2016-04-26

[public] 7.69M views, 136K likes, 3.45K dislikes audio only

SmarterEveryDay

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Thanks to Neil deGrasse Tyson for being cool and playing along: https://twitter.com/neiltyson

Original Tweet in question:

https://twitter.com/neiltyson/status/623117641507557376

Thanks to Brad Friesen: https://goo.gl/bbUxuR

Thanks to Gerry Friesen: http://www.bchelicopters.com/

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Watch all the Smarter Every Day videos about helicopters:

https://www.youtube.com/watch?list=PL6CECC2E56B68A2C3&v=Cg1CPmtZL4c

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_clutch

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/Autorotation

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_pubs/dr_a/pdf/fm3_04x203.pdf

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

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Ambiance and musicy things by: A Shell In The Pit

Music" "Spins" https://ashellinthepit.bandcamp.com/track/spins-acoustic

Gordon McGladdery did the outro music the video as well.

http://ashellinthepit.bandcamp.com/

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Warm Regards,

Destin