Boeing just announced the ten winners of Phase I in its GoFly competition, in which entrants design, build and fly a “personal flying device.” As Boeing explains, contest rules are designed to enable entrants “To foster the development of safe, quiet, ultra-compact, near-VTOL personal flying devices capable of flying twenty miles while carrying a single person.” The list of partners and co-sponsors is impressive and includes virtually all major American aviation advocacy groups. As the Green Flight Challenge demonstrated seven years ago, prize money encourages a grand series of investments by individuals in hopes of winning a prize. In this case, 3,000 entries by 725 teams from 95 countries presented drawings and documents describing their proposed PFD, with a select …