WHAT is it about “flying cars” that makes otherwise sensible engineers lose touch with reality? Ever since Glenn Curtiss, a seaplane pioneer, racing legend and the Wright brothers’ rival, tried to make a flying car early in the last century, tinkerers have dreamed of having an automobile sprout wings, soar above the traffic, then land and tuck its wings away ready for a short trip into town. Flying cars of one sort or another have dominated the pages of schoolboy comics ever since...
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