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.
| Flying a Helicopter | Accidents | Jobs |
35718 serials 7189 photos 2403 heliports
|From your mobile |
|MH-53M, MH-60R Gazelle HT.2 & HT.3|
| EH.101, NH.90, Tigre, Bell 430, AW.139 |
|Orgs.|| CV-22 Osprey, EC.145|
|Units:||HS-1, 78Sqd, USCG, PNA |
|Ships:||Destroyers, HMS Ark Royal |
|New:||Bell 525, AW.149, AW.609, S-61T |
| ||X2, X3, EC.130T2, EC.175 |
|US Army AAAS Ultralights |