The German Navy launched the main Köln-class frigate in 1961 with two Brown, Boveri & Cie gas turbines in the world's to start with blended diesel and fuel propulsion program. The trail the air usually takes in the engine And exactly how energy is made decides the type of engine. https://jaredjodmm.bleepblogs.com/27739944/types-of-gas-turbine-engine-options