2104
Patent
active
044260547
ABSTRACT:
In an aircraft having a pair of engines mounted forwardly of the wing and discharging jet exhaust over the wing for augmented lift, a trailing edge flap is positioned directly behind each of the engines. Each flap has a stowed position for the cruise mode, a rearwardly and downwardly extending position for maximum deflection of the jet exhaust downwardly for STOL operation, and various intermediate positions. The upper aerodynamic surface of each flap is curved in a manner that the radius of curvature is a constant and uniform minimum at a forward portion of the flap and substantially greater at a rear portion of the flap. Each flap is moved from its stowed position, through intermediate positions to its fully deployed position in a manner that the upper aerodynamic surface of each flap forms a smooth and continuous extension of the fixed rear portion of the upper aerodynamic surface of the wing. Vortex generators are provided on the upper wing surfaces forward of flaps to generate vortices in the jet exhaust that travels over the upper surfaces of the flaps. This arrangement results in improved lift characteristics, reduced pitching moment with the flap in its deployed position, and improved operating characteristics.
REFERENCES:
patent: 3583660 (1971-06-01), Hurkamp et al.
patent: 3767140 (1973-10-01), Johnson
patent: 3971534 (1976-07-01), Grotz
patent: 3987983 (1976-10-01), Cole
patent: 4019696 (1977-04-01), Hirt et al.
patent: 4283029 (1981-08-01), Rudolph
May et al., "Aerodynamic Design of the Boeing YC14 Advanced Med. STOL Transport", AIAA No. 75-1015, 1975.
Bowden et al., "Propulsion Integration for a Hybrid Propulsive-Lift Sys.", SAE 740471, 1974.
Skavdahl et al., "Nozzle Development for the Upper Surface-Blown Jet Flap on the YC-14", SAE 740469, 1974.
Barefoot Galen L.
The Boeing Company
LandOfFree
Upper surface blown powered lift system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Upper surface blown powered lift system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upper surface blown powered lift system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-697596