
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.
Engines: 3 x Allison T701 turboshaft of 5945kW
Gross weight: 60 Ton
Length: 27 m
Height: 10 m
Rotor diameter: 28 m
Rotor Area: 1200 m2
Gross weight: 60 Ton
Length: 27 m
Height: 10 m
Rotor diameter: 28 m
Rotor Area: 1200 m2

CH-47A Chinook in this 1975 photograph
The following photos are from Frank White's Collection

