Medieval Review - Documenting Sword Dynamics - Part 1

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  • Опубликовано: 9 янв 2025

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  • @commando552
    @commando552 7 лет назад +17

    I may be wrong here, but I do not think that the vibrational nodes and the "sweet spot" are necessarily in the same place, although in an ideal sword they should fall at the same point on the sword or at least be close to each other. Assuming that what you mean as being the "sweet spot" is the centre of percussion, this is not determined by vibrational nodes, and is instead the point on the sword at which when you strike it the sword rotates around your point of grip, as oppose to forcing your grip point forwards or backwards creating hand shock.
    You can find this yourself but it would be a bit tricky in a practical sense. The best way that I can think of would be to cable tie a keyring ring to each side of the grip of your swords at the grip point and suspend it from a pair of tight wires. Then if you strike the base of the sword with a wood baton the sword should slide along the wire in the direction of the strike. However, if you strike the tip of the sword the sword will actually slide towards the direction of the hit. The centre of percussion is the point at which when you strike the sword it rotates at the grip point without sliding along the wire in either direction. I'm not sure, but I think that this might also be in the same location as the first rotational point your found, as it is measuring the same thing but coming at the problem from the other direction.
    The vibrational nodes are important, but more in the case of cutting performance. If you are cutting with a part of the blade which is not a node, it will have higher resistance to the cut as the sword is wanting to move inside the target creating extra sideways pressure and hence friction, and it will tend to want to yaw off to the side ruining the edge alignment.

    • @medievalreview
      @medievalreview  7 лет назад +10

      You are correct. If what Iw as saying didn't come across clearly I apologize, the idea is that the vast majority of the time these places will align (or at least be a rough approximation of location on the blade. I'll pin this comment so people can see that there is a technical difference, though in general use (non-scientific) they can many times be considered the same spot. (ie. usually somewhere in the top 3rd of the blade)

  • @chinatosinthiti3076
    @chinatosinthiti3076 7 лет назад +1

    Thank you very much for presenting this! It's very good, I'm an engineer and a beginner in blacksmithing, sword collecting and martial arts. Further studying on this will be very useful!

  • @jamiecorrigan3241
    @jamiecorrigan3241 3 года назад +2

    For Anyone With An Interest In Viking Age Or Medieval Swords They Really MUST SEE 'The Viking Sword What It Was And Was Not' By Peter Johnsson Here On You Tube. Mind You, It Would Be Better Titled As 'PETER JOHNSSON EXPOSES HIMSELF ON YOU TUBE' If This Video Does Not Go VIRAL There Is No Justice, But If You Do Watch It Be Sure To Read The Newest Comments FIRST.

  • @ktoth29
    @ktoth29 7 лет назад

    So what I got out of this is that the corresponding center of motion in the handle to the vibration node in the blade is the fulcrum and I should grip the sword so that it equidistant between my hands as a general rule, choking up so that it is under my left when I want more agility and choking down so that it is under my right when I need more power

  • @epic0wnag
    @epic0wnag 7 лет назад

    I have been waiting for this for six months. I already measured my sword with the tool and I am waiting for the future videos to see how I can make a nice looking graph with my sword on it.

  • @ZarlanTheGreen
    @ZarlanTheGreen 7 лет назад

    13:36 Just a little nit-pick:
    That's not where the hand would be, however, if you place the back hand, on the pommel (Liechtenauer tells you not to hold the pommel, but Fiore and some other masters, don't seem to mind)

    • @medievalreview
      @medievalreview  7 лет назад

      The back hand (left hand for me) can move around. There are manuals showing people gripping against the right hand. so I call it variable. for the purposes of a leverage point in this form I don't use the pommel.

    • @ZarlanTheGreen
      @ZarlanTheGreen 7 лет назад

      As you say, it's variable ...and I'd say that the spot you choose, is a good choice for where to measure the back pivot point.

  • @ThatBeardedWhiteGuy
    @ThatBeardedWhiteGuy 5 лет назад

    As a newbie collector that's the kind of info that I'm glad to learn from ! Thank you sir !

  • @ZarlanTheGreen
    @ZarlanTheGreen 7 лет назад

    On the edge plane vibration node: Vincent Le Chevalier has commented that, aside from being difficult to measure, it doesn't really effect cuts or anything, that much ...so he sees little point, in including it.

    • @medievalreview
      @medievalreview  7 лет назад

      Yup, good conversation about this here: myarmoury.com/talk/viewtopic.php?p=320199#320199

    • @ZarlanTheGreen
      @ZarlanTheGreen 7 лет назад

      Yeah, that's where I got it from.

  • @mpsmith47304
    @mpsmith47304 6 лет назад

    Great video.... I wanted to note something that kind of comes up a lot in your narration.... the use of the terms "mass" and "force", and the missing concepts of kinetic energy and momentum. Mass is a static property. It does not change. FORCE is defined by F=ma, that is Force= mass(acceleration). I won;t say force doesn;t matter, but it's not all that important here. What we are interested in really are the concepts of energy and to a lesser extent, momentum. Kinetic energy is defined by KE= 0.5mv^2. So the total kinietic energy a sword can deliver is defined both by the effective mass at the point of impact and the velocity the sword is moving. The velocity term is squared, which means that it is not always better to have more mass at the point of impact, but limitations on what velocity can be achieved and material means that a very low effective mass moving very fast is not really the best answer either. Momentum is defined by p=mv. Like KE, it depends on both effective mass and velocity, though the velocity term is not squared, making the mass more important. Momentum is important in considering whether a sword would be effective in guarding. So knowing where you highest effective mass is (at the COG), gives you the best bast to make a static block, if one has to. Once one STRIKES the target, the amount of energy transferred is of important. That's where the sweet spot comes into play, since any energy put into making the blade vibrate isn't transferred to the target. Anyway, I got the sense you intuitively understand these things, but you search for the terminology a bit. But kudos to you for using SI units. The math is much easier using SI units.

  • @awsomemills123
    @awsomemills123 7 лет назад

    By no means am I any expert in this field and I really enjoyed your video on armor and shads on the sword; I'm simply writing an essay on the history of swords, but at 4:58 did you use a picture of a knock off ulfberht sword? I've read that the real quality ulfberht had H+T, and not HT+. Can you clarify? Also do you have any theories on how they were able to get such pure steel for these blades ahead of anyone else in this area.

  •  7 лет назад

    Im gonna try this with my Sundanese Golok, wich for me is intresting because i have trouble classifying it as either sword or knife, it is somewhere in between and i Think that if all these measurements are not possible to do on it (like i kindof guess they are not) im going to conclude that it is a knife. Especially vibration nodes will be hard i Think since it just might be to short and stubby to produce much in the way of vibration.

  • @BekoPharm
    @BekoPharm 7 лет назад +2

    Funny. The thought of creating an online tool for this crossed my mind. It's actually an expertise of mine.
    Oh and the book 'The Sword - Form And Thought' is simply gorgeous. Obligatory for any sword nutter. Imho.

    • @BekoPharm
      @BekoPharm 7 лет назад +1

      An advice when half-swording: Missing the sweet spot when half-swording with force hurts. A lot.
      I learned this on a sturdy pell.

  • @MattsGreatHall
    @MattsGreatHall 7 лет назад +7

    Shad sent me here -- love this stuff. Great topic.

    • @phulocnguyen3986
      @phulocnguyen3986 7 лет назад

      Me, too

    • @skylerstevens8887
      @skylerstevens8887 4 года назад

      MAAAAACCHHHHHIIIIICCCCCCOOOOOOLLLLLLLLLLAAAAAAAAAAAAAAAATTTTTTTTTTTTTTTTTTTTTIIIIIIIIIIIIIIIIIIOOOOOOOOOOOOOONNNNNNNNNNNNNNNSSSSSSSSSSSSSSSSS!

  • @HandleDisliker
    @HandleDisliker 7 лет назад

    I am curious. (labeling random items different letters warning). If
    hilt point = H (hilt center)
    "Pinkie" pivot point = P (pinkie point)
    Vibration nodes = V (Vibration)
    does PH=PV on all swords? I noticed that on my (rubbish) sword. Is that the same everywhere else?

  • @Evker0
    @Evker0 7 лет назад

    Something I'm curious about. Would there be any benefit to actually marking pivot points or nodes on a sword? Perhaps as reference points when practicing or for beginners to gain a faster understanding and comfort.

  • @christophe7723
    @christophe7723 7 лет назад +1

    Very interesting, I will give this video to two sword sellers I know.

    • @medievalreview
      @medievalreview  7 лет назад +2

      The 2nd and 3rd video in the series will be more valuable for that audience, but this will be a good place to start for them.

  • @YaezLeader
    @YaezLeader 7 лет назад

    what is that sword on the 4:29 image? i really like it. where is it from? where can i get it? i need some info

    • @medievalreview
      @medievalreview  7 лет назад

      www.fableblades.com/HeronsFlight.html

    • @KingBobXVI
      @KingBobXVI 7 лет назад +1

      Ha, they actually listed both centers of percussion (the vibration node) on their description!
      No points of rotation though, just shy of being able to plug this into the calculator just from their site information :P

  • @ZarlanTheGreen
    @ZarlanTheGreen 7 лет назад +1

    I'd love to see museums and sword manufacturers and sellers, start giving not only the length and weight of swords, but also the point of balance, centre of percussion, pivot points, vibrational nodes ...and also Sword Dynamics graphs.
    Also a graph that shows the weight distribution.
    I.e. a graph going along the length of the sword (just as the effective weight graph), that shows the weight *of that specific point* along the length of the sword.
    I'd like to see Albion Swords, start to use the method that their sword designer helped create. They should really be the first to do so, not letting anyone else get the jump on them. (except the Solingen Klingenmuseum, who had the exhibition where the graphs were first introduced. I'd be deeply disappointed, if they've taken the graphs down, now that the exhibition is over)

    • @medievalreview
      @medievalreview  7 лет назад +1

      There are some inherit dangers with these graphs from a manufacturer/seller standpoint, I plan on covering this. This is going to be a long video series. =)

    • @ZarlanTheGreen
      @ZarlanTheGreen 7 лет назад

      I can't see why there'd be any problems, but... I'll wait and see.

  • @shilelea
    @shilelea 7 лет назад

    Once we get Cain to tell us what our sword is. Then we can see how much dexterity it adds.

  • @siestatime4638
    @siestatime4638 7 лет назад

    I don't know why it took me so long, but I suddenly realized how the effective mass graph could be derived using two kitchen scales. Finally, I understand the significance of the effective mass graph. I'm a little slow.

    • @medievalreview
      @medievalreview  7 лет назад

      Yes, that is how I originally built by effective mass curves manually.

  • @SebastianSzukalski
    @SebastianSzukalski 7 лет назад

    I seem to recognise a lot of these photos from some albums I've made

    • @medievalreview
      @medievalreview  7 лет назад

      Credits for album at end of video. If these are yours and you would like more specific credit I can give it to you. Please let me know.

    • @SebastianSzukalski
      @SebastianSzukalski 7 лет назад

      hah, yeah that is one of mine. Feel free to use it, that's why I make them.

    • @medievalreview
      @medievalreview  7 лет назад

      Now I know who you are then... you fell for the Honey Pot!
      just kidding. I bookmarked those wonderful images for just these occasions.

    • @SebastianSzukalski
      @SebastianSzukalski 7 лет назад

      Medieval Review Not much of a secret, I'm on myarmoury with this name (misspelled, but whatever).
      They're fairly useful reference material, but the latest album is 3600 images and just crashes any device I open it on.

  • @jedh3721
    @jedh3721 7 лет назад +1

    So I have a serious question that sounds a bit silly. Is there a way to/ what do I need to do to do this with my cane? I do a bit of cane fighting, and I noticed that the vast majority of the techniques are reflections and blatant copies of arming sword techniques. So I am really curious how well my primary aluminum fighting cane is designed. and how it compares to other swords.
    some stuff is easy like the pivot points, but I have no idea how to get the vibration nodes, how to take the J-hook handle into account, whether the fact that it is hollow needs to be considered, etc. Any help would be appreciated.

    • @medievalreview
      @medievalreview  7 лет назад +2

      Joseph Huckaby this can be applied to any hand held weapon, be it and axe, mace, or a cane. some aspects won't translate as it is focused on swords. you can certainly get a lot of the information. I have not taken the time to test against my own stuff. now hat this video series is done I may have to do an appendix where I test different things.

    • @jedh3721
      @jedh3721 7 лет назад

      Read this a while ago, but I forgot to thank you. so thank you. :)

    • @ottopike737
      @ottopike737 7 лет назад

      Medieval Review
      I respect that you pinned a comment that critiqued your video. that's a very rare thing in my experience.

    • @jedh3721
      @jedh3721 7 лет назад

      Very off. Haha,
      Cane fighting if more of a systemized conglomeration of various Japanese and European swors techniques. How much of each depends on the teacher. Since I noticed that the American Cane System was essentially just arming sword techniques, I dropped it and just practice off of old manuscripts. The J-hook does add its own unique uses though.

    • @jedh3721
      @jedh3721 7 лет назад

      A cane may not take your arm off, but it sure will break it. Especially mine. I have a very heavy aluminum cane I use for fighting. Even a hard wood cane will easily end a fight. Mine is heavier and harder.

  • @adwarfsittingonagiantsshoulder
    @adwarfsittingonagiantsshoulder 7 лет назад

    I'm glad to see that a sword graph generator is now accessible to the public.
    But I'm non the less a bit sad that all of our hard work on Excell and Geogebra was for nothing.

    • @medievalreview
      @medievalreview  7 лет назад

      Not for nothing, I used it for my reviews in the interim and I do know of others who used it.

    • @adwarfsittingonagiantsshoulder
      @adwarfsittingonagiantsshoulder 7 лет назад

      I didn't realize it was of use for your reviews (I really like those, and helped me choosing, or in some cases not choosing a sword).
      Anyway, nice explanation video.
      Best regards.

    • @medievalreview
      @medievalreview  7 лет назад

      Yeah I use it to generate the graph, then I take it over to Inkscape to make a final version.

  • @CedarloreForge
    @CedarloreForge 6 лет назад

    I’m honored that you used photos of my work as example swords in this video! I will be honest though that I think it’d be ideal if you could give credit to all of the swordsmiths you used work from in the video?
    Great job on the video otherwise 👍

    • @medievalreview
      @medievalreview  6 лет назад +1

      Oh no if I used a photo without permission it was certainly a mistake. Can you give me a time code, and I will be glad to give credit.

    • @CedarloreForge
      @CedarloreForge 6 лет назад

      Sorry for the slow reply!
      Its really no big deal at all. One of my swords was used at minute 4:22 and another at 4:48
      Granted, both swords were made a few years ago, and are not the best representations of my current work which has changed (for the better) a lot as I've grown, and my quality-standards have increased.
      But I'm flattered by the use of the images in the video. ;)
      Thanks again!

  • @brumalogresteer4124
    @brumalogresteer4124 7 лет назад

    you might want to waggle it faster, so you can see the pivot points easier.

  • @i_love_crpg
    @i_love_crpg 5 лет назад

    Im assuming this video is strictly about european swords?

  • @HebaruSan
    @HebaruSan 7 лет назад

    Does Vincent's name mean "Vincent the Knight"?

  • @PontiMAC
    @PontiMAC 2 года назад

    This sound like a tennis racket dynamics study.

  • @Geerladenlad
    @Geerladenlad 7 лет назад

    Are manufacturers making this info public? Even if one knew what they were looking for how else could you tell without purchasing the weapon or watching a review?

    • @medievalreview
      @medievalreview  7 лет назад +1

      This is going to be a topic later in this series... it's gonna be a long series.

  • @marcelosilveira2276
    @marcelosilveira2276 7 лет назад

    and what do people of the time think about how swords should be?

  • @AGermanFencer
    @AGermanFencer 7 лет назад

    Cant like this enough! Moar!

  • @macmurfy2jka
    @macmurfy2jka 7 лет назад +2

    Seems like a great tool to use in game dev. Nice. A more accurate sword in game will be a more fun sword in game.

    • @a_wild_Kirillian
      @a_wild_Kirillian 3 года назад

      Not really. Although I like the intricacies of reality, the media of games doesn't suit it. You know, like in hand-drawn animation you skew and smear the drawing. It's not realistic but it gets the idea through. Games have to do things like that too too make it feel right. Like coyote jump

    • @macmurfy2jka
      @macmurfy2jka 3 года назад

      @@a_wild_Kirillian I understand about the mechanics needed to make games work, but how is better understanding things like center of mass, and proportions of real weapons not applicable to game design. Any asset that is designed needs or have physics parameters that guild the experience in game. If it was so intuitive swords wouldn’t act like uniform iron bars or massless lightsabers like they do so often, right?
      Look, I understand that immersive simulator like accuracy isn’t always needed in a game, but it sure would nice in others right?
      Imagine if you would a cut scene where you character slays a sword wielding foe and they drop their weapon. The sword could drop to the floor and clatter around vibrating like a real sword would for dramatic effect. Think of the scene in Harry Potter and the Sorcerer’s Stone, where Ron wins in real life wizards chess.
      Or imagine if a character is checking the quality of a sword, by smacking it on the flat to see it’s nodes of vibration and in the act catching a cheating merchant. Or if the character when buying a sword smacks the sword to find the sweet spot, illustrating the place where damage multiplier is highest for the player.
      C’man that’s exactly the type of thing Geralt would do in a Witcher game.

  • @OfficialGamingPeople
    @OfficialGamingPeople 7 лет назад

    I see you've been on /r/wma recently.

  • @DiiExport
    @DiiExport 7 лет назад

    instagram.com/p/BSkMmUmAscX/?taken-by=thatbigleykid&hl=en Here is some of them i have alot more there mainly for show not use

    • @medievalreview
      @medievalreview  7 лет назад +1

      Heavy Metal Sword, a few KitRaes, they are decorative, but for the price, you may have gotten your money's worth.

    • @DiiExport
      @DiiExport 7 лет назад

      Well i have like 10 or 15 more swords and like 400 more knifes still gatta wait tell i go back up to get the rest next week

  • @iamscoutstfu
    @iamscoutstfu 5 лет назад

    After using the pommel grip I cringe any time I see someone with two hands on the wrap. Physics says pommel grip is best grip!

    • @medievalreview
      @medievalreview  5 лет назад +1

      The physics surrounding the act of cutting does call it into question. A lot of success can be garnered through more consistent rotational motion by having have close together. I think this is generally seen as a trade off between generated force and controlled strikes.

    • @iamscoutstfu
      @iamscoutstfu 5 лет назад

      @@medievalreview consistent? You mean edge alignment-wise?

    • @medievalreview
      @medievalreview  5 лет назад

      @@iamscoutstfu in part, but also the motion itself. It ensures the rotation stays in a proper arc, and no force is lost in poor cutting mechanics. It's one of those thing where in HEMA is makes sense to use a wide grip and pommel because there are not really drawbacks, but if it were applied in cutting mechanics and/or actual combat, it would have an impact. The book "Cutting with the medieval sword" by Mike Edelson goes into these concepts.
      Keep in mind what we are talking about is applied to move toward perfection in body mechanics, and may not have as material an impact to performance as just being generally comfortable with a sword. It's the kind of theory that gets applies with top of the line golfers who want their drive to go further and their accuracy to the green better... Where really they're going to smoke the competition either way...

    • @iamscoutstfu
      @iamscoutstfu 5 лет назад

      I feel as thought that would only have an appreciable effect on new fighters. I only have my own experiences with cutting to go off of, but I haven't noticed appreciable diminishment of the quality of the cur just because I hands out.
      If the pommel itself is non-faceted and of the round sort, I could see that maybe having an impact, I suppose.
      Also, this wasn't meant as a critique of yours or anyone shand placement. how one holds the sword is up to them, within reason. I was just stating it makes my teeth itch when people willfully shorten their lever, lol.

  • @s.w.4409
    @s.w.4409 7 лет назад

    13:31 "Like a normal person" ?!? *ARE U SAYING A LEFT-HANDER IS NOT A NORMAL PERSON????!!!*
    ...jk ;)

    • @JimGiant
      @JimGiant 7 лет назад +2

      Being superior isn't the norm.

    • @s.w.4409
      @s.w.4409 7 лет назад

      Indeed.

    • @BekoPharm
      @BekoPharm 7 лет назад

      Well played, Sir :)

  • @andrewprahst2529
    @andrewprahst2529 2 года назад

    Moosic

  • @Zulikas69
    @Zulikas69 7 лет назад +15

    *Pommel throwing comment*

  • @ercluxior
    @ercluxior 7 лет назад

    You lose weight?

    • @medievalreview
      @medievalreview  7 лет назад +1

      ercluxior Yes.

    • @ercluxior
      @ercluxior 7 лет назад

      Medieval Review congrats! I'm trying to shed a few myself. not easy man, not easy.

    • @medievalreview
      @medievalreview  7 лет назад

      ercluxior yes it does... I'm the fittest I've been in a long time right now.