Published online by Cambridge University Press: 04 July 2016
The major helicopter development activities at Boeing today centre on three programmes: the CH-47 Medium Lift helicopter (MLH), the YUH-61A Utility Tactical Transport Aircraft System (UTTAS), and the XCH-62 Heavy Lift (HLH) helicopter.
The CH-47 Chinook helicopter was introduced into the US Army inventory in 1962 and has had a history of dynamic engineering development. The initial CH-47 A helicopter had a maximum gross weight of 33 000 lb; the CH-47B, introduced in 1967, had a maximum weight of 40 000 lb; the CH-47C (1968) had a maximum weight of 46 000 lb; and the Canadian Forces CH-147 (1974), a maximum weight of 50 000 lb. Our current development efforts are aimed at modernisation of early aircraft to equip the US Army fleet for operation through the 1980s.
Lecture given on 5th February 1975.