Autorotative flyer

Amusement devices: toys – Aerodynamically supported or retarded – Including rotary wing

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Details

446 44, 273428, A63H 2712, A63B 6500

Patent

active

051730693

ABSTRACT:
An autorotative flyer comprises a circular root portion integral with a wing portion; the root being generally circular and providing a counterweight of from 55-85%, preferably 70-72%, of the total weight of the flyer and locating the center of gravity of the flyer behind the leading edge of the wing a distance equal to from 28-29% of the mean aerodynamic chord of the wing and at a spanwise distance from the root end of the flyer of from 10-21% of the root end to wing tip span; the wing of the flyer having curved leading and trailing edges and a curved tip with an integral spar along the leading edge and a wing area providing a wing loading of not more than about 0.5 lbs./ft.sup.2 ; and, optionally, scallops on the trailing edge of the wing and a vane on the edge of the root section concentric with the center of gravity.

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"Samara Type Decelerators", Kline & Koenig, pp. 135-141, AIAA 8th Aerodynamic Decelerator and Balloon Technology Conference, Apr. 2-4, 1984.
"Analysis of Samara-Wing Decelerator Steady-State Characteristics", Peter Crimi, pp. 41-47, J. Aircraft, vol. 25, No. 1, Jan., 1988.
Green, Douglas S., "The Terminal Velocity and Dispersal of Spinning Samaras", Americant Journal of Botany, vol. 67, No. 8, Sep. 1980, pp. 1218-1224.
Norberg, R. Ake, "Autorotation, Self-Stability, and Structure of Single-Winged Fruits and Seeds (Samaras) with Comparative Remarks on Animal Flight", Biological Review, vol. 48, 1973, pp. 561-596.

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