In 1943 the Metropolitan-Vickers Electrical Company was commisioned to provide a gas turbine engine for an auxiliary power plant in a warship, an existing F2/3 jet engine was used as a generator. The engine was fitted with a power turbine driven by exhaust gases, coupled to a propeller shaft via a reduction gearbox. The trials of the Beryl engine in MGB 2009 took place in the Solentin 1947, with the Fast Patrol Boats Bold Pioneer and Bold Pathfinder the first warships to be built specifically for gas turbine propulsion, in 1953.

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