propulsion system: COGOGpropulsion systemsNaval 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. |
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