The Boeing Vertol XCH-62 (Model 301) was a three turbine-engined, heavy-lift helicopter project designed for the United States Army by Boeing Vertol. Approved in 1971, only one aircraft was built before it was cancelled in 1974. An attempt by NASA to resurrect the program was aborted in 1983. Following award of an Army contract for a prototype of a "Heavy Lift Helicopter (HLH)" in 1973, Boeing did move forward on building an oversized flying crane machine, the "XCH-62". Rotor diameter was to be 28 meters (92 ft), fuselage length 27.2 meters (89 feet 3 inches), and footprint length 49.5 meters (162 feet 3 inches). Its widely spaced landing gear would allow it to straddle heavy cargoes such as armored vehicles, and still carry twelve troops in its slender fuselage.