Click to get a Kiwi Crate Subscription for a kid you love: http://bit.ly/SmarterKiwiCrate Click here if you're interested in subscribing: http://bit.ly/Subscribe2SED Want to tweet this? http://bit.ly/ChopperFall ⇊ Click below for more links! ⇊ ⇊ Click below for more links! ⇊ MUSIC: https://ashellinthepit.bandcamp.com/track/spins-acoustic Click if you'd like to support Smarter Every Day on Patreon: http://www.patreon.com/smartereveryday Click if you'd like to share on Facebook: http://bit.ly/1VzG2L7 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/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ GET SMARTER SECTION Watch all the Smarter Every Day videos about helicopters: https://www.youtube.com/watch?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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ GET STUFF SECTION: (If I did this right these should be working Amazon affiliate links to purchase the stuff I like to use. When people purchase from these links it will support Smarter Every Day.) ❓Mystery Item (just for fun): https://amzn.to/3f9ZUl5 Things I use and like: 📷Camera I use : https://amzn.to/2VSiruw Favorite Lens: https://amzn.to/2KPDQ1a Wide-angle: https://amzn.to/2SlPchR On-camera Mic: https://amzn.to/3aVVbjz Lav Mic: https://amzn.to/3aRek6r Hot shoe mount for Lav Receiver: https://amzn.to/35m6uAo My Tripod: https://amzn.to/2Yl6RtJ My Multi-tool: https://amzn.to/2zGm5Pz Favorite SD Card: https://amzn.to/2KQ3Edz 💾How I get footage off my phone: https://amzn.to/2KMem4K Travel Tripod: https://amzn.to/2zEa9Oi My Backpack: https://amzn.to/35jveJL My Headlamp: https://amzn.to/3deYmVt Favorite Bidet: https://amzn.to/2xnMG3b World Map: https://amzn.to/3aTFCZT Favorite Shoes: https://amzn.to/3f5trfV Everyone needs a snatchblock: https://amzn.to/2DMR4s8 🥽Goggle Up! : https://amzn.to/2zG754g Also, if you’re interested in a Smarter Every Day shirt etc. they’re really soft and you can get there here: https://www.smartereveryday.com/store ~~~~~~~~~~~~~~~~~~~~~~~~~~ Tweet Ideas to me at: http://twitter.com/smartereveryday I'm "ilikerockets" on Snapchat. Snap Code: http://i.imgur.com/7DGfEpR.png Smarter Every Day on Facebook https://www.facebook.com/SmarterEveryDay Smarter Every Day on Patreon http://www.patreon.com/smartereveryday Smarter Every Day On Instagram http://www.instagram.com/smartereveryday Smarter Every Day SubReddit http://www.reddit.com/r/smartereveryday 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/ The thought is it my efforts making videos will help educate the world as a whole, and one day generate enough revenue to pay for my kids college education. If you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO! If you REALLY liked it, feel free to pitch a few dollars Smarter Every Day by becoming a Patron. http://www.patreon.com/smartereveryday Warm Regards, Destin