Word: backpack
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Dates: during 1957-1957
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...falling speeds up to 120 m.p.h.. the body is remarkably stable in this position. Properly executed, a sky dive is spinproof (accidental spins can whirl or tumble the body up to three times a second, black out the jumper) and keeps the diver on his belly, so his backpack chute can open without fouling. In addition, the sky diver becomes a sort of low-efficiency glider. By moving his arms and legs, he can change position in flight. even pull off a figure eight by use of hands and arms before cracking his chute and drifting to earth under...