I Built a Transparent Katana

[@MikeShake]

I'm thinking about improving V1 of the sword, which is obviously going to cut better because of the thinner profile, and making another video comparing that with a real katana. I was also swinging the final sword like a bat, because it lacked cutting abilities but it had a lot of power. Anyways Let me know if you’d like to see an improed version of V1, in which I fix all the mistakes I made, including a better slicing technique! Edit: I’ll do it Ps: the reason I kept the katana that thick, is because it would otherwise bend just with gravity. So the improved version of it is going to be shorter, kinda like a real sword.

[@Eirenband]

)

[@foxshot8967]

Yes! I'd love to see how well that version would cut! You could easily make a functional cyberpunk katana with some clever use of LED lighting.

[@catfella]

13 minutes ago

[@ProtoLifes]

V1? ULTRAKILL MOMENT??

[@JKim-g1f]

u forgot to do the hardness 100/10 cutting test which is against itself, polycarbonate.

[@ewen59gaming50]

The fact that the blade is so thick that it reacts like an thin hammer and not a katana. It do not cut but completely smash the objects !

[@petermgruhn]

The fact that his stroke is baseball bat smashing, not cutting.

[@joedingo7022]

Yeah, the first blade would have likely cut much better, even if it's far less transparent.

[@jimmyrk3]

@@joedingo7022 I want him to test the first blade. It would;ld have to be a better cutter, but maybe not as robust...

[@Sharp.Penguin00]

It's mostly the taper off the edge and somewhat the thickness of the whole "blade" Just as in regular cutting. It's behind the edge thickness. A thin but completely dull knife will still cut through most things while a thick but razor sharp knife will have a very hard time going through an object

[@VincentWessling-fj9fl]

Correction “a” thin hammer.

[@Duckrabbit_Forging]

As a bladesmith, this pisses me off. As a bro, this is freaking awesome. Mike, if you see this, i can probably answer most of your questions about knife/sword/weapon making.

[@fluppet2350]

The concept is pretty cool and Many of the most egregious flaws can be fairly easily fixed with help from someone who knows what to do. It would definitely be interesting to see another attempt with a little more knowledge behind it.

[@EyesOn-Me]

Oh yes👀

[@matthewmarting3623]

It’s a pretty good impact weapon, it just won’t cut. It’s effective, it’s nearly invisible and it’s durable. I was impressed as hell that he started freehand grinding those first sword bevels halfway through. Those steep bevels on the second one saved it from being destroyed.

[@ryanlundgren]

As a photographer/videographer, I wish he used a circular polarizer.

[@nicholem1450]

@@ryanlundgren as a pineapple i wish people would stop cutting us in half for sword videos

[@siringc]

"Have you ever seen an invisible sword?" Well no, it's invisible.

[@Blxde420]

HOW THE HECK IS THIS TRENDING IN AUSTRALIA BRUUUUUUHHHHHHHHHHHHHHHHH

[@marksilang4518]

I mean, you have a great point😂

[@sandwich4916]

EX...

[@BowserGaming-v6m]

HAHA HAHAHA HAHAHAAAAA!

[@stevenmerrell5565]

"Great, you killed the invisible swordsman!"

[@Maybeitsco]

As a licensed optician, I can tell you that the buffing wheel with some polish will give you the results you’re looking for with the transparency on the edges. You won’t have to go through 200 hours of sanding. The first katana you made, it was what we call a prism.. you essentially made 1/2 a plus lens. Apex on the edge and a base in the middle. Honestly, polycarbonate is good, but if you can get a sheet of trivex… it would be stronger than polycarbonate. 😊

[@richardashendale922]

But could he make something like the first one without that light distorting prism effect? Fact is, what he ended up with was more of a mace than a sword due to the short robust edge. But I am not sure he can have a transparent blade without that.

[@christop3]

lol I love how almost perfectly in a row. As a bladesmith As a licensed optician Mechanical Engineer here. Got the homies all coming out to improve it 😂

[@Maybeitsco]

@@richardashendale922 he would have to make a prism (having an apex and a thicker base) in order to make the edge. Maybe by creating an apple seed edge may change the geometry enough to create a different prismatic effect. But regardless, a convex side with a concave edge is going to create a refractive surface. Hope this helps.

[@jammybap]

The right angle you cut into the blade where the handle and blade meet is what caused the break, not the added thickness of the handle. The same thing happens with steel weapons - they call it a stress riser. A rounded transition from handle to blade would help avoid it.

[@MikeShake]

Interesting! Thanks!

[@chstoney]

@@MikeShake to get a nice round transition easily and quickly, drill holes in the places where the cuts are supposed to meet, and then cut the material.

[@king_the_titan8]

@@chstoney well if you do that it would be almost impossible to polish so it won't be a invisible katana anymore

[@Sharp.Penguin00]

Didn't he still have the right angle (stress riser) when he redid the handle? I was thinking the same thing until he cut the handle in again

[@evanli421]

@@king_the_titan8 guy meant drill a large hole to create a fillet Edit: google "fillet machining" if you don't know what that is

[@Rowrowthegravyboat]

A true bladesmith does not make mistakes. Just smaller knives. I’d like to see a test with v1 too. I know it didn’t match the title of the video, but your blade geometry was significantly more conducive to cutting through stuff.

[@conifergreen2]

And that small rounded part like in the teeth of T rex.

[@bubby6858]

Real blacksmith here. That's just bs. A single mistake can ruin the whole blade. There is no "just smaller blades"

[@AGamersWorld1993]

I actually think the V1 blade looked badass, and the distortion looked like something from a sci-fi movie.

[@artsyvids2563]

A crystal blade like that is cooler anyway!

[@dipf7705]

​@@bubby6858 unless you get it too hot, couldnt you just keep making it smaller to remove mistakes? Just curious

[@smookiexx]

“Where did I put that katana? - OW!!”

[@X_Factorrrr]

lol

[@davidsaunders2893]

Mechanical engineer here. By making a 90 degree angle between the blade and the tang in the handle you created a stress concentration there. Abrupt changes in geometry like this create localized stresses far greater than the average stress, hence why your blade snapped there. Fun video!

[@t_g_gamerftw5075]

Also, If I'm remembering correctly the flexibility of the material allows for better energy dissipation and lower impulse as the flexibility delays the force by storing energy in it's waves thus increasing the time it takes for all the force to act on the blade. So sandwiching it between two pieces increased the materials inflexibility at that point, and the flexibility along the axis of the beveled edge isn't good either due to it's thickness, so most of the force along that axis would have been transferred to the tang in a short amount of time, putting it under much greater stress.

[@kyjohns8271]

So would it have been better just to paracord wrap the tang itself ??

[@davidsaunders2893]

@@kyjohns8271 If by the tang you mean just the base of the blade (without cutting it), then yes! That's basically what he did in the end by just wrapping the base of the blade with a towel. If you mean keep the 90 degree angle and just wrap the smaller part, then no, the abrupt change in geometry is what induces the higher stresses. If he still wanted to cut the base of the blade to make a handle, he could have reduced the stress concentration factor by rounding the corner where the tang meets the base of the blade with a "fillet." The larger the radius of the fillet, the lower the stress concentration factor. In other words the more rounded the corner, the lower the peak stress caused by the change in geometry. The stress would still be the highest at that point, but it would be much less extreme than the stresses caused by the 90 degree angle he made.

[@billymanilli]

Yup. I was gonna say the same. I was saying to the screen while watching him make the rough cutout, that it needed some fillets in there! lol

[@ruebenmikoch]

Yes

[@HappyJackington]

The biggest reason your handle snapped off is the geometry of your sword. Having those sharp interior corners creates a stress concentrator. It's like if you have a 10 lane highway suddenly shrink into a 1 lane country road with no transition. All the cars (stress lines) have to bunch up at that point, cramming into that tiny area with no easing into it. It works when traffic is low (like swinging the swrod through the air), but the moment there's any serious traffic (like hitting the pineapple) there are too many cars trying to go into that 1 lane. For the cars, they just can't move anywhere, for your sword, it breaks. You will always run into this issue with making the grip smaller than the blade, but adding internal radii or some way to gradually reduce the size, will help to prevent this failure in the future. That will always be your point of failure on a sword made out of a single material. Katanas, even though they are made from one piece of steel, have different hardnesses at different parts of the blade and grip effectively making them multi-material sword. I bet you that if you were to take your V1 sword, even though it is a sharper blade, you will have the handle snap off even if you don't make the handle thicker. It's just a nature of your sword geometry and really only something you can learn from spending too much time reading books, or breaking things like your doing, which is how the books were written in the first place. I also don't want to invalidate your own discovery of adding material to the handle making it stiffer and contributing to the blade breaking. That is definitely a part of it and an awesome insight to have found. I just want to highlight that your 2D geometry has as much a roll in the strength of the blade as the 3D geometry does.

[@samp1501]

It’s actually most likely due to the fact that most superglues react with polycarbonate to make it brittle.

[@amosdotl6892]

@@samp1501 I'm of the reasoning that while the polycarbonate is able to flex along the flat edge, by hitting the material from it's most rigid side will always transfer more energy into the blade with nowhere to go but its weakest point.

[@edvonrattlehead2135]

@@amosdotl6892 is a combination of everything, he needs to remove some material to turn the sharp inner corners of the blade handle transition into round corners, for the handle 2 scales of polycarbonate are okay but only gluing them to each other so they encase the handle and then hold it with a polycarbonate pin so if shit hits the fan the polycarbonate pin breaks.

[@Fluquids]

🤓

[@Whiterin]

Good comment! I was going to point out the sharp angles where the handle meets the blade as well. There's a reason real, properly made swords are rounded there.

[@davidbucklen-blacksmith5402]

15:02 swordmaker here. When you make a sharp transition like between the tang and blade you create a stress riser. You need to create a round transition.

[@robinlundh3962]

In this case it’s a cemical reaction to superglue. The ”ice effekt” in the handle are multiple micro cracks.

[@profezzordarke4362]

@@robinlundh3962 That's not what he was talking about. What he is talking about, that in the area where the blade becomes the part of the handle, there is stress on the inside corners. If you ave steep angles in there the item can start cracking in those conrners and the blade snaps off. You need to keep these inside corners as round as technically feasible to avoid those stresspoints.

[@robinlundh3962]

@@profezzordarke4362 Pollycarbonate does not have the same mecanic disabilities as metal. It would only bend easier when narrowed down and you could do sharper cornering than this and it would not crack. Unless you cemicaly change the capabillity of the material, in this case with superglue. Superglue made microcracks all along the handle and it broke exactly where the material was no longer trippled in thickness. Rest of the movie it worked fine. Even narrowed down on the sander. Superglue is the culprit in this case nothing els. If it were steel. I would agree with the swordmaker.

[@420StepsFromHell]

​@@robinlundh3962 wrong. Stress risers due to sharp internal corners occur irrespective of the material.

[@balrog99-41]

The "cracks" that you refer to are in the handle itself, and the point of breakage is right before the guard, meaning it wouldn't make physical sense to break there instead of along the handle shaft where these "cracks" are. Furthermore the "cracks" are along the length of the shaft, while the breakage is perfectly perpendicular to it, exactly how a stress riser point breakage acts. Also, I say "cracks" because those are not direct deterioration of the poly through chemical reaction as you say, but simply weird light angles on the dried glue between the 3 total sheets of pol, causing a lot of refraction and reflection and the cool effect. Glue can't erode poly. The full structure would be in all fairness actually stronger, especially since the glue as a bond agent adds even more total strength between the 3 pieces combined.

[@KooroshNight]

1:15 yes its indestructible 😂

[@deathpanda1904]

I never had one but are they actually indestructible??

[@KooroshNight]

@deathpanda1904 me too but I think so

[@NewMr.Videogamer2024]

​@@deathpanda1904Obviamente si son destructibles pero son extremadamente resistentes los Nokia xd

[@yesseru]

I actually really liked the v1, the distortion makes it seem like some magical fantasy sword, i hope we get to see more of it!

[@EeveetoUmbreon25]

It would of cut better too with the geometric edge

[@Odyssey3D-Simon]

Awesome stuff. Trick as well. You can flame polish the edges to make them almost transparent after cutting. Also use resin instead of super glue to bond acrylic or get acrylic weld. Look at some aquarium videos to see how that works. It melts the two acrylic parts together rather than a glue. 👍

[@MikeShake]

Thanks for the info!

[@Odyssey3D-Simon]

Anytime! Keep up the good work!

[@Lizardman60]

​@@MikeShakeyou should make invisible baseball bat next

[@r4yv1]

@@Lizardman60 that wouldn't work

[@mercenarytao2524]

not sure about the flame. maybe if ur super careful bu last time i tried heat to smooth it out i overdid it and got bubbles in the material.

[@TheDaddy187]

so, coming from combat robots where polycarb is used a lot, i can tell you that cyanoacrylate makes polycarb brittle. it was the ca glue reacting with the polycarbonate that made it turn brittle. there is a chemical bonding agent made to glue polycarbonate, but isn't a glue, it effectively melts the 2 pieces together making it almost as strong as if it were 1 whole piece

[@Rjciralli]

This needs more likes

[@i-yy8lk]

@@Rjciralli yeh, why is everything so underrated

[@Useruserusername790]

So basically it makes a reaction that "plastic welds" itself, that's cool.

[@harrydavey9884]

​@@Useruserusername790 Yeah it's more common that you'd think. Solvent weld is very common in modern plumbing.

[@tawoorie]

^

[@breakingfoundations]

I tried this same thing when I was a kid with plexiglass. I still have it in case I ever try to finish it. I panicked at how scratched it was from making the edge, so I stopped. I'm glad i found this video! Maybe now I can fix mine. Though I usually sand everything by hand so hopeful it will still work.

[@joshuasalisbury789]

“Glass is glass and glass breaks” loving the Jerry rig reference

[@joshuamusser8893]

Yes

[@par6749]

Bro violated the pumpkin at 16:24

[@TroubleMitten]

glad i'm not the only one who noticed lol

[@LIL_flips]

Welp i can still see it

[@kosekpason2291]

Came looking for this comment

[@ArcLightShock37]

Polycarbonate is fascinating. Use it in our print shop from time to time to make signs. When discarding remnants from a job, usually narrow pieces that are four or eight feet long (as the sheets we get are 4'x8') it's very difficult to snap them into pieces so they'll fit into a container. However, if you put even just a very shallow scratch on the side that you're going to bend outward and then bend it will snap very easily. Very loudly and dramatically too.

[@ImSoldat1]

14:41 truly invisible 😂

[@AHMEDX8731]

😂😂😂😂😂

[@elherederodeminecraft3090]

😂😂😂😂😂

[@madux9467]

😂😂😂😂😂😂

[@wickrambug]

[@Ome-ga1]

😂😂😂😂😂😂

[@Packgodfan-x5y]

17:44 bro let da fly do him dirty 😭💀☠️

[@nussisultanamazumder]

1:14 fact that NOKIA is one of the indestructible items mentioned here....🤣🤣🤣

[@Jizen]

that caught me off guard

[@sadikmakwela1255]

It is true though. Those nokia phones can live through the worst of conditions and still work perfectly.

[@MinhHien091]

😂😂😂

[@nongoddd]

That was too funny dude😂

[@hugobajo2517]

Npc ass joke 😂😂😂😂😂

[@astolfo-official]

"Have you ever seen an invisible sword?" No sir, I have not.

[@hikaihikonoken9052]

At 3 likes, this is clearly an under-rated comment

[@abrobot9261]

@@hikaihikonoken9052 At 3 likes, this is clearly an under-rated reply

[@TheYeetedMeat]

⁠​⁠​⁠@@abrobot9261At 3 likes, this is clearly an under-rated reply

[@smiley_boiiiii]

@@TheYeetedMeat At 3 likes, this is clearly an under-rated reply

[@GreatDynamics]

At 3 likes, this is clearly an under-rated reply

[@pentasquare]

This is his weaponmasters arc. First he mastered the fight and now he is learning the forging.

[@cosobi]

watch him become zoro in a couple days

[@CatBoxOfficial]

The story of the strongest italian: the movie

[@bloodraege]

The italian samurai?

[@SkysHouseGaming]

@@CatBoxOfficialHe deserves one.

[@xyloiscool]

then the crafting (cooking ig)

[@X_Factorrrr]

9/10 if you can add any neon light or red light to the katana, its 10000/10

[@Alex_Afrasiabi]

You are living the dream of 12 year old me. Just as amazing as I thought it would be.

[@milkyycx1633]

I work with this material a lot, to get a perfect clear edge you need to get them flame polished. The difference between that and hand sanding is crazy. Only thing is it takes a specialist tool, using a flame from a lighter isn’t the same thing. Maybe this will help you for the future :)

[@Ethan54006]

dude i can just imagine an even clearer version, it would be crazy

[@yeetzabois3582]

yep

[@abdulshabanali7801]

Bruh like this so he can see it

[@MikeShake]

That's really interesting, should I sand before flame polishing or could I do that right after the belt grinder?

[@milkyycx1633]

@@MikeShake no need for sanding really, but perhaps sanding to assure you have a nice level edge before hand wouldn't be a bad thing :)

[@PianoMeetsMetal]

It definitely deals more blunt and internal damage than slicing damage. Really cool!

[@cafiristanemperor]

Wonderful video! Just imagine what you could do and the FORTUNE you'd make if you had a time machine and went back to any time where blades were essential for war. Imagine a medieval knight wearing invisible armour and weapons!

[@mariosebastiani3214]

Nice job! A couple advices: 1) when unsure about how a material will react to being worked on with a machine, try on a small disposable piece first. 2) when cutting the handle recess, drill holes first to avoid sharp corners, from which a crack could be generated.

[@TheAndreArtus]

Even steel swords have a radius (smooth transition) between the handle and the blade, sharp [interior] corners are always a weak point.

[@Ofhorse-yj1fc]

14:35 Katana becomes really invisible 😂

[@rickycool.]

😭😭

[@SkandarSmith]

It disappeared right before my eyes

[@ABYS5.]

100% transparent

[@DontEatLegoTV]

100%

[@choppaou7941]

You're a mean one, mr. Grinch

[@JustusScottJr]

@MikeShake I love this project and I'd like to help you make it better. I think that there are several areas of consideration for the next version and testing methods. I have not read all 6700+ comments, so please forgive me if I repeat any. I hope some of this helps. 1- The thickness of the "katana" and it's cutting edge -A katana is not meant to "cleave" through things. The curved shape of katana is meant to provide the smallest amount of cutting surface on the target. This increases the PSI of the cut. When you see a katana "chopping" through something, don't imagine an axe going through wood. Imagine the blade being dragged through the target and slicing deeper as the blade is pulled across the target's surface. More like a saw would work, slowly getting deeper by cutting along the surface, not going straight through. -A katana is thin so that (among other reasons) it can pass through the target with the least resistance. What you have created functions less like a katana and more like an axe, machete or kukri. However, if you decrease the blade's thickness, it will of course be weaker. -The edge angle is very wide, which is going to be more resilient to damage, but is not going to cut very well. That is why your cuts were messy. Of course, the narrower the edge, the more easily it will be damaged. -The problem you had with the blade being more visible with the shallower cutting angle would be lessened if the blade were thinner (as it would have less distance to travel from tip to flat) 2-Target materials -If you're trying to make an invisible katana, you would want to test it against objects that katanas are normally tested against. I have seen a katana cut a bullet, but if I remember correctly, the blade was badly damaged afterwords. The katana was ideally used to attack soft tissue and slice deeply enough with one cut to open an artery or reach vital organs. The easiest way to do this with a blade is to stab, which is why spears and arrows were more favored in large scale conflict and most blades (that I'm aware of) were meant to deal the finishing wound with a stab. There is a very interesting history about katanas and why they were shaped and used as they were. I highly reccoment learning about them if you want to take your project to the next level. 3-Swing technique and target fixation -When you're cutting with your blade I'm noticing that your swing is not at a comfortable level for you. I would reccomend lowering it so that you don't feel that you have to keep raising your shoulders at the last moment. Since training a correct sword swing is not neccesary for your project, I think it would be a waste of your time to learn swordsmanship. Of course, for your own fun and enrichment, I would say go for it LOL. But just for this project you could just work on a horizontal baseball swing or a vertical axe chop. The actual way to swing a katana takes a lot of work, and i think that your material would not do very well for the job (but I could be wrong). Once your swing is good, then I would focus on making sure that your target cant fall away so much. A lot of the energy of your swing is being dissapated by the movement of your target. 4-Safety -Even when you're cutting into soft targets, you can still have material failure. Since your sword is an unknown quantity I would highly reccomend that you at least wear safety glasses at all times. Since you're not a trained swordsman, you might also want to wear some wrist wraps so that any reverberation of energy back through the sword into your hands doesn't injure your wrists.

[@davidgoulding3276]

small point to add that I believe you missed(or i missed you saying), that the curve of the katana allows for easier edge alignment for a more straight on cut as the weight will carry to the back of the swing.

[@kastrodelacruz2721]

Wrote all that just to get two comments lol😊😂😊

[@Rorxw]

@@kastrodelacruz2721three replies now!

[@sniffingyourbuttcheeks]

u wasted ur time, bro is not gonna read all that

[@davidadegbola2671]

Bro... this is intelligently written 👏 I read through, and it's quite enlightening! Are you a swordsman? Or affiliated to any?

[@davidvega462]

2:19 army vet here. I was supply, and oh my good gravy, he ain’t kiddin. This stuff is expensive. I once signed off on a thousand pounds of it. The price tag was gigantic 🙃

[@samp1501]

Hey man, I saw a lot of comments saying that the cause of the snapped handle is because of the geometry which could be partially true, however the primary reason why this happened is because polycarbonate becomes brittle when it is exposed to superglue or loctite due to the active ingredient cyanoacrylate.

[@joshrepik]

I think it’s a combination of the two. The added rigidity from the super glue, and the perfect line of 90° angles at the stress point. The handle couldn’t flex, and where it couldn’t flex was a straight line where a light scoring would snap that poly

[@talonolson6050]

Adversely he should try shortening the blade so that it doesn't flex as much... that much flex in any kind of swinging bladed weapon is not what you want unless you're making a whip sword

[@Captain_Kobalt]

*"Glass is glass, and glass breaks."* that reference made me smile :) Edit: That phrase is commonly said by a tech channel, JerryRigEverything. High quality content, highly recommend it. (Just finish this video first, it's worth it 😙)

[@igorrauan9205]

where is from?

[@sethburnsman]

@@igorrauan9205 JerryRigEverything, great channel on KZbin.

[@awihuke]

@@igorrauan9205 @JerryRigEverything

[@digbic9937]

​@@igorrauan9205JerryRigsEverything...

[@chrisaitan]

@@igorrauan9205 JerryRigEverything

[@jackturner3803]

16:14 partially correct. The flexibility shouldn’t affect its ability to cut much, as steel swords also flex quite a lot. The thickness of the blade is part of the reason it doesn’t cut clean, but the main reason is the steep bevel. A bevel like that can’t get particularly sharp, and it’s a rough transition from the edge of the blade to the spine, massively reducing its cutting effectiveness

[@nialelkhatib4226]

It doesn't help that he's swinging the sword like a baseball bat

[@UmbraDiSol]

That's the other thing tbh, a curved sword shouldn't be swung like a base all bat as said above!

[@bored_deductionist]

And his technique and edge alignment

[@halfrave]

​@@bored_deductionist Edge alignment isn't even real.

[@MikeShake]

The reason I was swinging it like a bat, is because I knew it wouldn't cut like a real katana, so I probably had a better chance of destroying the targets that way. I'll improve V1 of the sword (thinner) and properly use it too!

[@mdjamir8653]

Technique is important. If you swung just right, it would go all the way through the watermelon and the face after the blade snapped is hilarious 😂

[@AwfulWeather5684]

Airport security isn’t gonna like this one..

[@ShortArtGuy]

Airport security isn’t gonna see this one..

[@Mahlak_Mriuani_Anatman]

Nice​@@ShortArtGuy

[@Fuck9oogleAskMe]

They won't see it coming 😏

[@karlharvey4806]

Wait a minute i thought I saw a sword in there, hmmmm never mind just my imagination

[@Sepoipaping]

“Did that man just stab a guy with air? He’s the last avatar!”

[@Edramon53]

I quite liked the distortion effect on the first version. Also, I think this would look fantastic with normal looking, visible katana handle (guard, wrap, etc) and just the transparent blade. Could even put some lights in the handle so it put on a funky and distracting show for your hypothetical enemies. Flicking between invisible, hyponotic and bright flashes on demand.

[@jakeforgey5378]

hide a string of blue leds along it and shout "Brisingr" before it lights up...

[@Zer-cv8ve]

Someone is a fan of cyberpunk 2077 I see

[@lemonlefleur6236]

Alright so hear me out: There is another Japanese Martial Arts style that would make better use of the material, both in regards to its transparency and ability to bend. I believe it’s called Owari Kan-Ryu, but I just call it the Wobbly Spear technique. In essence, you grab a spear near the bottom and with your lower hand push it back and forth (sliding it through your higher hands grip) so as to cause the tip of the spear to wobble in a circular pattern. It helps to get past guard stances, and would likely benefit greatly from having an invisible spear used.

[@garfd2]

Like Hyouga from Dr. Stone?

[@AmusedBigWaterfall-kh4vo]

Spear guy from Dr.stone

[@KorithStoneheart]

Even just an invisible spear blade

[@OnlySayori]

"what are you doing spinning that stick around"- the first victim of the invisible wobbly spear

[@lemonlefleur6236]

@@KorithStoneheart I don’t know if that would work as well. The blade would diffract light, which might not be a huge issue if the whole spear is invisible but would be if just the spear head was as you’d see the wood looking wonky through the spear head which would tip you off to its presence faster.

[@michaelulloa2179]

4:59 possibly the most satisfying thing I’ve witnessed today.

[@hodgepodge9362]

What I love about this is that this is just some dude figuring it out as he goes along. He's not some professional but he had a cool idea and he wanted to create it so he did.

[@BreadGood_21]

Fr bro that’s why I’m subbed

[@GeorgeLarryMIBU]

Welcome to Mike Shake

[@mandarinas364]

No te jode, no es un profesional, solo es un KZbinr con 4M de seguidores que puede hacer lo que le de la gana porque gana miles de euros con cada video... no se que valor le dais a eso

[@KakavashaForever]

The distortion effect was WAY cooler than just transparent! Wow that looked amazing! The sword ended up being more like a floppy long axe or something with that crazy shallow bevel.

[@SlerpyDerrpyBlue]

For every push up this like gets, I'll do one comment Whos watching this comment in 144p?

[@BenjaminClaretDeFleurieu]

Lol

[@Bread-qz3ht]

Anyone watching in 2024?

[@thomasjager-cash2859]

Ong

[@NightOwlYT.]

I’ll do 10 pushups and you have to write 10 more commments

[@Landrew-47]

@@Bread-qz3htbruh it was posted today

[@slimsali]

Who was flinching while he was testing it? 😅🙋🏽‍♀️ Also the smile of accomplishment everytime was golden 🙌🏽

[@amigoamigo9201]

8:30 I know that smile! My grandfather had a carpentry and I grow up playing in there. After school it was building time! Crossbows, soapbox karts, and any kind of toys and wood mechanisms... Unfortunately he is not here anymore, and all I have are memories from a time that passed too fast. That smile is everything, hold on to it brother!

[@TheVaibhav26]

uhh that wasn't why he smiled........

[@skiddly9235]

you know he was making a joke about.... semen? right?

[@bm_peep48]

Who’s gonna tell him?

[@rishiirich3838]

He was talking about pussy

[@MikeShake]

@TheVaibhav26 True for that specific occasion, but I smiled plenty of times for the love of what I was doing, so I totally appreciate this comment!

[@jayditya_d]

0:54 JerryRigEverything will be proud about the reference

[@parasdhillon3219]

I opened comment box , only to see Jerry’s reference comment

[@RXD_BB]

"When it's wet, it looks great" His expression 😭💀

[@ccflan]

dirty mind hahaha

[@Rentfreeparalysisdemon]

That part was hilarious. Tells you a lot about him 😂 he's great tho

[@1Archegos]

Naughee boi😏

[@darshansmash7278]

Katana is doing nothing but physics.. for sure.

[@JimmyChupa]

1:15 ‘and other indestructible items!’🤣🤣🤣 that phone really is indestructible though.

[@dygie]

Wanted to say the same thing😂

[@artishzone]

that's Nokia 3310 for ya

[@dygie]

@@artishzone Simply legendary

[@ShaneStephen-r6y]

Obviously, the new Nokia 16 pro max

[@----.__]

In laymen's terms; instead of the 90 degree angles where the blade meets the tang, you should have had a radius. By creating a sharp 90 degree corner you created a high stress point where all of the energy from the impact of blade is transferred to. Aircraft at one point had square windows because they're easier to make, but this saw stress fractures appearing in the fuselage. The reason aircraft these days have circular or oval windows is to negate high stress points.

[@Pegatayayo]

Hardness is not the same as tenacity, as a mechanical property. Policarbonate is not a hard material, so it is basically unable to actually retain the sharpness of the edge. That's why most of the test showed breaks by blunt weapon impacts, and not much of a cut. Still, it is a very cool weapon and admire your attitude of fucking around and finding out. Great video as always!

[@kyleshinabarger8343]

Just curious would he be able to coat that blade with something like Systemthree's T-88, or even cast one out of that and then use that? This when cured has a 7000 lb tensile strength, or do you think it would become too brittle?

[@Pegatayayo]

@@kyleshinabarger8343 that sounds interesting, but I don't really know about how well would that work in terms of resisting shock. It could very well be computer simulated before actually producing something like that. Brittleness is guaranteed with hard materials, but that only matters to the point of the shock you actually cause to the material (and the different forces that the blade suffers during a shock). I would say, it would work much better with a smaller blade size, maybe knife sized, which didn't have to work with so much weight on it.

[@your_mothef]

Found this guy on my fyp and now i cant stop watching cuz its funny and interesting

[@MagmaKami]

This new concept of videos is a great idea, you should continue to create weapons and test them out

[@4rdency]

He should totally start selling them on a very specific market of sorts to make more money to make more weapons 🤭

[@Ostr0]

​@@4rdencyI want an invisible katana for Non-Gun Defense

[@PresidentPlayback]

I’m not normally one to critique, but since you mentioned you weren’t familiar with bandsaws, I thought I might chime in. I noticed that at about 4:33 you made a small cut which allowed the piece to release, as the longer cut was already finished. It’s generally (when possible) best practice to make your longest cut last so that you’re backing out along the blade as little as possible. This lowers your chance of binding the band, which can injure you and damage your equipment and material. You can also make relief cuts into the middle of long spans, like along your (katana) blade, so that you can more easily adjust or take breaks. Hopefully this is helpful, and sorry for the long comment, especially if it’s not. Really good work and really cool video-thank you for making it!

[@davidshain2468]

Good call, I missed that part 😂

[@Sk1m_Beeble]

This is reasonable advice

[@ZaCloud-Animations___she-her]

That's not long, & is very good advice

[@Nømad-iv9]

As a blacksmith myself I know the pain of having your creations break but you did learn something from it so amen

[@Yorubabwoi]

The UK is gonna have a field day with this one

[@Darkoo1111]

Another reason of why the sword was fragile at the handle is because of the sudden change of shape from handle to blade : This is called stress concentration, and it occurs where there is a sudden change in geometry or dimensions of a material, which causes an increased concentration of stress in that specific area Additionnaly, one of the reasons of why it did a poor cut on a watermelon could be due to technique, and the thickness of the blade. Swords are purposefully flexible, maybe not as much as yours but this is in order for steel to be able to go back to its original shape, and not just bend when an amount of force is applied. Maybe you can try but cutting and not swinging it like a bat, for exemple when you cut vegetables with a knife, you don't just chop it, but you also do a slicing motion, though this is an idea as I have no experience in using a sword, and only know the very small basics of material resistance, and I hope it helps !

[@G33K01345]

The sledgehammer test breaking the sawhorses was unintentionally so funny. You praised the polycarb for how little damage it took when the sawhorses took almost all of the impact (evidence - they broke). The base has to be stable and in-compressible otherwise you're just passing the force through to the object at the end of the chain. If you're going to use wood at least make them stumps. Also for the bandsaw, you should extend the base to support the weight of the thing you're cutting as the bouncing changes the angle the saw meets your piece.

[@petermgruhn]

Nothing is incompressible.

[@mrkiky]

You're not passing any force to the end of the chain. All of the objects in the chain feel the force, minus anything that was absorbed and converted into something else by all of the objects before it. So the polycarbonate felt more force than the sawhorses.

[@Em_prer]

have you ever "SEEN" an "INVISIBLE" 🗿

[@G33K01345]

@@petermgruhn 'Incompressible given the forces present.' You're welcome, Captain Pedantic.

[@G33K01345]

​@@mrkiky The further down the chain you go in this case, the more force that is imparted. The sawhorses bent and broke under the all of the force that was transferred through the polycarb, except for the energy removed from bending and displacing (plus heat, minor scratching, sound, etc). Try this again but using stumps or rock as your base and you'll see the difference. There will be more bending, potentially shattering as seen in the handle due to flex angles, the sledge hammer will be pushed back with far more force, etc. This is basic high school physics. It's why you want your car to crumple in a crash, to absorb the force that would otherwise go through your body. The sawhorses were the crumple zone, and airbags.

[@Chunkymango99-oj3mq]

i love how whenever something bad happens he keeps it and makes it work

[@Yora21]

Pumpkin can be super hard. At one of the places I worked as a gardener, we did have a field where we grew pumpkins. When it came time to harvest them, you could sometimes find small pumpkins that had been run over by the tractor and pushed into the ground breaking.

[@NevTheDeranged]

This version is more of a sharp club than a sword, it didn't so much slice or cut as dent and smash, and shortening it actually did you some favors in terms of being able to maintain edge alignment. I'm really glad you dulled the handle before trying the harder objects! It's still a devastating weapon, capable of shattering bone and crushing muscle tissue and cartilage into useless pulp. Honestly just as terrifying as a clean cut in its own way. Bottom line, It's sick af. I definitely think you should finish v1 and make it ultrasharp- a translucent sword is still dope!

[@GPS08]

Sharp club, you mean an Axe?

[@NevTheDeranged]

@@GPS08 Haha, yeah, basically. Although I think an axe would still be sharper than this was.

[@st.altair4936]

The first one was way cooler honestly. It'd probably cut far better too; this one was more like smashing objects.

[@vedant_stone]

At this point, I just love to see the guy happy. The guy is so happy while making this sword lol. I love to see that wide ear to ear smile by doing something silly(as others would call it, but not me).

[@sigmaprojects]

This is awesome. Another possible reason for the blade to crack at that spot is because of sharp angles promoting crack propagation. It's quite interesting, you can read up on fracture mechanics. Without going into too much basically when there's a form that might promote a crack it can then propagate and cause a part to break even though it looks like it shouldn't and sometimes even removing material to reduce the point where a crack could form causes the part to be stronger.

[@treyposey8507]

17:43 I thought that the bee was real lol

[@slowspeedreal649]

me too

[@calixtosaid975]

It was a fly

[@-BenjiVr-Gtag]

Omg I jumped bro

[@hanshans387]

I think the handle issue might be the sharp corner. don't forget stress raisers! a smooth curve to reduce the width to the handle size is better than a sharp internal corner!

[@nw4042]

Yes, indeed. We call them stress concentrations, but yes.

[@notalecguinness3221]

1:15 "and other indestructible items" - lol, I absolutely lost it :D

[@SeanFerree]

Same 😆😆😆

[@R4ndomUser567]

Me too lol

[@humanchannel9421]

No you didn't

[@R4ndomUser567]

@@humanchannel9421 what

[@NVDGaming_9125]

This phone is legend and I still have it

[@MarkGuipe]

Bro created a masterpiece 🤯

[@vladimirputin3426]

another big part of why the blade snapped at the hilt isn't just about the quality of the blade, but rather your edge alignment on the hit. The katana hit the pineapple with it's edge facing upwards, which effectively moved the middle of the blade up and away from it's inertia, turning your horizontal cutting force partially into a vertical snapping force. I reckon the blade would've survived with better edge alignment, and that can be aided with better handle design to make your natural grip closer to keeping the edge straight and practice in cutting smaller targets that won't be solid enough to break the sword.

[@Malva597]

"Cool sword." *Snaps in half.* "Oh, stress risers, riiight."

[@TheNewLooter]

"That thing was too big to be called a sword. Too big, too thick, too transparent, and too plasticky, it was more like a large hunk of polycarbonate."

[@nicholaswhorley8343]

Chapter 376 coming soon!

[@tophateyeball7198]

Damn, I wanted to post pretty much this comment, haha...

[@MeredithLikely]

@@tophateyeball7198 hard same glad another berker got here first

[@xXCharixmaXx]

In that case, a regular sword is just a hunk of metal.

[@Kuyadevo]

Wait i know this manwha but i forget the title please help

[@laghingcast]

First time ever watching one of this guy's vids-- already subbed. It's a perfect mix of awesome/fascinating/nerdy and funny. I am so glad to have found this lol

[@Falling-kirby-memes]

Why am i the only talking about Mike's jerry quote (Glass is glass and glass breaks) Jerry rig everything

[@pororoo777]

Honestly, I love the first version you made. It is not too transparent, but it will be sharper than the second one. Anyway, such a good job to make those katana

[@Princelox-rob]

man his smile on the blade when he is doing it just makes me happier makes my day man…. Alot of people don’t know the power of smiles

[@littlemuffin943]

you have a great proof of concept i would talk with some bladesmiths and see what can be inproved and changed

[@FormigaFit]

I used to binge your videos. I'm glad you did this video. Its classic KZbin without obnoxious music and ads very easy to watch and entertaining. Keep up the great work, Mike.

[@lhorlogiste6119]

I love this classic style too

[@ragael1684]

Guys im gaining a bit of weight, so I'll do this thing. For every like I'll do 2 push ups, I'll try my best.

[@SpeedyWillDrawing]

Your first push up starts now

[@ragael1684]

@@SpeedyWillDrawing aight, bet.

[@PleasantSolitude]

I know you were going for an invisible blade, but I can't stop imagining how beautiful it would look with a powerful LED through the grip at night. This might unintentionally be a badass Cyberpunk katana, as well.

[@sejwok2628]

This got me thinking about what kind of blade would be ideal for this material. Something shorter, with less of a bevel and more mass to make up for it. I think this stuff would make a great invisble machete

[@Mario-ur8fg]

It would be super cool to invite a professional in this katana thing! I don't doubt your cutting skills but it's curious if a professional with this type of katana can achieve something different! 🔥

[@sorewahimitsudesu]

I think we have to go on a quest to recruit bbillyk for our party.

[@MetalheadAndNerd]

He should invite a real manga character used to wield giant swords?

[@Mario-ur8fg]

@@MetalheadAndNerd yep

[@user-ek5fp6zw2n]

Will it keeel ?

[@Keon-lx3ui]

😂😂😂😂😂😂

[@HazyTheEntity]

THERE IT IS! I was looking for the reference lmao

[@DJzizou7125]

It will not keal 15:24

[@deonclayton1099]

😂😂😂

[@faithite]

And it will kat.

[@REDD-EE]

The cutting edge makes it look even more beautiful. Nice work.

[@joshcruz9794]

Damn, I know the sauce of your pfp kekw. Dendenden bu

[@REDD-EE]

@@joshcruz9794 i did not know this was a hentai...

[@joshcruz9794]

@@REDD-EE well dude, I got news for ya. That's hentai and a good vanilla one.

[@SeanFerree]

Well said!

[@burgerbro4927]

1:20 that one homie at the sleep over

[@hamzatalaat8784]

Once he showed the nokia we already knew we're in business 😂

[@voltagemike4457]

YUP LMAO

[@Baccha16]

14:35 was so funny

[@somaligamerfreefire]

😂😂😂

[@L_Ratio_01]

I also wanted to see the testing of 1st prototype, as that was much sharper. Maybe not test it as an invisible sword, only as a transparent sharp sword that looks cool. Edit: maybe you can setup a coloured light below the handle, and due to its thin angle, it will show internal reflections and the sword would glow.

[@adikaadda1777]

It's a sword perfect for John Cena.

[@SamuraiGod_SecretBlade]

Your not lying though

[@JeffreyRitter-gr7zs]

I'm not seeing it tho. 😂😂😂😊😊

[@Jenna-hu7mp]

13:48 I do believe that is a Butternut Squash, not a pumpkin xD

[@xarin42]

Corroborating this statement.

[@Jinxsyns]

Just gotta say I really love that you're being transparent about how you've not done certain things in this video before! Too many people are so afraid to start things or try things they don't know, and I think more people need to show that part of the process if possible! Sure, nervousness is normal but uust be careful and start slow haha

[@hovesssharedspace8490]

ha, transparent

[@Potato_king70]

8:35 banned from KZbin

[@Wolfubs]

????

[@therealultrag]

Real

[@Skyhigh092]

When it's wet , it looks greaat 😂

[@eminaga7]

🤣🤣🤣

[@Noah26-d2w]

Pusy😅

[@VFXALGHO]

Mark rober + him + Alex lab 😂 the great empire of destruction things

[@cringusmoss9937]

Skallagrim had a video not long ago about what duelling weapons would look like in the modern age. This is the kind of thing i imagine people carrying.

[@chuckschillingvideos]

Yes, if you want to make an edged instrument with this that retains some semblance of transparency, you're going to need a much thinner stock in order to achieve a more useful edge profile. What you made is essentially a sword with the edge profile of an axe.

[@devinjanosov]

The fact you did this, this well, with almost NO EXPERIENCE using the tools, or materials, is so impressive, you should probably be running a construction company.

[@desmondschneider5397]

8:25 I imagine you said, “When it’s whet, it looks great,” since it would reference how a whetstone sharpens a blade. The demonetized icon was also funny, lol

[@EPICJESTERJEVIL]

He's running at me completely unarmed, what does he think he's doing?

[@d1nodray]

lol

[@thatorammutla3583]

underrated comment 😭

[@spennerFX]

As someone who machines polycarb day in and out, even 90 degree edges are sharp enough to use as a chiesel. I recommend using a router and beveling bit for profiling the blade edge instead, would be very quick.

[@brolysadvocate]

right, zero experience over here, but I was thinking how a CNC machine would've made this a breeze lol.

[@watermelon5521]

This sounds like something hacksmith would make, using high pressure fluid or air as the blade.

[@bembjaminbrosenglek1163]

Good job, you entertained me and also made me want to eat some butternut squash