propulsion system: COGOG

propulsion systems
Naval Engine
engines


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.


Used by

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1972CA Destroyer Iroquois class1
1974UK Frigate Type 21 Amazon class1
1975UK Guided-Missile Destroyer Type 42 (Batch 1 and 2) class2
1975US Destroyer Spruance class2
1975NL Guided-Missile Frigate Tromp class1
1978NL Frigate Kortenaer class1
1979UK Frigate Type 22 (Batch 1) Broadsword class2
1981US Guided-Missile Destroyer Kidd class2
1982JP Destroyer Hatsuyuki class2
1983UK Frigate Type 22 (Batch 2) Boxer class2
1983US Guided-Missile Cruiser Ticonderoga class2


In Service

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CA Canadian Armed Forces
PK Pakistan Navy
UK Royal Navy
NL Royal Netherlands Navy
US United States Naval Aviation
JP Japanese Navy
CL Chilean Navy





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