The turboshaft engine is the engine that produces the power of the shaft to run the machine instead of generating thrust to fly the aircraft. The turboshaft engine is common in small applications, for example, helicopters and other power units.

To produce the energy for the aircraft engine, the turboshaft uses the same principle which turbojet used to fly the aircraft, and the compressor will be incorporated.

The prime difference between a turbojet engine and a turboshaft engine is that it has a power av section. Additionally, it consists of an output shaft and turbine, which have been incorporated into the design.