Why Do Backwards Wings Exist?

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  • Published: 20 July 2019
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    Writer/Narrator: Brian McManus
    Editor: Stephanie Sammann (stephanie-sammann.com/)
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    Sound: Graham Haerther (haerther.net/)
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    References:
    [1] hugojunkers.bplaced.net/junkers-ef131.html
    [2] nasa.gov/centers/armstrong/news/FactSheets/FS-008-DFRC.html apps.dtic.mil/dtic/tr/fulltext/u2/a124715.pdf
    [3] dept.aoe.vt.edu/~mason/Mason_f/ConfigAeroTransonics.pdf
    [4] bit.ly/2Y17MM2
    [5] apps.dtic.mil/dtic/tr/fulltext/u2/271130.pdf
    [6] srmuniv.ac.in/sites/default/files/downloads/class5-2012.pdf
    [7] nasa.gov/centers/armstrong/news/FactSheets/FS-081-DFRC.html
    [8] repository.lib.ncsu.edu/bitstream/handle/1840.16/2141/etd.pdf?sequence=1
    stms.pro/video/pg-Qi5TYzK0/video.html?t=2161
    [9] page 18 nasa.gov/sites/default/files/files/Sweeping_Forward.pdf
    [10] stms.pro/video/LOmvrk3LPGc/video.html?t=421
    [11] apps.dtic.mil/dtic/tr/fulltext/u2/a124715.pdf
    [12] nasa.gov/centers/dryden/pdf/88172main_H-1574.pdf
    [13] page 24 nasa.gov/sites/default/files/files/Sweeping_Forward.pdf
    [14] nasa.gov/centers/dryden/pdf/120266main_FS-008-DFRC.pdf
    [15] Page 124 nasa.gov/sites/default/files/files/Sweeping_Forward.pdf
    stms.pro/video/LOmvrk3LPGc/video.html?t=999
    [16] Page 127 nasa.gov/sites/default/files/files/Sweeping_Forward.pdf
    [17] Page 208 nasa.gov/sites/default/files/files/Sweeping_Forward.pdf

    Thank you to AP Archive for access to their archival footage.

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Comments • 3 689

  • Toby Cornwall
    Toby Cornwall  2 hours back

    Fair play. If you have to get into aeroelasticity then you know it's going to be difficult to explain.

    • TMoD7007
      TMoD7007  3 hours back

      7:35 What the fudge???

      • 90 Lancaster
        90 Lancaster  4 hours back

        I like the idea of the merger of FSW with Blended wing designs - seen in the Sci-fi Movie stealth.

        • Mov
          Mov  6 hours back

          Could you not just put the ailerons closer to the wing root, rather than sweeping the wings forwards?

          • some boi who just don't give a damn no more

            And people say war represents the greatest failure of man...

            • vgpe gana
              vgpe gana  7 hours back

              fluids mechanics, applied aerodynamics

              • deks räikkönen
                deks räikkönen  7 hours back

                Yeah the SU47 Berkut is so much cooler, like any ACE player knows.

                • -SMP- scientific method perspective

                  This is super interesting. Thank you

                  • TheCaptainRudy
                    TheCaptainRudy  13 hours back

                    Why does the spanwise flow occur?

                    • DJAlbertzz 123
                      DJAlbertzz 123  18 hours back

                      My favorite plane in Jane's fighters anthology was the x-29

                      • Andrew C.
                        Andrew C.  21 hours back

                        Incredible direct firehose explanation, well done- but that squeaky hinge sound is PURE EAR RAPE. Do engineers not have ears?

                        • Mastacheifa 118
                          Mastacheifa 118  23 hours back

                          Came here to learn about backwards wings. Instead learned how to make better forwards wings on KSP.

                          • Drew Hurst
                            Drew Hurst  1 days back

                            Sure it wasn't all those antennas on the nose causing instability? 12:12

                            • WellBeSerious12
                              WellBeSerious12  1 days back

                              Shame these inventions are only used for war.

                              • AriffNZR 2005
                                AriffNZR 2005  1 days back

                                Got lost somewhere in the video.

                                Not knowing is a knowledge.

                                • Raw Bird
                                  Raw Bird  2 days back

                                  Your video needs some oil, my ears are bleeding. Great video otherwise.

                                  • Disquette
                                    Disquette  2 days back

                                    The amount of effort in this video, goodness gracious... well done, Real Engineering, well done.

                                    • patrick O'flannigan
                                      patrick O'flannigan  2 days back

                                      Why the nails on chalkboard man!

                                      • Info Hub
                                        Info Hub  2 days back

                                        God bless! needGod.com

                                        • Black
                                          Black  20 hours back

                                          Ray Comfort? Really?

                                      • GraniteCityCarguy
                                        GraniteCityCarguy  2 days back

                                        Can't stop watching these videos, so informative and well edited. Great content mate, keep it up!

                                        • Leon Manson
                                          Leon Manson  3 days back

                                          OK befor I even watch this they are not backwards wings as they are positioned forwards (-_-)

                                          • RevMatch26
                                            RevMatch26  3 days back

                                            Awesome video! I have piece of information Id like to add about the P-38. The hydraulics on the P-38 had enough advantage to be able to overcome any aerodynamic stiffening, so that was not the issue. The airflow separation that came from main wing by exceeding the max mach number caused the tails control surface to be caught in a "vacuum". With the hydraulic boosted controls the pilot would have been capable of full elevator deflection, but he lack of air flow over the control surface would make it too ineffective to change the pitch of the aircraft. The only time the P-38 could reach these speeds was when it entered a dive, so if this mach number was reached in the dive to cause the shock wave to form, then there would be almost nothing the pilot could do to regain control as he would be stuck in the dive, unable to pull up with the now useless elevator. From colder (higher) dives the speed of sound is slower, so most of the time get out of the high altitude dive would be that the higher temperatures at lower altitudes would raise the mach number enough to get them out of trans-sonic speeds and regain elevator authority. You can actually find experimental P-38 with an up curved tail boom to try and keep the elevator clear of the "vacuum area", but it proved to be too weak of a structure. The Germans, with there hydraulically advanced aircraft, would eventually figure this out and used this knowledge to be able to escape by diving, knowing the P-38 would not be able to follow them in the dive. Where as the Japanese Zeros did not have hydraulic assistance, so they too were unable to enter a high speed dive, but for the reason of aerodynamic stiffening, so the P-38 dominated the sky where the enemy fighters had no way out.

                                            • The Batman
                                              The Batman  3 days back

                                              Can-ards not ka-nards

                                              • Midnight Mechanic
                                                Midnight Mechanic  3 days back

                                                I would like to see an analysis of the ADF-01 Falken's airframe design, and whether it would be the amazing machine that it's shown to be. Gigantic 3D thrust vectoring engines, a vertical airfoil that extends out when landing gear is up, and a glassless cockpit with a long, sharp nose to divert oncoming radar.

                                                • Rajat Sinha
                                                  Rajat Sinha  3 days back

                                                  Not once did u mention su 47

                                                  • Muhammad FaiZ
                                                    Muhammad FaiZ  3 days back

                                                    Let me make it easier for you
                                                    The Video Says:"Blah Blah Blah vlah vlah yur mam fet vlah blah "

                                                    • Sky Bound
                                                      Sky Bound  4 days back

                                                      Top of the morning to ya

                                                      • Cipher Galm 1
                                                        Cipher Galm 1  4 days back

                                                        WHY DID YOU CALL THEM BACKWARDS WINGS?!?!?!

                                                        • Darkfire Project
                                                          Darkfire Project  4 days back

                                                          Because they look awesome that's why.

                                                          • Pete Beatminister
                                                            Pete Beatminister  4 days back

                                                            May be we see this kind of design again in the future, for example on hypersonic planes and ultra high altitude planes. The computer stabilising is much less of a problem today as it was in the 80s and 90s. The computers back then just weren't fast enough to handle it properly. The early all-wing planes struggled with that as well, since they were also very unstable when flown manually. Similar the first Apache helicopters.
                                                            But today any good cell phone has more umphf than the high end computers in the 80s, so its much less of an issue to design a electronic stabiliser system.

                                                            • Mifune Takumi
                                                              Mifune Takumi  4 days back

                                                              They make anime planes backwards wing a real thing? 🤔

                                                            • Optillian
                                                              Optillian  4 days back

                                                              Because it looks cool.

                                                              • NooBMasteR69
                                                                NooBMasteR69  5 days back

                                                                The fact that if usa and Russia didn't defeat the nazi's non of their plaens would exist now

                                                                • Otto Von Bismarck
                                                                  Otto Von Bismarck  5 days back

                                                                  Sorry but i am unable to understand this nerdy bullshit.

                                                                  • molluscturtle
                                                                    molluscturtle  5 days back

                                                                    What a beautiful plane that X-29 is. Great video.

                                                                    • bong Scott
                                                                      bong Scott  5 days back

                                                                      Air burst jets to interrupt the air burst build up by using a small extremely high micro reverse air pressure set around the wings and points to see if you could cancel the sonic boom affect at the point off the bang???and you could add a parachute for RC craft??????

                                                                      • nj1911
                                                                        nj1911  5 days back

                                                                        shouldn't the title be: Why Do Forwards Wings Exist?
                                                                        I guess it's backwards from the norm but they point forwards
                                                                        in the video itself you also call them forward swept wings

                                                                        • Stone Ruano Singh
                                                                          Stone Ruano Singh  5 days back

                                                                          Skip to 8:45.

                                                                          • IAmAgainst
                                                                            IAmAgainst  6 days back

                                                                            Is there any military technology that wasn't invented by the Germans?

                                                                            • Nonmassmedia
                                                                              Nonmassmedia  6 days back

                                                                              That awkward moment when the narrator says "BUT".

                                                                              • SCARSAC
                                                                                SCARSAC  6 days back

                                                                                absolute great programing thank you , you just got a new subscriber

                                                                                • Jaydeep Das
                                                                                  Jaydeep Das  6 days back

                                                                                  8:40
                                                                                  Me : *WAIT , DID U JUST SAY INFORMATION OF AMERICAN TECHNOLOGY IS EASILY AVAILABLE?*

                                                                                  • Smoothie Cris
                                                                                    Smoothie Cris  6 days back

                                                                                    Can someone explain how modern jets like the f22 deal with supersonic air problems?

                                                                                    • Rampy
                                                                                      Rampy  6 days back

                                                                                      The chordwise/spanwise flow theory is total bollocks! It's a simple explanation that doesn't explain how the normal shock wave is diminished using sweep. It can be easily disproved.

                                                                                      • WgoodT - with good taste

                                                                                        Looks like the "Mockingbird" from Robotech.

                                                                                        • Ashja Keira Loberiano
                                                                                          Ashja Keira Loberiano  6 days back

                                                                                          reverse engineering..hahaha

                                                                                          • Linus Kardell
                                                                                            Linus Kardell  6 days back

                                                                                            There is a ton of interlacing in the video.

                                                                                            • Linus Kardell
                                                                                              Linus Kardell  6 days back

                                                                                              What about delta wings?