Ornithopter

Details Ornithopter Ornithopter

1997-04-14

1999-05-04

Jordan, Charles T.

Aeronautics and astronautics

Aircraft, heavier-than-air

Airplane and beating wing sustained

244 22, 244 72, 416 79, B64C 3302

Patent

active

058994084

ABSTRACT:
An ornithopter aircraft which flys by flapping a wing. The wing is flapped by a constructively sympathetically forced dampened harmonic oscillation induced in a leading edge strut which preferable is a single flexible steel rod extending the length of the wing. The wing releases the air on its upward recovery stroke by means of flexible flaps which uncover holes in a structural flexible web forming the wing. On the downward power stroke of the wing, the flaps sealingly abut and occlude the holes of the web, forming a wing surface relatively impermeable to the passage of air. An inner section of the wing, on both sides of the aircraft, where relatively little flapping motion displacement occurs, has a flexible layer which permanently covers and seals the holes of the web. This area of the wing generates lift during both upward and downward motion of the wing, due to the forward motion of the ornithopter and due to the capture of pressurized air from the downstroke of the wing.

REFERENCES:
patent: 986364 (1911-03-01), Compton
patent: 1014857 (1912-01-01), Seifert
patent: 1211131 (1917-01-01), Furneaux
patent: 1338025 (1920-04-01), Lind
patent: 1412346 (1922-04-01), Goldschmidt
patent: 1514046 (1924-11-01), Hinkly
patent: 1739630 (1929-12-01), Stelzer
patent: 1744080 (1930-01-01), Prosdocimi
patent: 1810114 (1931-06-01), Smyth
patent: 2418569 (1947-04-01), Baumann
patent: 4712749 (1987-12-01), Fox

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