Word: kaman
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Dates: during 1970-1979
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...with a delta-shaped airfoil used in conjunction with standard windmill rotors. Pointing into the wind, the triangular whig amplifies the wind's power at least fivefold; the wind is focused into whirling streams that strike the rotors. Other teams at General Electric and at Connecticut's Kaman Corp., a helicopter manufacturer, are considering blades up to 100 ft. long. If these behemoths can be made strong enough to rotate without tearing apart, they could generate up to 3 megawatts (3 million watts) of electricity...