1978-09-26
1980-04-01
Shay, F. Barry
A63H 2700
Patent
active
041954386
ABSTRACT:
An ornithopter having a pair of flexible fabric wings which are flapped in unison by an elastic motor-operated crank assembly to support the ornithopter during flight. A flexible generally U-shaped member is mounted on the front end of a longitudinal rigid base. A pair of rigid wing struts are pivotally mounted on the tips of the U-shaped member and extend outwardly transversely with respect to the longitudinal base. The crank assembly has a reciprocating lever which is pivotally connected to the inner ends of the wing struts between the spaced tips of the U-shaped member. Rotation of the crank by the elastic motor reciprocates the lever up and down pivoting the wing struts on the tips of the U-shaped member which simultaneously flex inwardly and outwardly, enabling the wings to flap in unison. A flexible spline extends upwardly forwardly from the rear end of the base. A flexible fabric is attached to the wing struts and spline and extends toward the rear of the base to form the pair of wings. The spline is biased downwardly toward the base by the fabric to assist the flapping motion of the wings and to raise the wings to a gliding position after exhaustion of the elastic motor. A tail section may be pivotally mounted on the rear end of the base to adjust the flight characteristics of the ornithopter.
REFERENCES:
patent: 1758178 (1930-05-01), Slinn
patent: 2321977 (1943-06-01), Boatright
patent: 2504567 (1950-04-01), Morgan
patent: 2814907 (1956-04-01), Sears
patent: 2859533 (1958-11-01), Spencer
patent: 3626555 (1971-12-01), Albertini et al.
patent: 3728814 (1973-04-01), Ruston
Dale Frank L.
Dale Leitzel S.
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