A turbojet engine works similarly to a turboprop. It takes air from the engine's rear side to compress and mix it with fuel, producing hot exhaust. The exhaust then drives a turbine (which also powers the compressor) and is discharged at twice the pressure of the atmosphere. Turbojet engine types generate gas streams, which create thrust and propulsion.

Today, the turbojet engine is used in commercial aircraft and private jets. However, compared with the turbofan engine, turbojet engines are considered much less efficient. The relatively simple design of these aircraft engine types takes up very little space and is capable of powering aircraft at very high speeds. However, a big disadvantage is the high fuel consumption a turbojet engine requires.