Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1981-10-30
1984-02-21
Blix, Trygve M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244113, 244201, B64C 348, B64C 932
Patent
active
044325169
ABSTRACT:
The present variable airfoil assembly has a fixed airfoil member with a shallow recess in the top in which an adjustable airfoil member is seated snugly, when lowered, to present a convex top surface which merges smoothly with the top surface on the fixed airfoil member in front and behind. When the adjustable airfoil member is raised, the fixed airfoil member presents a top surface below it which is continuous for most of its extent to minimize air turbulence. Reinforcing ribs on the adjustable airfoil member extend down through longitudinal gaps in the top of the fixed airfoil member and are coupled to cylinder-and-piston units for raising and lowering the adjustable airfoil member. A transverse gap extending across the top of the nose of the fixed airfoil member passes adjustable filler pieces which can extend up between the nose and the front edge of the adjustable airfoil member when the latter is raised or be retracted down to permit air to flow under the adjustable airfoil member for braking purposes.
REFERENCES:
patent: 1549122 (1925-08-01), Lanier
patent: 1745677 (1930-02-01), Hopper
patent: 1749021 (1930-03-01), Davis
patent: 1818309 (1931-08-01), DeVillard
patent: 1848368 (1932-03-01), McMaster
patent: 1881159 (1932-10-01), Apolloniou et al.
patent: 2288750 (1942-07-01), Seeman
patent: 2364006 (1944-11-01), Smith
patent: 3716209 (1973-02-01), Pierce
patent: 4182503 (1980-01-01), Muscatell
Blix Trygve M.
Corl Rodney
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