The Design And Development Of The Rolls-Royce Gem Engine

The Rolls-Royce Small Engine Division began to study the design of a new generation of gas turbine engine for helicopter application in 1966. The size of helicopter envisaged was one requiring a twin-engined installation - each engine of about 1, 000 HP - likely to go into service in the mid 1970s. The eventual outcome of the study was the Gem engine and its first application that of the power plant for the Westland Lynx helicopter, an aircraft that formed part of the Anglo-French helicopter agreement of 1967.