The EM Drive: Fact or Fantasy? | Space Time


Comments • 2 677

  • DeadtotheBone
    DeadtotheBone  3 days back

    I can't move my car by pushing on the steering wheel, but I can move a boxcar by hurling myself against the wall.

    • Martinakis
      Martinakis  5 days back

      The thing is that devices like these are used to delude the opposition of Copenhagen. Recent NAVY videos and testimonies of UAP's accelerating 5 miles and stoping on a dime in only 1 second suggest that our understanding of inertia, gravity and space-time are not so complete as we've believed. I wonder, what else would drive that contraption, other than pilot waves, virtual particles which convert this ZPE to electricity and propulsive force.

      • Zes
        Zes  6 days back

        wrg, no such thing as more or less likelyx, explainx any by any nmw and any be perfx

        • Judy kim
          Judy kim  1 weeks back

          Ion drive is better than EM drive, Looks like Ion driver is winner; EM Drve has big problem with securing One Million Wats of power sources.

          • Sietze van de Burgt
            Sietze van de Burgt  1 weeks back

            Nasa is smart they will test it, also if the thing gives the same amount of heat than it will not work in a vacuum chamber but looking it in a critical way is necesary but if it works in a vacuum it will not work by heat as you understand it needs something to heat it and it might if it gets going get us somewhere interesting is to see how long it can keep on propelling us up to what speed ???

            • V'GER Lightning
              V'GER Lightning  2 weeks back

              Beloved Matt, how about you working with the director of anti - matter propulsion research, I have great faith in your unfathomable genius, your true astonished admirer, V'GER LIGHTNING.

              • MrAaronvee
                MrAaronvee  2 weeks back

                Fantasy. Anyone who believes in this simply reveals their own scientific ignorance.

                • Elijah Baldwin
                  Elijah Baldwin  2 weeks back

                  Can you do more space time journal club videos and make a playlist?

                  • brinbrin62 62200
                    brinbrin62 62200  2 weeks back

                    Nothing new since 2017 ?

                    • Matt Tirado
                      Matt Tirado  2 weeks back

                      We need to understand that what we believe to be fundamental is exactly the opposite!!! So, I posit that the answer to propellant is actually it's opposite, which would be suction. Suction is actually the greatest propellant. So we need to invent something that sucks in the spacetime from the front, so you actually have 2 drives, which would be the suction and pull from the front and massive propellant and push from the back. Therefore your energy and transportation is coming from the front and back, kind of like a compressor...This, i believe would cause light speed and beyond

                      • Mike McGomer
                        Mike McGomer  3 weeks back

                        I understand nothing he says, especially about the Patrion theory.

                        • Xeno Bardock
                          Xeno Bardock  3 weeks back

                          Producing compression and rarefaction/high and low pressures in the aether with very high frequency high voltage electricity, that's the secret to EM Drive, the real one that military uses behind closed doors.

                          • Aaron
                            Aaron  3 weeks back

                            Kudos to the introduction of a journal club style YouTube presentation. I'm glad this channel produces the smart content it does.

                            • franksredhotcayennepeppersauce

                              Thunderf00t has a great video on this

                              • Ed Hughes
                                Ed Hughes  4 weeks back

                                Ya sure just modify higgs boson and put this on a light switch and you got a space rocket. Problem is if you can turn off the higgs boson then you do not need a rocket.

                                • Dusan Novakovic
                                  Dusan Novakovic  4 weeks back

                                  I have a bit of a problem with proposed idea of validity of an expectation that alien civilizations would use the electromagnetic communication system. I would expect that advanced civilizations move away from electromagnetic communication system simply because it would be too slow at the cosmic distance. Even for a Earth-Mars distance, there can be delay from around 4 up to around 24 minutes. So larger scale communication such as interstellar sounds pretty inconvenient through simple em communication system (which is constrained by the light speed). That would mean that advanced interstellar civilization would have to find much more practical way of communication than em. One idea that comes to mind as a solution could be using quantum entanglement as a means of communication which seems to allow instant transfer of information, and that kind of communication wouldn't be detectable the way em does.

                                  • Living Bard
                                    Living Bard  4 weeks back

                                    so will the microwave make my corn taste good? or will it deform the corn?

                                    • Living Bard
                                      Living Bard  4 weeks back

                                      if you put a balloon that was 99.9% volume maxed and ran the microwave shouldn't the space deform pop it?

                                    • Living Bard
                                      Living Bard  4 weeks back

                                      follow up. if I put a can of corn in that microwave drive, will it smash it or cook it?

                                  • LaughingSeraphim
                                    LaughingSeraphim  4 weeks back

                                    So, if one sits on a skate board and lurches back and forth, they can move. Same thing sitting on a swing. Could this cause a thrust? Are the bouncing particles akin to rocking back and forth? The larger end would get more energy than the small end, which would cause collision?

                                    • Marc Bondura
                                      Marc Bondura  1 months back

                                      I absolutely love how Matthew O'Dowd
                                      Matthew O'Dowd responds to dumb questions or statements with an statement that is guaranteed to go right over that person's head while also intellectually b**** slapping them through the power of the internet LOL.

                                      Since you are a professor is it accurate to use Dr. Matthew O'Dowd or leave that out?

                                      Can you talk about the dozen or two papers you've had published or were part of that were published?

                                      I am one of the least intelligent people watching regularly I am fairly confident about this. But you and your channel have completely got me hooked. Tho I might understand 5 or 10% of all words in w video of yours I still am incredibly curious and I yearn for the next upload :)

                                      • Force Majeure
                                        Force Majeure  1 months back

                                        Hears my eM drive, a fucking light bulb.

                                        • TrillBillzCozby
                                          TrillBillzCozby  1 months back

                                          I'm always looking for examples of the double slit experiment/photon play, I was disappointed when I was about to write "Could it be that observing the experiment causes a double slit effect altering the path and "thrust" of the involved photons?" but the comment under mine(haha) explained how it was debunked using magnetic fields.

                                          • PK Cazadores
                                            PK Cazadores  1 months back

                                            Oh wow, PBS leaves the comment section open on science at least. A little cowardly (and illegal, as they take federal funding) to close the comment section in OUR other videos.

                                            • Adrov
                                              Adrov  2 months back

                                              Hi, would you please review: ... Time for new video on propulsions =)

                                              • speedyguy8
                                                speedyguy8  2 months back

                                                Bob Lazar has been talking about these paradigms for years. Oh you don't know who he is? Of course you don't. You probably don't even know how many electrons are in the valence shell of moscovium. How cute

                                                • Pure Rust
                                                  Pure Rust  2 months back

                                                  Lazar is a nut and his story has more holes in it than swiss cheese. Keep your condescending cringy nonsense to yourself.

                                              • Merle Patterson
                                                Merle Patterson  2 months back

                                                With space drive technologies advancing and applying a hypothetical "Moore's Law" to materials science advancements, it's reasonable to make the hypothetical assumption that within the next couple of decades we might have the technology to send a new spacecraft with advanced propulsion systems to catch up to one of the Pioneer or Voyager probes and either return them to earth or analyze them in flight and return the data.

                                                • Bruce Borneman
                                                  Bruce Borneman  2 months back

                                                  Is there not a way to treat propulsion in space with a magnetic drive like we do with the bullet trains and such that are magnetically driven to insane speeds here on earth by using the particles around the spacecraft to help generate this effect?

                                                  • doikus
                                                    doikus  2 months back

                                                    studies  are needed still light sail would seem more practical, really though, we are running out of time

                                                    • terrafirmament
                                                      terrafirmament  2 months back

                                                      Good points, and a few to consider. 1) The EM-drive has been claimed by the Chinese to work using higher energies of over 2 Kw, however the whole EM-drive issue may be a Tech War smokescreen analogy to the Cold War star wars initiative, to get rivals to spend money uselessly by claiming success. However: 2) We operate in a limited scientific bubble, as we always do at any moment. Our current understanding can not be assumed to explain all phenomena. Example with graphene acting as superconductor, and other unpredicted results. Additionally, a failed or a flawed result, can be the result of a poorly designed study/experiment. I would err on the side of curiosity, not caution. It is a flawed belief that in research circles scientists are skeptics, no, not at all, they are vastly more curious than that. Skepticism is the hallmark of someone outside of a field of study looking into a roomful of weirdos doing weird and worthless s__t.

                                                      • Richard Deese
                                                        Richard Deese  3 months back

                                                        I suppose you had to cover this, as certain people no doubt kept clamoring for it. But this is not science, any more than so-called zero-point energy devices. Even if you think you're doing the right thing by covering it with a skeptical eye, I think you're wrong. It really just means that the very next time something equally stupid comes along, you'll be forced to cover that, too. Sorry, but you're not doing science any favors. tavi.

                                                        • Jo-Erlend Schinstad
                                                          Jo-Erlend Schinstad  4 months back

                                                          The EM Drive has since been tested independently and they think it doesn't work. But there are still open questions, so the door isn't completely closed. Considering how amazingly amazing this would be, I think it's worth a shot. USA spent almost 700 000 000 000 dollars on the military in 2018.

                                                          • LordOfNihil
                                                            LordOfNihil  4 months back

                                                            jim woodward? you mean the other guy with his own reactionless thruster concept?

                                                            • Bob C
                                                              Bob C  4 months back

                                                              I worked as an technician and engineer in electronics for most of my life and I have learned that 99.9% of the times I investigated things that seemed to break accepted laws of physics were shown to be explainable by using those same laws. If you think you have done something that has dis-proven a law you had better go over all your research and prove out the results, usually you will find a step that is not repeatable - if you can't repeat it it's just not true.

                                                              Better to be thought a crackpot than to open your mouth and prove you are one.

                                                              • Nathan Wilson
                                                                Nathan Wilson  4 months back

                                                                Hello out there! I hope you have a good day. God bless you friend.😊

                                                                • wulphstein
                                                                  wulphstein  4 months back

                                                                  String theory is not credible. E8 crystals, not credible. Parallel universes numbering 10^10^10^.... not credible.

                                                                  • Anton Zuykov
                                                                    Anton Zuykov  4 months back

                                                                    It has been 2019 (almost 2 years since the paper was published and more results were promised), yet no results... Looks like eagleWorks done goofed.

                                                                    • mick mccrory
                                                                      mick mccrory  4 months back

                                                                      The EM drive will be capable of traveling through space at incredible speeds.
                                                                      As soon as it can develop enough thrust to lift it's own research paper.

                                                                      • bobzerocoolq
                                                                        bobzerocoolq  4 months back

                                                                        China Trumps NASA & Isaac Newton –“Mars in 70 Days?” Announces Test of EmDrive Spaceship Travel any update about this?

                                                                        • Jay Ritz
                                                                          Jay Ritz  4 months back

                                                                          your going to steal from people? lmao i hope you don't screw with the wrong people.

                                                                          • DeadShred65
                                                                            DeadShred65  4 months back

                                                                            I haven't done any research but is anyone looking at Thorium Reactor Drives ? Safer and size could be scaled up in low Earth orbit . To make construction easier ??

                                                                            • Alan Machin
                                                                              Alan Machin  4 months back

                                                                              OMG! my skyrim avatar is alive

                                                                              • joelfromportland
                                                                                joelfromportland  4 months back

                                                                                Please do a show on patent US10144532B2

                                                                                • Aaron S
                                                                                  Aaron S  5 months back

                                                                                  Could you put air trapped inside of the nozzle to allow convection?

                                                                                  • bronzedivision
                                                                                    bronzedivision  5 months back

                                                                                    EM Drive is at best a joke and one hopes not too much money has been wasted on it. But it's nice to see you guys go though the motions of a proper analysis since "the inventor is an obvious crank" isn't actually a scientific argument. All the rest of the media is either pretending it's a breakthrough or doing something along the lines of ignoring and/or mocking the EM Drive which while hilarious is ultimately counter productive.

                                                                                    • ernst boyd
                                                                                      ernst boyd  5 months back

                                                                                      a real big interferometer would br affected by patchy intersteller ges

                                                                                      • ernst boyd
                                                                                        ernst boyd  5 months back

                                                                                        those error bars are big why ???

                                                                                        • Yuri Keilman
                                                                                          Yuri Keilman  5 months back

                                                                                          Classical Electrodynamics was improved: "In-Depth Development of Classical Electrodynamics (CED)", General Science Journal, Sep. 24, 2007, by Yuri Keilman. It is more apropriet to apply it to EM drive rather than Conventional CED because it is much closer to violating the energy-momentum law. Especially turn attention to p 12 of above paper.

                                                                                          • Alan Thompson
                                                                                            Alan Thompson  5 months back

                                                                                            So at the rate you want to move man will Never get out into deep space. Test Test Test. Good God, build one, stick it in space and see if it works.

                                                                                            • Allen Goodwin
                                                                                              Allen Goodwin  5 months back

                                                                                              Always a good sign when your objective analysis starts with an attitude of skepticism.

                                                                                              • Allen Goodwin
                                                                                                Allen Goodwin  5 months back

                                                                                                To be clear, I'm not arguing for or against, just pointing out the obvious.