FLAPPING PROPULSOR Russian patent published in 1997 - IPC

FIELD: heavier-then-air flying vehicles; ornithopters. SUBSTANCE: propulsor includes base 1, drive crank 2, link 3 running through bush 4, rocker arm 5 with shock absorber 6 and connecting rod 7 which are articulated together. Link 3 is connected with lever 8. Pair of levers 11 and 12 form forearm of propulsor; they are connected with closing link 13 by means of two hinges. Link 13 carries bush 14 with axles 15 of swivel flapping blades 16. To form compound motion of blades 16, bush 14 is connected with carrier 18 through ball joint 17. Carrier 18 is rotatably mounted on lever 11. Ball joint is located above plane of forearm levers at all times. EFFECT: enhanced reliability. 2 dwg