Patrick Tippmann and Patrick Borton are making progress on the Zenith STOL CH 750 kit plane sitting in pieces in Tippmann's Fort Wayne, Ind., barn. Tippmann plans to fly the plane out of his backyard after laying a 1,700-foot grass airstrip on the edge of his property. The two men met while training for their pilot's licenses in 2011; Tippmann said, "Two years ago if you said, 'Do you think you're ever gonna build an airplane and fly it out of the backyard?' I'd say, 'Heck, no.' "