Word: aerofoil
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...hundreds of dollars less. But before you set your sights on a bootleg version, Samways says that the Air Multiplier's deceivingly simple structure is the result of a laborious design process that can't be easily copied. "We have many patents on this [fan], on the impeller, aerofoil and product development," he says. Whether those patents can stand up to the sheer bureaucracy of enforcing them in China remains to be seen...
...World War II exploit celebrated in a book and the film The Dam Busters; in Leatherhead, England. Sir Barnes' career began with his World War I work on a British counterpart to the German zeppelin, included his development of the first swing-wing jet aircraft and hollow aerofoil design, and ended in 1971 with his efforts to improve upon the supersonic Concorde, a machine he considered rather primitive...
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