propulsion system: COGOG

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.

Naval Engine · engines

Class Family

propulsion systems
- propulsion system: CODLOG
- propulsion system: CODAD
- propulsion system: CODAG
- propulsion system: CODLAG
- propulsion system: CODOG
- propulsion system: COGAG
- propulsion system: COGOG
- propulsion system: COSAG

Used by

Year	Type	Class	Qty
1972	Destroyer	Iroquois class
1974	Frigate	Type 21 Amazon class
1975	Guided-Missile Frigate	Tromp class
1975	Guided-Missile Destroyer	Type 42 (Batch 1 and 2) class	2
1975	Destroyer	Spruance class	2
1978	Frigate	Kortenaer class
1979	Frigate	Type 22 (Batch 1) Broadsword class	2
1981	Guided-Missile Destroyer	Kidd class	2
1982	Guided-Missile Cruiser	Project 1164 Atlant class	2
1982	Destroyer	Hatsuyuki class	2
1983	Guided-Missile Cruiser	Ticonderoga class	2
1983	Frigate	Type 22 (Batch 2) Boxer class	2