A2_8 Propeller Hats Do Not Make Good Parachutes

K. J. Cheshire, C. T. Davies, R. Garratley, J. Moore


In this paper we investigate whether a person can survive a fall using only a propeller hat to save them as often depicted in cartoons. We find the propeller requires an angular velocity of 58 rads/s for a person to land at a safe velocity of 7 m/s.

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