The history of the flying-car genre is fraught with flops, but Terrafugia Inc. hopes its Transition model is safe and simple enough for today's consumers.The Jetsons had one, and Fred MacMurray flew one in "Flubber." Novelist Ian Fleming included one in his children's book "Chitty Chitty Bang Bang." James Bond's nemesis Francisco Scaramanga used one as a getaway vehicle in the film "The Man With the Golden Gun."