Boeing Vertol XCH-62

The US Army Heavy Lift Helicopter or HLH specification was approved in May 1971 for a 22 tonnes payload class helicopter in an attempt to match the top russian models: the Mi-26 and the much bigger Mi-12. Boeing proposal wins over the Sikorsky S-73 which was not built. The XCH-62 prototype was in an advanced state of assembly, with a expected initial flight in 1975, when the program was cancelled in October 1974. The only aircraft built (Serial number 73-22012) was put into storage at the US Army Aviation Museum at Fort Rucker Alabama until scrapped in 2005. Some parts were sent to the british Helicopter Museum at Weston-super-Mare. In 1983, NASA and DARPA ( Defence Advanced Research Projects Agency ) plans were initiated to resume the test programme but was cancelled again.