• Published: 26 April 2016
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    Thanks to Neil deGrasse Tyson for being cool and playing along:
    Original Tweet in question:

    Thanks to Brad Friesen:
    Thanks to Gerry Friesen:


    Watch all the Smarter Every Day videos about helicopters:

    Tail Number CGYYW is a 2011 Robinson R44 II

    The rotors can free wheel because of something called a "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.

    The graphical elements that are on page 1-46 and 1-47 of this manual were a huge help:

    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"
    Gordon McGladdery did the outro music the video as well.

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  • Science and Technology Science and Technology

Comments • 5 734

  • chris b
    chris b  14 hours back

    "Slowly glide to the ground". Uh, no.

    • Nick
      Nick  2 weeks back

      I’m 25 years old and I want you to be my dad

      • Nick
        Nick  2 weeks back

        How cool was that of Neil!

        • Fear Logicc
          Fear Logicc  2 weeks back

          He has 16,000 flight hours okay and then you add that to days It’s 666 days lmao try it

          • Flip
            Flip  2 weeks back

            Ik someone named bradly freezen no lie

            • Caspar Galley
              Caspar Galley  3 weeks back

              0:30 He got out of the helicopter, set up a camera. Went all the way back into the helicopter, to film him getting out of the helicopter. LOL

              • Hector Betancourt
                Hector Betancourt  3 weeks back

                How in the world could Tysen have said such idiocy? 🙄

                • Kross
                  Kross  3 weeks back

                  Niel Degrasse Tyson is a fraud

                  • Eternal Vigilance
                    Eternal Vigilance  3 weeks back

                    Neil is a moron, but the rest of the video was interesting.

                    • Amilla Li
                      Amilla Li  4 weeks back

                      You only have a few seconds to recognize engine failure and lower the collective ,or else .

                      • SheepEatingDuck
                        SheepEatingDuck  4 weeks back

                        Don't think he realizes glaciers are heavy enough to crush you..

                        • BE4ST
                          BE4ST  1 months back

                          My brain hurta now thnx

                          • G S
                            G S  1 months back

                            1:33 someone turned an airplane into a slider mash burger

                            • Mysterious Adam
                              Mysterious Adam  1 months back

                              Didn't know helicopters can flare.

                              • Subi Life
                                Subi Life  1 months back

                                install an emergency parachute and all these problems go away duhhhh

                                • Jaco Theunissen
                                  Jaco Theunissen  1 months back

                                  What helicopter is that. Like what make and brand?

                                  • chad x
                                    chad x  1 months back

                                    The vector diagrams look wrong. Lift vector should be perpendicular to direction of airflow. Drag should be parallel to airflow. The diagram doesn't show this. Their is an offset. Please explain. Enjoy you show.

                                    • Rob Dolan
                                      Rob Dolan  1 months back

                                      Ur a weird dude

                                      • StopMotionLive
                                        StopMotionLive  1 months back

                                        If this went wrong we would probably be watching this on liveleak

                                        • C.I.M.
                                          C.I.M.  1 months back

                                          I had to do the same, it’s really scary when you get shot by an AA and have to land in front of the enemy. One of my guys didn’t press V fast enough once landed and got incapacitated, then he forced respawn, idiot.

                                          • snurk agurk
                                            snurk agurk  1 months back

                                            The autogyros would be proud

                                            • Defender Alt
                                              Defender Alt  2 months back

                                              Can’t wait to do this next week on Wednesday at 2:30 PM!

                                              • Acecool
                                                Acecool  2 months back

                                                Seriously? Neil Degrasse Tyson said that; disappointing? It is nice he is willing to learn, but to post something as though you're an expert, especially with such a large audience helps the spread of misinformation and feeds unfounded fear of something... I already know how to glide a chopper if an engine goes out using the auto-gyro ( auto rotation as you said in the video, which may be the correct term but I learned it as auto gyro ) effect, so it effectively becomes a glider...

                                                Further, on the topic of helicopters... To help quench misinformation: if you lose the tail-rotor, you are still able to fly the chopper safely.... You simply have to fly it like a plane by increasing your forward momentum.. You lose your vertical take off and landing capability without the rear stabilizer because if you fly too slowly forwards, as you aren't being stabilized with counter-rotation, and rotate / spin - which you can recover from, but if you fly it forward, quickly, it self-stabilizes.... This is also a reason why there are skid-pads on helicopters instead of landing 'legs', on most anyway... Or if there are landing legs they should have a ski style to them to allow sliding.

                                                • Skyview Productions
                                                  Skyview Productions  2 months back

                                                  what did you use to rig the gopro to the skid

                                                  • G W
                                                    G W  2 months back

                                                    no record from outside?

                                                    • G W
                                                      G W  2 months back

                                                      noise canceling mic?

                                                      • bepe
                                                        bepe  2 months back

                                                        Before watching:
                                                        Couldn't you just lean forwards and turn it into a glider? Sure, it'll smash the bottom of the helicopter but it's better than death.

                                                        Post watch: yep, but it doesn't do as much damage as I thought

                                                        • Evan Hung
                                                          Evan Hung  2 months back

                                                          with this knowledge, I now prefer helicopters with wheels.

                                                          • Sharon Morales
                                                            Sharon Morales  2 months back

                                                            Lame that the girl got the doodle crate

                                                          • Caillou
                                                            Caillou  2 months back

                                                            NEIL DEGRASS TISON

                                                            • sean soblixe
                                                              sean soblixe  2 months back

                                                              DUDE ITS CALLED AUTO ROTATE

                                                              • Nigel Hopkins
                                                                Nigel Hopkins  2 months back

                                                                Hey Destin!! I am so surprised you didn't mention the Big leaf maple seed. It uses exactly what you are talking about in the most basic way. Instead of the seeds just falling straight to the ground "like a brick", they glide down to disperse. It uses gravity and its fall to spin it's blade transferring the energy of falling weight into the surrounding atmosphere to gain a type of glide/flight to prevent from falling like a brick lol.

                                                                • Will Rogers
                                                                  Will Rogers  2 months back

                                                                  "How many hours do you have?"
                                                                  "A little over 16,000."
                                                                  "That's all? Well maybe you'll learn how to do this someday."

                                                                  • Lars Murdoch Kalsta
                                                                    Lars Murdoch Kalsta  2 months back

                                                                    5:10 the helicopter can touch down at a lower speed yes but the ways that they touch down means it's possible to have a much lower impulse than would be possible in a helicopter

                                                                    • OH YEAH YEAH
                                                                      OH YEAH YEAH  2 months back

                                                                      *I swiped up*

                                                                      • P Davis
                                                                        P Davis  2 months back

                                                                        Airplanes often have 10:1 glideslopes during engine failure...
                                                                        Autorotation is far more iffy.
                                                                        I was never nervous about having the ability to safely land (in light aircraft).
                                                                        A light aircraft can be crabbed in to slow it's groundspeed btw.

                                                                        • Silverburstnelson
                                                                          Silverburstnelson  2 months back

                                                                          NEIL!!!!!!!!! I was geeking out for Destin that Neil deGrasse Tyson freakin video replied to him.

                                                                          • skuzlebut82
                                                                            skuzlebut82  2 months back

                                                                            Autorotation is cool but the Mythbusters showed you can hang on to an aircraft escape slide and ride it safely down to Earth. When are you going to try that?

                                                                            • theysrone
                                                                              theysrone  2 months back

                                                                              Destin, were you in Alaska? Upper and lower Reed lakes? I tried to find that crash but never found it. We hiked the whole trail.

                                                                              • Blake Lund
                                                                                Blake Lund  2 months back

                                                                                A plane is safer because if it lands in water. The plane will level out thanks to the wins but the helicopter will quit over upside down

                                                                                • EXL Playz
                                                                                  EXL Playz  2 months back

                                                                                  A plane -> Glider

                                                                                  Helicopter -> brick

                                                                                  Meanwhile at the airport... a chunk of brick is falling with a person standing on it. Got it.

                                                                                  • FIGJAM
                                                                                    FIGJAM  3 months back

                                                                                    black science man is a pop science idiot

                                                                                    • Bob
                                                                                      Bob  3 months back

                                                                                      Dam, that is litteraly in my backyard...well 40 miles from me that is.

                                                                                      • Robert Terry
                                                                                        Robert Terry  3 months back

                                                                                        Neil Tyson is wrong on a lot of things.

                                                                                        • DJ BIG Turbo
                                                                                          DJ BIG Turbo  3 months back


                                                                                          • Procyon
                                                                                            Procyon  3 months back

                                                                                            Imagine Neil Degrasse Tyson dropping into dms like

                                                                                            • Andrew Campbell
                                                                                              Andrew Campbell  3 months back

                                                                                              Don’t look at your phone while driving you might get a ticket😉

                                                                                              • Theo Stene
                                                                                                Theo Stene  3 months back

                                                                                                16000 hours is 666 days