Will This $3500 Katana "Auto-Correct"?

Will This $3500 Katana "Auto-Correct"? - Cutting Test

Рет қаралды 83,294

Күн бұрын

Testing the Sōdai katana by Battle Blades, traditionally made of iron sand, pattern-welded, and differentially hardened with real hamon.
www.kultofathena.com/product/...
The full review video of this sword: • The Most Expensive Swo...
The most expensive swords I've tested and reviewed so far are medieval European ones, mostly by Albion and Lockwood. I was curious how a high-end katana reproduction would perform, so I borrowed one. Special thanks to Kult of Athena and Battle Blades for lending me the Sōdai!
For warmup we cut the usual water bottles (just because they're free), some with a hardwood dowel inside for more resistance. Afterwards moving on to soaked tatami mats, both single and double rolls, most of them with hardwood dowels.
Lots of silly jokes about the katana's meme status in this video, but all lighthearted, with no ill intent. ;)
Also giving you my opinion of the idea that curved blades "auto-align" and help direct the edge during a cut.
The longsword I used for quick comparison:
www.kultofathena.com/product/...
What Makes Swords & Knives Cut Well (Sharpness, Blade Geometry, Etc)
• What Makes Swords & Kn...
** Credits **
"Why Curved Swords Are Better Than Straight Swords" and "Indian Talwar VS Katana! What Slices Better??" by MiniKatanaStore
• Why Curved Swords Are ...
• Indian Talwar VS Katan...
“Imminent Threat” by Matthew Pablo
opengameart.org/content/immin...
Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
“Samurai” by TAD
opengameart.org/content/samurai
Attribution 4.0 International (CC BY 4.0)
"RPG Exploration Level 1" by Hitctrl
opengameart.org/content/rpgex...
Creative Commons Attribution 3.0 license (CC BY 3.0)
Outro:
"Highland Storm" by The Slanted Room Records
theslantedroom.github.io/stev...
Used with artist's permission
*** Time Stamps **
00:00 - 00:37 Fun 'n memes
00:37 - 01:24 First impression of the handling & first cuts
01:24 - 03:32 Does the edge self-align?
03:32 - 04:46 Cutting warmup (water bottles)
04:46 - 08:23 Tameshigiri
08:23 - 09:34 Attacking from the scabbard
09:34 Outtakes
** Merch **
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Help fund future videos, get bonus content and access to an exclusive Discord server:
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Other ways to support the channel by shopping through affiliate links:
Kult of Athena, my favorite online store for reproductions of historical arms and armor, fantasy swords, etc:
www.kultofathena.com/?koa=259
Where to get HEMA gear and practice swords:
www.woodenswords.com/?Click=1799
Want to treat your face fluff? I highly recommend the balms and oils from Beard Sorcery:
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Books about history, martial arts, swords, knives, video/audio equipment, and other stuff I recommend:
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#skallagrim #katana #sword

Пікірлер: 645

@No_Man_Is_An_Island Жыл бұрын

Katana may not do the "Auto-Align," but have you ever considered the ability of Katana to *teleport you behind your opponent?*

@h0m3st4r Жыл бұрын

That's a spell, not a sword ability.

@BWinced Жыл бұрын

@@h0m3st4r Magic attribute of the sword.

@TrungTH1190 Жыл бұрын

@@h0m3st4rYou clearly don’t watch anime.

@sanctumknight3945 Жыл бұрын

Nothing personal kid

@ChadKakashi Жыл бұрын

@@sanctumknight3945 *personnel

@tiacho2893 Жыл бұрын

People that have never tried this: That looks so easy a child could do it. People that actually do this: Done it hundreds and hundreds of times and I'm still not satisfied with my technique.

@ApothecaryTerry Жыл бұрын

That applies to basically any skill 😄

@tiacho2893 Жыл бұрын

@@ApothecaryTerry Yeah. I was imagining every mall ninja thinking, "Really Skall! I could totally do that without scooping the cut!"

@ApothecaryTerry Жыл бұрын

@@tiacho2893 They could! If they could afford the sword and had a few decades of practice 🤣

@mercury2157 Жыл бұрын

@@ApothecaryTerryit ESPECIALLY applies to handling a sword because I guess people think it's as easy as it looks in video games and movies

@mksmike Жыл бұрын

@@mercury2157 Word. I chopped wood only a couple times in my life and I always botched at least half of the swings. And you're only swinging down. With an axe specifically balanced to be swung down.

@ArifRWinandar Жыл бұрын

Here's a way to test the auto-align hypothesis: make a curved sword analog, but replace the handle with a freely rotating round handle. Swing it around, see which way the blade aligns.

@Amhiel Жыл бұрын

I basically wrote the same comment as you before reading yours so I just want to throw my support for this experiment xD

@kathrynck Жыл бұрын

There's no experiment needed. Any time you swing it with more velocity than it would just "freefall" due to gravity, the portion with the weight bias (the spine, on a curved blade) will absolutely lag behind the handle. Or do you already know this, and just want Skullagrim to discover it for himself?

@WaybackFencingClub Жыл бұрын

Tie it to a rope and swing it around at a target and see if it aligns. Katana flail?

@kathrynck Жыл бұрын

@@WaybackFencingClub well then there would be no axis of alignment (no pivot point). And it would no longer behave in a very predictable way. Things would get more into aerodynamics at that point, but at velocities too slow for them to have much impact. It would mostly turn however it happened to be turning when you swung it. I don't recommend this test ;)

@Ashtor1337 Жыл бұрын

It spins.

@outragequitter5027 Жыл бұрын

I love how you can tell Skall doesn’t favor Japanese swords, and even gets to the point of mockery, but you can also see the genuine interest come through. Always fun videos

@THEpsycho404 Жыл бұрын

The mockery is just for comedic purposes, and not towards the blade, but the community, that tries to infer ridiculous properties

@outragequitter5027 Жыл бұрын

@@THEpsycho404 oh you can tell lol.

@FullAdDariusBR Жыл бұрын

Like the Psycho said, this is more to mock weaboos who says that katanas can cut through montains than Skall mocking the blade itself. This sword cuts wonderfully well, but still just a sword like any other, made to cut flesh, not robotics, montains or planets.

@benn454 Жыл бұрын

@@FullAdDariusBR I mean, let's face it, katana weebs deserve it.

@josueroberto7356 Жыл бұрын

8:04 I like the way the sword shines along the edge after the cut lol. Very cinematic.

@ping-a-ling682 Жыл бұрын

this is one of the best videos of "x sword vs y sword" that really demonstrates the point people just don't take into consideration a sword is a sword, it doesn't matter what it is, the only thing that matters is how well you use it

@h0m3st4r Жыл бұрын

Yes. All the yes.

@Sir.Alonne Жыл бұрын

Well yes but actually no. If one guy has a rapier and his opponent has a gladius I know who I'm gonna bet on assuming there's not an absolutely huge skill disparity but with fairly similar swords like katana and longswords absolutely.

@h0m3st4r Жыл бұрын

@@Sir.Alonne Who'd use a gladius with no scutum paired with it?

@Sir.Alonne Жыл бұрын

@@h0m3st4r true

@brendenjohnston7946 Жыл бұрын

But then you have people who bring up the point of “Japanese trained warriors are better” which is just bias and not a lack of knowledge.

@markzuckerberg481 Жыл бұрын

"Will it destroy the planet?" lmao

@Markbell73 Жыл бұрын

No, but it will slice through boredom with style!

@gratefulguy4130 Жыл бұрын

It will keeel.. all life on Earth!!! 🤯

@ChadKakashi Жыл бұрын

He has to go Bankai first.

@Prismatic_Pixie Жыл бұрын

The sword to cut the world in half

@Markbell73 Жыл бұрын

@@Prismatic_Pixie Uh, no. That would be Yoriichi Tsugikuni's Nichirin. Or the katana from One Piece that gets super long.

@williambreazeal387 Жыл бұрын

Your practice has really paid off. Some of those cuts were just beautiful.

@Skallagrim Жыл бұрын

Thanks. Although I felt this wasn't a great day, I've definitely cut better.

@joetheagent Жыл бұрын

I needed these katana based shenanigans today. especially the outtakes.

@grooorglaserdeth8823 Жыл бұрын

"I just channelled the Ninja Turtles, I dunno what to tell you"

@pazitor Жыл бұрын

So satisfying to watch tatamis being sword-sliced.

@kasnitch Жыл бұрын

Nice Katana . Excellent choice of background music ... soothing and not distracting .

@artsy_dragon_creations Жыл бұрын

Every instance I see of people showing the auto-alignment of curved sword they’re holding each end of the sword and the weight then shifts downward and aligns, but both ends have to be supported because otherwise the tip of the sword being off center makes the tip want to point down when you only hold the handle

@kathrynck Жыл бұрын

That's not really the problem. The problem is this: when you just "hold it", gravity pulls "weight biased" side (the spine) down towards the planet. when you swing it down (faster than it would just free-fall), it's in negative-G, and the "weight-biased" side will shift to the top (lag behind the handle).

@artsy_dragon_creations Жыл бұрын

@@kathrynck but that’s not automatic alignment, that’s guided alignment. Automatic alignment would mean that the blade would automatically fall edge first under its own weight. You’re right that it can kind of correct in the cut with guided alignment from a swing, but even on more heavily curved swords that correction is very little. The curve on a katana is so slight that it doesn’t really help unless you already have good edge alignment to start with

@kathrynck Жыл бұрын

@@artsy_dragon_creations "it's only "automatic" if it does it only under it's own weight, not when you swing it" is a stipulation I wasn't aware of ;)

@farkasmactavish Жыл бұрын

@@kathrynck "Automatic" literally means "by itself". So it's not even a stipulation.

@Ashtor1337 Жыл бұрын

So they are holding it and controlling it's direction... No magical auto alignment occurs. Just someones grip.

@stampsu Жыл бұрын

Every time I see the "auto-alligment" shown I do a little inner face palm. Because sure if you drop the sword down without holding it the blade does allign but who in their right mind would throw a cut like that?

@Rabijeel Жыл бұрын

An armless Samurai?

@KoAkaiTengami Жыл бұрын

Its ridiculous to put it mildly. You swing so fast that there isn't even enough time to "auto-align" anyways because once the blade touches whatever you're cutting, you're more or less committing to that angle.

@gameragodzilla Жыл бұрын

The auto-alignment effect is misunderstood. It doesn't auto-correct your aim while you hit something, it's a subtle effect where the curve causes drag that can allow you to feel the edge better during the swing, akin to a weather vane. Scholagladatoria mentions this effect as to why some swords with completely cylindrical handles, which is normally bad for edge alignment, can still be useable as cutting weapons due to this effect. Think of it as a subtle auto-aim feature and can easily be overridden like a console FPS, but it's not a full on lock on system like Goldeneye for N64.

@rotwang2000 Жыл бұрын

@@gameragodzilla Yeah, people seem to hear things like "More forgiving" and decide it's a +5 Holy Avenger now.

@captainbean3114 Жыл бұрын

Says SO MUCH MOTE to me about the handle/pommel than the “shape of the blade” I also love how these people do these tests in lab coats - really cute touch

@dylanwilson7544 Жыл бұрын

Skall didn't miss the tatami.. he gave it a close shave Also that curved blade section should be it's own video!!

@BMO_Creative Жыл бұрын

Skall seems like a great guy to hang out with! You go over his house and the swords come out in the first 30 minutes! LOL

@WunderbredSyndicate Жыл бұрын

But there wouldn't be anything to drink :(

@non-applicable3548 Жыл бұрын

Beers and swords, couldn't be happier

@trumpetwizard7250 Жыл бұрын

It's not a humongous effect but having a curved blade puts the blade slightly backwards and it acts in a similar way to rocket fins (but the resistance comes from the target instead of the air) stabilizing the blade in the target and making it a little harder to "scoop".

@letssee8397 Жыл бұрын

It was really nice seeing you enjoy yourself with good, competent friends who know what they're doing - I really enjoyed this review for their skill as yours and the social interactions

@giedriusgecys5508 Жыл бұрын

Carefull not to split the moon also!

@based_prophet Жыл бұрын

Lol or cut a leg open or labotimize your self that 2hand sword guy cleaved his self n needed 15 stiches yrsterday

@giedriusgecys5508 Жыл бұрын

@@based_prophet oh my, can you elaborate further with relevant link?

@ClaimSuit Жыл бұрын

Or have what happened to that one shopping channel guy with the katana breaking in half and stabbing him while he showcased it

@VioletDeathRei Жыл бұрын

@@ClaimSuit_"I Just Stabbed Myself!"_

@Ozai75 Жыл бұрын

It's almost like both military weapons were designed for the needs of the fighters during both the time period and location. Shocking that they're both effective at what they're made for! /s

@pcfree4994 Жыл бұрын

funny that isn't it? Most katana "comparison" videos I see are like trying to knock down a brick wall with a shovel, then concluding, because that didn't work, that a sledgehammer is better at digging holes.

@nate-otero 11 ай бұрын

I like how skall doesn’t just use his arms to cut but his whole body and it definitely shows in the consistency of his cuts.

@ARGssszzz Жыл бұрын

Like the song, good cuts, nice format. Keep going skal !

@gameragodzilla Жыл бұрын

One thing I was actually wondering from the "attacking from the scabbard" section was whether there were any "speed draw" techniques in HEMA for western swords. The reason is because everyone typically compares swords to handguns since they fulfill the same niche (sidearms in combat and self defense weapons in civilian life), and speed drawing a handgun is a very important skill. Usually when you need a handgun, it's still going to be in your holster so drawing the pistol is a core part of pistol shooting skill, whether it's pistol transitions from your long gun in combat or drawing from concealment during a defensive situation. I always figured a sword would be in a similar situation where the times you'd need a sword, it's still probably starting out in its scabbard, so drawing the sword quickly and smoothly to confront the threat would be important. There were a lot of techniques I saw with the katana for that (iaijutsu), but wondered if there were HEMA equivalents since most techniques I saw seem to assume you have the sword drawn already.

@DerplingKing Жыл бұрын

At least some manuals take this into account. The one that comes to mind is the first guard of I.33 sword and buckler having the sword in a just drawn, just above the scabbard position. I can't think of anything more explicit than that, but I have a fairly limited knowledge of the manuals.

@voltekthecyborg7898 Жыл бұрын

The Russian shaska saber is worn blade up like a katana. I think it's how you draw it (with a double edged sword), as with single edged swords, you just have to wear the blade up

@andrewk.5575 Жыл бұрын

Fiore discusses drawing into a parry in his longsword section. Capo Ferro (I think, it was one of the Italian rapier masters) advises that if you are carrying a rapier and dagger when you are suddenly attacked to go for the rapier first, come en garde, parry their first attacks if necessary, and only then go for the dagger if you think you can do so without compromising your defense. Finally there is the fact that the later French school described its first parry as being the position of a sword that had just been drawn from the scabbard. All in all, the Western material on the subject is not nearly as extensive as the typical Japanese curriculum, leading to two possible conclusions: 1. European sword drawing techniques were passed down orally and have been lost to time or 2. Europeans never developed these techniques to the same extend for cultural reasons. While the first is probably true to some extent, I tend to favor latter explanation as the depth and variety of drawing techniques found in Japan is, as far as I know, unique in the whole world. Every Kung Fu style, Kali, Krabi Krabong, Kalaripayattu, Lashkroba, Furusiyya, and all of the European schools lack an equivalent of iaijutsu. In addition, since you brought up the hand gun comparison, it is worth pointing out that speed drawing of pistols is a relatively late development. Pistols have been around since the 16th century but the idea of specific training for pulling the weapon from the holster quickly does not seem to have existed prior to at least the mid-19th century. Common soldiers did not carry pistols, formalized training for law enforcement (much less civilians) in fire arms handling did not exist, and gentlemen trained for duels with pistols already cocked and in hand. The prevalence of the "fast draw" in the American West is also greatly exaggerated by the movies, but it did occur, largely as a rough-and-ready version of the gentlemen's pistol duel owing to a lack of a directeur de combat, seconds, surgeons, and all the other attendants at a European style duel. Speed draw techniques only seem to have become a standard part of military and law enforcement training during the 20th century, much like how prior to the 1950's pistols were always shot one-handed were as now the two-handed Weaver stance is ubiquitous.

@gameragodzilla Жыл бұрын

@@andrewk.5575 Ah makes sense. And since I am American, I typically thought of pistols furthest back to the Wild West and didn’t consider things too much beforehand. Though I wonder if a lot of this stuff came from the fact that many sword or pistol duels, at least amongst the elite who were more likely to write down their techniques, were more “formal” and therefore assumed everyone would pre-draw their weapons before fighting. Speed drawing would always seem relevant to me in self defense situations against attackers. Possibly the more “low class”, “rough-and-ready” cowboy types as you say might’ve had more incentive to devise speed draw techniques when their duels are less formal and more spur of the moment things, like Wild Bill Hickok vs. David Tutt. And yeah, speed drawing was definitely standard training, or at least a known thing, by the 20th century. Even as early as WW1, Alvin York famously used a 1911 to kill six charging Germans during his rampage and people mentioned that he would not have been able to fight them off as quickly trying to reload and maneuver his rifle. The pistol, meanwhile, was quick to get into action.

@animisttoo3890 Жыл бұрын

@@andrewk.5575 regarding speed drawing pistols. If you think about it, this simply wasn't possible until cartridge ammunition was developed, because if you tried that with a ramrod'n'ball style pistol, you'd probably just sling your bullet out onto the ground before you fired. It would also be dependent on the faster gunpowder that went with the cartridge era, because the older coarse black powder would make speed drawing a bit irrelevent, eh?

@briangriffin9793 Жыл бұрын

really liked this video and the music. Super soothing while engaging.

@andregon4366 Жыл бұрын

The true power of the katana is locked behind the power of friendship. That's why I prefer the Nodachi, it comes with that feature already unlocked. I hate that microtransaction BS.

@TheNCcope Жыл бұрын

Was that a play on the Japanese? By using japanglish?

@GaiusIncognitus Жыл бұрын

Great video. Very entertaining. I hope the views are worth the cost of tatami. The music you used really worked for me. This serene and surreal jrpg loop matched the test cutting, alternating between normal speed and slo-mo.

@whatTheFup Жыл бұрын

Never heard of swords auto aligning before 😂 Nice video Skall, looking sharp

@VacuousCat Жыл бұрын

I like the commentary over footage style here, it's great.

@MercenaryJames Жыл бұрын

This looked like a blast to do. Was also wondering when initially where you got the money to blow on a $3500 katana, until you said it was "borrowed". Very nice of that person to let you use it. I'm nervous just using my $800 sword, let alone someone else.

@cretudavid8622 Жыл бұрын

I always wonder how can they contain such *planet splitting* sharpness in a scabbard....

@JanterCyrano Жыл бұрын

difficultly

@victoriazero8869 Жыл бұрын

The scabbard is equally mystical

@MatildyMatilduh666 Жыл бұрын

The scabbard is blessed by the spirits of the ancestors which keeps the blade's sharpness at bay until the blade is drawn by a warrior deemed worthy by said ancestors.

@andrewk.5575 Жыл бұрын

VERY carefully! Traditional lacquered saya are actually quite fragile and it is common for people practicing iai techniques to accidentally slice right through the wood and into their hand. The ryu I train in emphasizes moving the saya rather than the blade during the draw specifically because it is believed to reduce the risk of this happening. And just to be clear, I am not saying the people in the video are doing it wrong, opinions on the proper way of doing the draw very wildly between different schools.

@Wingzero90939 Жыл бұрын

@@andrewk.5575 do you know if there are any techniques that talk about using the scabbard as a weapon in Japanese swordsmanship? I know by the time we got to the Victorian period, , there are historical accounts of soldiers, whacking people on the head with their metal scabbard of their sabers and and even earlier with guys like Fiore talking about using the scabbard as an off handed weapon.

@strider_hiryu850 Жыл бұрын

"longsword and katana kollided! millions dead!" that was actually really funny 😂😂

@Jay-ql4gp Жыл бұрын

That was interesting, thank you! And I enjoyed the outtakes!

@iangrau-fay3604 Жыл бұрын

Shockingly enough, a well made cut centered sword cuts pretty well with people with a bit of practice. A pretty chill and cool video.

@CaseyBartley Жыл бұрын

I love that you didn't spend time talking about what was better, and just showed two fairly equal weapons.

@josealeksandrovich4154 3 ай бұрын

Wow you guys are really good at edge alignment

@Kvartsb Жыл бұрын

That sound when cutting with the longsword 😍

@Krynis Жыл бұрын

a $4000 sword is a $4000 sword, enjoyed the video.

@h0m3st4r Жыл бұрын

You're paying more for the labor of a blacksmith using almost no modern tools than for the sword itself.

@jirakj Жыл бұрын

This video got me almost as excited as watching the Principe pre-review.

@DemianX6x6x6X Жыл бұрын

man that drawing slash looked VERY satisfying

@CreepyMF Жыл бұрын

Had a great time watching this and the memes where spot on, also the comment section is gold.

@BlackWolf-gh8hr Жыл бұрын

Seeing how the craftsmanship affects so many different aspects of a cut is always fascinating!

@yukikme5041 Жыл бұрын

First time I've seen a video you did outdoors that is this sunny.

@aidan-san3756 Жыл бұрын

The blade geometry just looks amazing even from the other side of a screen ❤

@anysimmers8702 Жыл бұрын

Years of practice has paid off well Skal. The other two are good too and their new I believe you mentioned in a previous video? Nicely done.

@MrPlainsflyer Жыл бұрын

The intro, the thumbnail showing the blond highlights, the awesomeness of the swords, the upset "auto alignment isnt real!!" Tism mini rant, * chefs kiss *

@Jok3rsFaVor Жыл бұрын

Katana does look like a hefty/heavy one without that 2nd spine/blood groove, always prefer the balance on those types more.. Always wanted a $2k+ Katana, some beautiful work out there.. Awesome video!.. 🃏

@lokitakahashi3042 Жыл бұрын

whole lot of cutting and some non copyright mystical music in the background . you really went for the 80's samurai superman movie vibe with this one 😂👍

@littlelegs4563 Жыл бұрын

This video is big balls and will always make me happy.

@Franky_Sthein Жыл бұрын

Great Video Skall, loved the outtakes. Curious to see the actuall testing of the blade. Also very disappointed that no one could draw out its real power, as we all know a good Katana would split the ground even when swung lightly.

@oldncarvingJohn Жыл бұрын

Very, very entertaining. I think your channeling the 3 stooges.

@kalashnikovdevil Жыл бұрын

Nice to actually get notifications for you occasionally.

@tale7955 Жыл бұрын

I love how this isn't even the most expensive a usable katana can get, this is on the cheaper side.

@timoth4529 Жыл бұрын

I really like how skall is usually pretty fair and tries to work against his usual biases when talking weaponry from different cultures.

@kathrynck Жыл бұрын

Not in this case though. But I think it's more of a physics knowledge issue than a bias here.

@Roninfop Жыл бұрын

bro you really got me with the rock slice cold open. i friggen jumped like "NOOOOOO! don't do it! not for the meme!"

@thewrightone13jack Жыл бұрын

This was a fun vid!

@prismaticc_abyss Жыл бұрын

9:01 can we get more Kata lessons from glorious beard-sensei?

@23Disciple Жыл бұрын

He isnt skill enough to train anyone. Exc. me after 8 years of regular training i wouldnt train anyone. I can see weird moves/taisabaki (work with body) from all three swordsmen in presented tameshigiri, but thats probably they are more into HEMA.

@prismaticc_abyss Жыл бұрын

@@23Disciple he isnt training anyone, hes just presenting and talking about stuff on youtube for Edutainment

@TheNCcope Жыл бұрын

I love how he swings the sword directly towards his own leg because he cuts with the wrong leading leg

@Rahhvin 4 ай бұрын

@@TheNCcope This was bothering me with every cut he did. Then he started talking about Iaido kata and I was like "how do you know about that but not how to stand" But we all have room to grow

@anthonycassidy1124 Жыл бұрын

Looking good bro 😎

@SerKGrimm Жыл бұрын

God, I love the way that longsword sings.

@Heulerado Жыл бұрын

I always thought that the "gravity" version of auto-alignment was for illustrative purposes only, and that the gravity is supposed to represent the force of the hands on the handle. If you push a curved enough sword against a target, it would auto-align, because the point of blade contact is behind the "straight continuation" of the handle. If you push a pool noodle against a target, it would curve back in such a way. This would also apply for straight blades that are tilted back with respect to the handle, and it would apply in reverse for forward-curved blades and forward-tilted straight blades. Now, I have never held a sword in my life, but that's what I thought was meant by the auto-alignment. I don't know how much it affects sword-cutting in practice, because it assumes that the only relevant force is the hands on the handle. But of course, sword inertia is way more important, so I can see this effect being negligible, but I don't think it's 100% nonsense.

@droolhd Жыл бұрын

very beautiful cuts

@BH-rx3ue Жыл бұрын

I thought it was a case of "you can feel where the edge is easier" opposed to "auto-align"

@-Zevin- Жыл бұрын

That's a fair point, it's something that I found with a antique Thai Dhab I own, it even has a round grip, which generally is terrible for getting edge alignment, but the grip itself curves in the same direction as the blade, so you instantly feel it, and when the blade is out of alignment you feel the dipping from side to side. It's really interesting and I use this on people who have never held a round grip historical sword, but I hand it to them then tell them to close their eyes and spin the grip a few times in their hand, you can easily align the blade, with eyes closed, even with the round grip.

@Skallagrim Жыл бұрын

The handle shape does that better, but in case of a round handle an asymmetrical blade can help feel the edge alignment, yes. I find it makes it slightly harder *during* the cut though.

@kathrynck Жыл бұрын

@@Skallagrim That's because when you swing it, the weight-biased side changes from pulling down towards the earth, to pulling "away from your direction of swing". It shifts from aligning blade-up (opposite of gravity), to aligning to your direction of movement. When you are not swinging, gravity "auto-aligns" the blade to the sky. When you swing, the weight bias shifts to try to lag behind your direction of movment. I think perhaps you might need a rotating handle and a very curved blade to get a feel for what's occurring. It will rotate spine-down towards the ground. Move it side to side, and it will turn, with the weight biased side (the spine) dragging behind your direction of movment. Swing it fast (much faster than it would free-fall) and it will turn so the edge is pretty close to aligned. Not "perfectly", but inertia will go from fighting you, to assisting you.

@Franky_Sthein Жыл бұрын

@@kathrynck I wonder how the sword from Rurouni Kenshin would behave. After all it is curved but has the cutting edge on the inside of the curve rather then the outside. As its name implies, its cutting edge is where the spine would be. It should make cutting really difficult, since in the story it is meant to hold back Kenshin from turning into a murder happy psycho.

@Skallagrim Жыл бұрын

@@kathrynck If that is a real phenomenon it's too miniscule to really be noticeable. I can tell you from practical experience that edge alignment is no easier with curved blades. The handle shape has much more of an effect.

@XogoWasTaken Жыл бұрын

The auto-aligning theory you talked about here is different to the one I'm familiar with. The theory I've seen doesn't look at a sword that is falling, it looks at weight distribution and point of contact in swing. A curved blade puts the weight (and potentially the contact point) behind your grip as you swing, which means it's going to want to orient itself in line with your swing when you're accelerating the sword (for the same reason you find it flips backwards under gravity) or when making contact. It seems a fairly logical conclusion when looked at in a vacuum. In reality, though, I think you'll get a similar effect with a straight sword as well, since you hold it angled back in your swing anyway. The auto-aligning theory looks at your hand and the sword in a vacuum, ignoring the rest of your body. The only time a curved sword would exhibit significantly more auto-aligning is if you swung with your arm perfectly straight and the blade's hilt perfectly aligned with your arm.

@MaxRideout Жыл бұрын

I laughed - genuinely and aloud - about "WILL IT DESTROY THE PLANET?" at least three times before even clicking on the thumbnail for this video. 😂👏🏻

@abnunga Жыл бұрын

Regarding your curved sword aligning upside-down - I think it's more to do with handle geometry than anything else. Of course, this totally agrees with what you're saying. I think that handle you chose is a great demonstration of what's actually happening with this (flawed) test.

@kathrynck Жыл бұрын

It's handle geometry to a degree yeah. But if the handle were a freely rotating axle, it would alight blade-to-the-sky when holding it still, because the weight is curved off to one side. The heavy side will pull towards gravity. When you SWING it though (faster than it would free-fall) the weight will just try to lag behind the direction you're accelerating it. So it "does" auto-align ...to a degree. Gravity never "turns off", swinging fast makes gravity into a secondary force (instead of the primary force) but it's always going to pull a little bit off angle. But it does "make it easier" to align ...assuming you understand what's happening, and don't get all confused by the fact that the sword was trying to rotate one way when you hold it, and it shifts when you swing it.

@fadingdimension Жыл бұрын

Only $3500? Nah see you need to spend at least quadruple that for the auto alignment feature... dont forget to install the batteries for the gyroscope, accelerometers, lidar sensors, and onboard computer.

@VioletDeathRei Жыл бұрын

Ok not going to lie I want to see a sword with gyroscopes and accelerometers on it now. Need something for forward momentum like a propeller or jet engine.(just realized I'm basically designing that R9X missile with spring loaded blades now lol.)

@CrusaderGabriel Жыл бұрын

"Will it destroy the planet?" Well at the very least it will destroy your bank account

@Skallagrim Жыл бұрын

It will keel your credit card.

@gaddiusgaddium9082 Жыл бұрын

Nice conductor cap, Skall. Very nice.

@madmanthepope6448 Жыл бұрын

This was nice what beautiful swords.

@highlandoutsider8148 Жыл бұрын

" I just channelled the ninja turtles, i dont know what to tell ya" 🤣🤣🤣💀

@-Zevin- Жыл бұрын

Katana do cut really great, but it has to do much more with blade mass and stiffness. It's ironic Katana in video game world are known as these super fast light swords when in reality they are forward weighted choppers with a thick blade, and that blade thickness means very little flex. It kind of reminds me of heavy bullets vs light, a heavy grain bullet will power through tougher structure and continue strait because it carries more inertia, while a less massive bullet may travel faster but is more likely to yaw or even fragment apart.

@eagle162 Жыл бұрын

Katana are not all the same you have ones that the weight are closer to the handle and thinner, katanas actually had some flex to them thanks to utsuri common feature prior to the 17th century, which historical European swords were actually less flexible than their modern-day counterparts.

@-Zevin- Жыл бұрын

@@eagle162 Many Katana had no spring temper at all, and in general they are thicker than many European swords in history.

@eagle162 Жыл бұрын

@@-Zevin-most European swords were not spring temper, again utsuri was a common feature, are we talking about rapiers exclusively because unless we are that's not the case. Even among Japanese swords you can see clear differences, like the two in this video. kzfaq.infoJlZQUFYgxO8?feature=share3

@SoftBoiledArt Жыл бұрын

In Dark Souls they weight more units than comparable longswords so I guess they at least got that right

@h0m3st4r Жыл бұрын

The speed argument comes from the fact that the katana is optimized to slash on the draw, something few other swords of similar size can really do. It's kind of like how revolvers became famed through quick draw duels between cowboys.

@jankarieben1071 Жыл бұрын

Aah! I almost didn’t recognize Skal with that hat! 😂

@mata6669 Жыл бұрын

nice cutting

@valandil7454 Жыл бұрын

Hey you do read your comments 🥳 You gave your kendoka friends a Japanese sword 😄 Honestly though after only 6yrs I prefer my Longsword to a Katana which I've been using for almost 2 decades now. The Katana I have now is a piece of art I got from Swords of Northshire, but my considerably cheaper Bastard Sword that I got from The Knight Shop is better balanced, easier to keep on point and edge on and protects my hand more. Both great swords that I use regularly 🙂

@SucculentDoorbell 2 күн бұрын

I have a special wakizashi which I spent a month reprofiling and polishing since hardly any production shinken are made traditionally. It autoaligns. It feels like pure magic. When held upright, edge facing out, it straightens itself to gravitational true. When placed on flat flooring on its spine in mounting, the blade remains balanced with the edge facing straight up. I call it the Floating Poltergeist or Kazegiri (Wind Cutter). I am now learning how to reprofile a katana in the same way but it is otherWORLDLY time consuming.

@jo3y960 Жыл бұрын

It's interesting seeing both the god cutter and this blade be used on tatami. Its weird how the blade cuts tatami better than the bottles but we'll see specs with full review. Good stuff!

@joshuagrundmann2712 Жыл бұрын

One aspect of "auto alignment" has to do with acceleration, when you accelerate a curved sword as you would when cutting, the offset between the axis of the handle (axis of rotation) and the centre of mass of the blade tends to pull the centre of mass to behind the axis of the handle. Holding the sword loosely confirms this because gravity is analogous to an acceleration upwards, the same conditions as an upward strike. This gravitational effect actually interferes with the auto alignment for non-vertical strikes, the degree of interference depends on how hard you are able to accelerate the sword but i would guess that, since most strikes appear to accelerate faster than a falling object, the auto alignment effect probably dominates the gravitational one. How much of the effect is this physical phenomenon and how much is the feedback the effect gives the wielder is up for debate though.

@oneman9000 Жыл бұрын

As someone who trains with mostly curved blades, the way you are describing it is very accurate. my lineage focuses on a "cage grip" for an extra point of articulation and when I try to swing straight swords the same way, I absolutely feel a turning force that I don't normally feel with a curved one.

@necroseus Жыл бұрын

Hmmm. That makes sense, actually. Neat

@jassianterri Жыл бұрын

I would like to add a little note to the not cutting with the tip. There are schools that focus on maximizing the range and practice cutting with just the tip. Of course, when the range allows for it the more effective cut is favored. 🙂 Cool review!

@a.cameron207 Жыл бұрын

My guess is that the auto align idea comes from the fact that the point of contact near the end of the blade is "behind" the line of the handle, and so when you push into the target it would tend to rotate the blade into alignment. However, I don't think this is going to play any part in an actual cut - the blade is moving too fast, has too much momentum, and has force applied by the person.

@davidstepanek6107 Жыл бұрын

"I just channeled the Ninja Turtles, I don't know what to tell ya!" Skal, 2023

@dominiclapinta8537 Жыл бұрын

You didnt kill the planet currently. But the effects of that katan cutting will be felt in all other earths throughout the multiverse

@benjaminlefebvre220 Жыл бұрын

Extremely relaxing video, I don't exactly know why though

@AsianShadowrunner Жыл бұрын

For *$3,500.00,* it better be smooth as hell in cutting! 💰💰💰 And, lo and behold, it does! Also, you looking as if you were going to cut a huge stone in the beginning almost gave me a *heart attack!* 😳😳😳

@CharlesLaCour Жыл бұрын

I think the idea of auto-edge alignment comes from having the force on the blade where you are cutting is more likely to be behind the center of mass of the blade. This force opposite of the direction of motion will have a tendance to want that point to be lined up behind the direction of motion. The biggest issue with this is that once the force is great enough to do anything to straiten the blades angle of attack that you are far enough into the cut that straitening it is not likely possible.

@kathrynck Жыл бұрын

Any rod with a weight-biased side (which includes a curved blade), or really anything which has a "heavy side" relative to the handle, will align so the heavy part pulls down (with gravity) when holding it, and then shift to having the heavy side try to lag behind when you swing. This DOES result in physics "assisting" with alignment. At least _when_ you swing faster than the sword would free-fall, putting it into negative G's. Put a weight on a bicycle wheel and use an axle as the handle. Hold it out... the wheel rotates so the weight is at the bottom. Gravity right? (when you hold a curved blade still, it aligns spine-to-the-ground) Move it side to side at a slow speed... the part of the wheel with the weight on it will shift to lag behind your direction of movment. Move it really fast (like you're swinging a sword)... the weight will shift to the position opposite the direction you are accelerating it. If you swung fast enough (kept a blade in very strong G-force due to acceleration), then you could have an axle for a handle and it would align "relatively straight" (but not perfect), vs your direction of swing. Absolutely NO testing which fails to include accelerating the blade, will portray this. It doesn't result in perfect alignment because gravity will always try to bias the angle a little bit. But it certainly helps.

@CharlesLaCour Жыл бұрын

@@kathrynck I was mainly commenting on the largest rotational force on the blade which is when it encounters the object you are trying to cut. Another way of looking at this is to look at the torque on the blade handle and the center of mass and ignoring gravity for now. When you have a torque on the handle it will try and accelerate the center of mass in the in the direction of the torque. The inertia of the blade can be idealized to the center of mass and this inertia will oppose the acceleration from the torque, this is what causes flexible materials to flex opposite the direction of the acceleration. This is always the case when you have a torque applied at the end of an object. If the center of mass is not along the axial symmetry of the object the center of mass has two points of equilibrium in this scenario. The is a point of equilibrium that is in the direction of the torque this is an unstable equilibrium; the other point of equilibrium is opposite to the direction of the torque and is the sable point of equilibrium and this is the direction that the center of mass will move to while experiencing this torque. Now let’s look at 3 senecios for a curved blade like a katana being swung vertically before it hits the target: When you are holding it stationary and horizontal the force of gravity is effectively accelerating the blade down and you are accelerating the blade up with a torque to counter this so this torque you are putting on the blade is opposite to the direction of gravitational acceleration. The center of mass will want to go down opposite to the direction of the torque on the handle which is accomplished by rotating so that the curve of the blade is down. If you are holding the blade and just let it fall it is in an inertial referance frame so there is no torque you are putting on the blade so there is no tendency for the center of mass to try and rotate from this and because the center of mass is essentially in freefall (inertial referance frame) no gravitational or torque forces so there are no rotation for these forces. The only force to rotate the blade would be air resistance which is also very small. If you are putting force into the swing, you will be accelerating the center of mass along with gravity but the inertia resisting this is the same and the center of mass will want to move to the stable point of equilibrium opposite to the torque which is in the direction opposite to the swing. Now if the swing is not vertical the analysis is a bit more complicated but the direction of the stable point of equilibrium for the center of mass will be vector sum of the acceleration due to gravity and the negative of the acceleration of blade due to the torque.

@kathrynck Жыл бұрын

@@CharlesLaCour " if the swing is not vertical the analysis is a bit more complicated but the direction of the stable point of equilibrium for the center of mass will be vector sum of the acceleration due to gravity and the negative of the acceleration of blade due to the torque." Yeah, i went into that detail under one of the comments. You'd need a little bit of up-right-ing action on the grip to get it aligned "just right". But yes, the dragging behind on the cutting resistance is likely _also_ a factor. true.

@MundaneMuser Жыл бұрын

LOL I love the thumbnail.

@jeffreyho7484 Жыл бұрын

so much fun cutting with friends

@kennedy250980 Жыл бұрын

The physics associated with an auto-aligning vertical blade is really very straightforward to calculate and a curved blade will auto align better than a straight blade. BUT only if it is falling back first not edge first. A curved blade falling edge first will always rotate flat and if given long enough into a back first. The only other situation where a curved blade would auto align is if you are moving ridiculously fast or swinging it in a viscous medium i.e. underwater. In this case the drag forces on the blade might overcome the moment of the blade’s weight due to gravity. Working out this transition speed would be a fun experiment.

@andrewbattleship2420 Жыл бұрын

Oh, no, Skallagrim! The aftershock waves of this super sword’s swings caused tsunamis in my home town via butterfly effect 🙃

@TheBetterBleedingBladesYouTube 11 ай бұрын

As far as the schuk sound for wooden scabbards (mentioned in the first 30 seconds), I seem to remember that sound in old samurai movies. Interesting, that! Also, I think that sound is possibly cooler than the shing, so yeah.

@necroseus Жыл бұрын

Fucking awesome thumbnail, not gonna lie. It's the perfect mix of funny and good framing. Caught my eye! I must say that the text is super slightly hard to see. Didn't even realize what it said for a moment. Also, very pretty sword! It looks like it cuts well :). I don't know where the auto aligning myth came from. It doesn't seem to be the case. It looks more like it requires more attention to edge alignment for results. I can see a falx-like blade auto-aligning, since it would have the same tendency of that sabre(?), as with axes. (For downward cuts only lol) Okay, so upon reading some more comments, @joshuagrundman2712 pointed out that the auto-alignment would happen in the acceleration of the cut, and that this is actually demonstrated by your loose hold example because gravity is similar (if not identical, iirc) to upwards acceleration. The offset in the shape makes it so the blade tails behind the handle as it is given inertia. Made sense to me, though I don't see it having a super strong effect. It would also completely falsify my statement before about falx and axes! This seems like a cool video idea. Testing auto alignment based on inertia with different blade shapes :)

@faramund9865 Жыл бұрын

I like the new hair and beardstyle.

@lyooyiylklykyokyklky Жыл бұрын

Talking about a katana whilst wearing an anime t-shirt. Good job Skall, that will trigger someone!

@frankharr9466 Жыл бұрын

That looks like it was a fun day.

@insertinsults4567 Жыл бұрын

I just realized a slow mo guys collab would be pretty neat

@Thallarcha Жыл бұрын

This was a cool video

@KoRNeRd Жыл бұрын

Curved blade 'alignment' is what is meant by the feeling of the edge angle, especially when you one-hand (especially on horse back), same with saber, katana, etc.

@markkodryk829 Жыл бұрын

You can endlessly watch three things: running water, fire and a guy cutting stuff with a sword.

@scroogemcdooge Жыл бұрын

I was dying when you said overpowering the swing would destroy the planet. 🤣

@reaper-vi8380 Жыл бұрын

I am afraid, Good Sir, this video has irreparably cut my soul. I will now wonder the Earth searching for a katana to restore my soul and my honor.

@DaedricNZ Жыл бұрын

Thanks for leaving the planet in one piece Skall, it must've taken great restraint and control

@marcogenovesi8570 Жыл бұрын

The real mvp is the beard of the bearded sparring friend

@pieoverlord Жыл бұрын

Hey Skall, next time you do some test cutting, could you do some passing cuts - er sword-wise, rather than basketball. When you're stepping past or side stepping the tatami and striking, rather than from a fixed position.