Aviation-knowledge - Split Shaft/ Free Turbine Engine... In a free power-turbine engine, such as the Pratt & Whitney PT-6 engine, the propeller is driven by a separate turbine through reduction gearing. The
When a helicopter uses a turbine engine, is the exhaust directed rearward to provide thrust in addition to harnessing the turbine to spin the rotor? - Quora
![Schematics of simple cycle turbo shaft engine with free power turbine [1]. | Download Scientific Diagram Schematics of simple cycle turbo shaft engine with free power turbine [1]. | Download Scientific Diagram](https://www.researchgate.net/profile/Barinyima-Nkoi/publication/259482035/figure/fig5/AS:267951022538758@1440895910257/Schematics-of-simple-cycle-turbo-shaft-engine-with-free-power-turbine-1_Q320.jpg)