propulsion system: COGOG

Naval Engine


Combined gas or gas (COGOG) is a type propulsion system using only gas turbine engines.

A high efficiency, low output turbine is used for cruising speeds with a high output turbine being used for high-speed operations. A clutch allows either turbine to be selected, but there is no gearbox to allow operation of both turbines at once.

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1972 Destroyer Iroquois class1
1975 Guided-Missile Frigate Tromp class1
1975 Guided-Missile Destroyer Type 42 (Batch 1 and 2) class2
1975 Destroyer Spruance class2
1978 Frigate Kortenaer class1
1979 Frigate Type 22 (Batch 1) Broadsword class2
1981 Guided-Missile Destroyer Kidd class2
1982 Destroyer Hatsuyuki class2
1983 Frigate Type 22 (Batch 2) Boxer class2
1983 Guided-Missile Cruiser Ticonderoga class2

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