Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1976-10-15
1978-06-06
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244113, 244209, B64C 2306
Patent
active
040931609
ABSTRACT:
An aircraft which produces a free vortex to provide the lift for takeoff and landing procedures has a single centrally mounted engine which supplies both the forward thrust to the aircraft and the spaced pumping action for strengthening and maintaining the free vortex. A shield on the aircraft causes the shedding of vorticity into a cavity-like region behind the shield. A vortex guiding duct extends transversely beneath the aircraft frame and has a pair of inlet openings at the ends of the cavity region. A thruster duct extends longitudinally centrally of the frame and communicates with the vortex duct. An engine is mounted in the thruster duct and supplies forward thrust for the aircraft while simultaneously pumping air from the ends of the cavity region through the vortex duct. This pumping action retains, augments and concentrates the vorticity and results in the formation of a generally circularly-shaped free vortex stretching transversely across the cavity region and through the vortex duct. Means are provided for retracting the shield simultaneously with the closing of the vortex duct inlets to extinguish the free vortex after the aircraft is in flight to enable the aircraft speed to be substantially increased.
REFERENCES:
patent: 2263992 (1941-11-01), Joyce
patent: 2480036 (1949-08-01), Lloyd et al.
patent: 2508288 (1950-05-01), Owner et al.
patent: 2619302 (1952-11-01), Loeding
patent: 2751168 (1956-06-01), Stalker
patent: 2841182 (1958-07-01), Sala
patent: 3193215 (1965-07-01), Dunham
patent: 3831885 (1974-08-01), Kasper
patent: 4017041 (1977-04-01), Nelson
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