World War I flying ace and frequent Popular Science contributor Eddie Rickenbacker
envisioned a monstrous airliner that would fly in "but a very few years." With a boat-like fuselage that let it alight on land and water, Rickenbacker's concept looks slightly like the Boeing Model 314 Clipper, the flying boat that made the first scheduled trans-Atlantic flight in 1939. The Clipper's 74 seats converted into 40 bunks--but there was no observation deck. The 300-foot wingspan of the giant would have dwarfed the Clipper's 152 feet.