propulsion system: COGOG

propulsion systems

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.

  Used by

1972CA Iroquois class destroyer DD 1
1974UK Type 21 Amazon class frigate FF 1
1975US Spruance class destroyer DD 2
1975NL Tromp class guided-missile frigate FFG 1
1975UK Type 42 (Batch 1 and 2) class guided-missile destroyer DDG 2
1978NL Kortenaer class frigate FF 1
1979UK Type 22 (Batch 1) Broadsword class frigate FF 2
1981US Kidd class guided-missile destroyer DDG 2
1982RU Project 1164 Atlant class guided-missile cruiser CG 2
1982JP Hatsuyuki class destroyer DD 2
1983UK Type 22 (Batch 2) Boxer class frigate FF 2
1983US Ticonderoga class guided-missile cruiser CG 2

  In Service

CA Canadian Armed Forces
PK Pakistan Navy
UK Royal Navy
NL Royal Netherlands Navy
US US Navy
RU Russian Navy
JP Japanese Navy
CL Chilean Navy

Helicopters for sale
Future helicopters
Flying a helicopter
Helicopter stories
TV and movies

Helicopter books
Helicopter patches
Helicopter model kits