Free-running turbines / turboprop...

[jcomm 5,919]

It includes a very good explanation of why turbines ( in this case a free-running PT-6 ) cancel torque so effectively:

https://youtu.be/hATrgAsgevY?t=139

The full video here:

https://www.youtube.com/watch?v=hATrgAsgevY

In particular operations ( startup / shtudown ) of a PT-6 in a C-90 here, in another video:

https://www.youtube.com/watch?v=J7Rs6sCHN4s

 

Edited June 17, 2021 by jcomm

[n4gix 4,947]

Very interesting! I had no idea of the technical details of this engine. Thanks for sharing the links. 😎