Sam Schweighart always wanted to be an astronaut, but he might have to settle for helping to create the first commercially viable flying car. The 31-year-old MIT Ph.D. helped design the Terrafugia Transition, a light sport aircraft that already has 50 customers on its waiting list. With a range of 460 miles and a cruising speed of 115 mph, the "roadable plane" is "meant for a special kind of consumer," says AOPA's Thomas Haines. "If you need to drive and fly a short distance, it solves several problems, including finding or paying for a hangar," he notes.

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