Turboprops The Gas Turbine Types Slide will give you more information about the various engine types. There is also a slide devoted only to turboprop engines. On this slide we show a computer drawing of a turboprop engine. The turboprop uses a gas turbine core to turn a propeller .
Propeller engines develop thrust by moving a large mass of air through a small change in velocity.
In the turboprop, a gas turbine core is used. There are two main parts to a turboprop propulsion system, the core engine and the propeller. The core is very similar to a basic turbojet except that instead of expanding all the hot exhaust through the nozzle to produce thrust, most of the energy of the exhaust is used to turn the turbine . There is an additional turbine stage present, as shown in green on the drawing which is connected to a drive shaft. The drive shaft, also shown in green, is connected to a gear box .