Smarter Every Day - How Helicopter Autorotation works

Destin livin' and lovin' life!

YouTube: GET SMARTER SECTION

Watch all the Smarter Every Day videos about helicopters:
https://www.youtube.com/watch?list=PL...

Tail Number CGYYW is a 2011 Robinson R44 II

The rotors can free wheel because of something called a "Sprag Clutch". https://en.wikipedia.org/wiki/Sprag_c...

You'll note that I didn't call out the stall region of the rotor system on this video. It's the inner 20% of the rotor.

https://en.wikipedia.org/wiki/Autorot...

The graphical elements that are on page 1-46 and 1-47 of this manual were a huge help:
http://armypubs.army.mil/doctrine/DR_...

The type of aircraft int his video is an R-44

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