Making the Longest Lego Cardan Shaft

Рет қаралды 3,571,685

Күн бұрын

Building and testing universal joints and cardan shafts with Lego Technic.
Chapters:
00:00 Universal Joint
01:55 Cardan Shaft Offset
03:50 Cardan Shaft No Offset
06:27 Car
BuWizz 2.0 Bluetooth controlled rechargeable battery box - buwizz.com/shop/1-buwizz?ref=155
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Camera used for this video: amzn.to/3Hxisci
Microphones used for this video: amzn.to/3HpIxdY
Please note: I get a commission if you buy via Amazon or Buwizz link above. Thanks for your support.
Where I get my parts: www.bricklink.com/v2/main.page
#bricktechnology
#legotechnic
#lego
#asmr
#universaljoint
#buwizz
#engineering
#cardanshaft
#experiment

Пікірлер: 1 300

@BrickTechnology 2 жыл бұрын

Check out my newest video: kzfaq.info/get/bejne/lZ2nqs1qrsW1p2w.html

@TheRaineWitch 8 ай бұрын

The fact that you go back and edit them all 😂 mad respect

@MrLevtastic 2 жыл бұрын

Using a guitar pick to illustrate the turning speed fluctuations for people on smaller screens or if the camera didn't pick it up was a *really* clever way to do it - very cool!

@doursen 2 жыл бұрын

I couls see it just fine on my phone, but the sound somewhat helps

@DasSparschwein 2 жыл бұрын

I think that something similar was also used in an old kardan shaft explanation video by ford or some other car brand in the 50s.

@joratto2833 2 жыл бұрын

@@DasSparschwein I remember the same video. It’s a timeless method.

@AdamHowellProvo 2 жыл бұрын

I wish he had contrasted that with a CV joint.

@bando404 2 жыл бұрын

Is that really a guitar pick? It’s huge…

@kasuraga 2 жыл бұрын

This is a great example of why it's important to phase your universal joints properly in all use cases.

@villageblunder4787 2 жыл бұрын

Or use CV joints!

@SolarWebsite 2 жыл бұрын

@@villageblunder4787 Yeah exactly! Because your output shaft may me nice and stable, but the intermediate axle not being at a stable speed will be noticable at higher masses/higher rpms.

@bonovoxel7527 2 жыл бұрын

Oh thank you, now I know what to search the internet for in order to understand what's the point of this video.

@UNSCPILOT 2 жыл бұрын

I didn't even know this is a problem but will deffinitly keep it in mind if I ever need them for a design

@kasuraga 2 жыл бұрын

@@villageblunder4787 Lmao of course, or use cv joints. CV joints are definitely better but in situations where only UV joints are gonna be used, definitely phase them properly or you're gonna have a bad time

@epiccollision 2 жыл бұрын

Thank you for perfectly illustrating how small losses in a mechanical chain can add up and cause failures.

@tomkampfraath 2 жыл бұрын

5:00 The electromotor:”THAT’S ENOUGH SLICES!!”

@GunGryphon 2 жыл бұрын

Watching the motor slowly die as there were more and more sections added was heartbreaking.

@jameschamberlin3926 2 жыл бұрын

Yeah

@bdscooting5312 2 жыл бұрын

Ye haha

@liamernst9626 2 жыл бұрын

And motorbreaking

@BrokenCurtain 2 жыл бұрын

This channel should be renamed to "brick torture".

@flxz77 2 жыл бұрын

It felt like everything was going to explode at any moment

@alexludwig9099 2 жыл бұрын

The issue with your "no offset" design is that there is still an offset, its just a very minor one. Because its spiraling outward, the angle of change is not exactly 90 degrees, but slightly larger. Over 60 iterations, that small angle has added up to a large offset.

@kauhanen44 2 жыл бұрын

wouldn't it still be the same angle since they are concentric (almost) regular hexagons? it's just slack in the joint that's accumulating and causing the intermittent rotation.

@KimmyR3 2 жыл бұрын

@@kauhanen44 nope, and it's not actually the offset that's causing the 'fluctuations' but the angle of the joint. the greater the angle, the greater the effect. in the real world, a CVD (constant velocity drives) solves this by a number of ways.. one of which is by introducing another universal joint in the same space. in the lego example above, it's basically 2 (or more) universal joints every time a "turn" happens..

@StefanNoack 2 жыл бұрын

No. You can see them move all in perfect sync. However friction is fluctuating and therefore the motor speed does not remain constant.

@ThePapino134 2 жыл бұрын

also all the inks seem to be in the same state. every rod should be ofset from the precedent to mitigate the torque problem on the angle offset

@allenlark 2 жыл бұрын

you could maintain theoretically perfect 45°/135° angles and still spiral out just by changing side/shaft length. so this isn't necessarily the reason

@Marisad 2 жыл бұрын

8:52 We will miss him. He was a great man and a good friend. Rest in Peace

@user-rx7og5on6y 2 жыл бұрын

For the students of vehicle engineering, the unequal velocity universal joint is really kind

@tacomas9602 2 жыл бұрын

Universal joints are something you have to watch on farm equipment a lot. Also driveshafts and such!

@JayRussellDuramax 2 жыл бұрын

I'm not sure what I enjoyed more, the demonstration, or all of the hilarious ways the motors, gears, and other bricks popped apart under the stress! Haha! Also, once you got to 18 U-Joints on the car, the drivetrain sounded like the beat to a Johnny Cash song. Hahaha!

@jlinkous05 2 жыл бұрын

Unreleased Cash track: I Walk The Line of Offset Universal Joints

@JayRussellDuramax 2 жыл бұрын

@@jlinkous05 I could see Weird Al Yankovic doing something with that... Haha!

@basilbrush9075 Жыл бұрын

Yee haw, like a gallopin stahlyun

@aaronfoster5680 Жыл бұрын

And it only took One Piece at a Time!

@kummer45 2 жыл бұрын

I can't explain how awesome this video is. It's literally an engineering class gone right. This is the best way to learn something complicated having fun with it without spending lots of money.

@anongentry2269 Жыл бұрын

Total Mech noob here, is there a real-world purpose of this level of iteration with a Cardan Shaft, or is this just a way to demonstrate the cascading increase in offset?

@zimidiaz1015 Жыл бұрын

@@anongentry2269 mech noob here too, but I dont think there is any feasable real world purpose of this level of iteration of universal joints, one or two at a time, maybe, even three, or four if you really want to stretch it, I can see, but 60? thats just ridiculous

@Kolonol1 Жыл бұрын

@@anongentry2269 you've never driven a 4 wheel drive vehicle with completely independent suspension all the way around? Maybe a Mercedes? Or a dune buggy? They all have some/ a lot of these concepts

@kayciestraub 2 жыл бұрын

7:16 *insert train horn here*

@alexlik4197 2 жыл бұрын

Wow! I had no idea that the offset thing was even a thing! I learned something new today. Thanks!

@gameknight.thump1 2 жыл бұрын

i cant even tell whats different between the offset and the not-offset XD nvm i just didnt notice it at first bc me dum btw we have the same first name :o

@minidude993 Жыл бұрын

@@gameknight.thump1 I literally took 15 min trying to figure it out. Had to take screenshot to go back and forth and everything lol all makes sense now though

@jaredchampagne2752 Жыл бұрын

@@minidude993 can you explain it to me? I still don’t get it, the design looks the same. Offset and no offset...I feel so dumb.

@nkt1 Жыл бұрын

@@jaredchampagne2752 Look at the middle shaft @1:11. With no offset, the C shapes on each end are both aligned.

@olafhoftijzer9571 7 ай бұрын

What is it used for tho?

@TERRORdrigo 2 жыл бұрын

the sudden gear grinding at 5:40 kills me. it also sounds like a gau 8

@stopmotionanimations1 2 жыл бұрын

That moment was like a jump scare for me, especially since I had my volume on almost max with headphones on.

@natan6218 2 жыл бұрын

or sudden, explosive diarrhea

@CocoNoCo Жыл бұрын

Sounds like a strong, crispy fart.

@Dinginkan Жыл бұрын

@@CocoNoCo ur dad fart

@yerpy-nya-furry 11 ай бұрын

@@CocoNoCo exectly

@malinhiles 2 жыл бұрын

I seriously appreciate how you kept the raw audio. You actually see and hear everything as it happens, no janky ass music covering everything up lol. Great vid!

@sliceofbread2611 2 жыл бұрын

at 4:30 you made a very trippy optical illusion, it looks like the joints are moving outwards

@MixZTitaniumDubstep 2 жыл бұрын

5:41 that abrupt grinding noise i think is funny.

@rs37_ 2 жыл бұрын

I loved the short stop motion animation at the end, great detail.

@nonpondo_ Жыл бұрын

It scared the hell out of me

@RailsofForney 2 жыл бұрын

8:21 GUY: M o v e . MOTOR: But I don’t wanna! GUY: M O V E MOTOR: O-K! *MOTOR GOES SPEEEN*

@allhonesty848 2 жыл бұрын

When I went to automotive mechanic school, they used a lego model similar to this to demonstrate automotive drive shafts and problems that arise with them.

@Jayderzomb 2 жыл бұрын

I‘m very into mechanical engineering, and i like to think that i know much about it but this is new to me somehow i never thought about this, thanks for spreading information mate!

@EstorilEm 2 жыл бұрын

Same! Still scratching my head and simultaneously feeling kinda stupid for not realizing this.

@datawsomeduck3383 2 жыл бұрын

I like how whenever it broke it went from sounding like a engine with no fuel to a full rpm v12

@half_time Жыл бұрын

Wicked effect. Looks like the whole octagon is growing in size because of the spin. Love the illusions. 3:55

@toothlessblue 2 жыл бұрын

4:15 wild optical illusion where if you stare in the centre it looks like it's getting bigger - besides him adding more connectors ;D

@al-asadi 2 жыл бұрын

That optical illusion @ 3:50 is amazing!

@nagualdesign 2 жыл бұрын

What optical illusion?

@Gwalchgwyn 2 жыл бұрын

Oh, wow. Did not notice until I stared at the centre of the image for a few moments. Cool.

@allergictoasphalt11 2 жыл бұрын

Oh yeah it is!

@Gman556 2 жыл бұрын

@@nagualdesign When the axles are spinning it looks like the whole structure is slowly expanding outwards

@nagualdesign 2 жыл бұрын

@@Gman556 I don't see that myself but thanks for explaining.

@helpmereach45ksubswithoutvideo 2 жыл бұрын

These videos makes our days better

@STA-3 2 жыл бұрын

No, i won't help you reach 31k subs without any videos.

@crazygt850 2 жыл бұрын

@@STA-3 savage

@arnoldrimmer9161 2 жыл бұрын

I would most certainly agree with you on that!

@mansikkamies9146 2 жыл бұрын

Bot

@florisjaaltink3455 2 жыл бұрын

This is brilliant, I've been working on a project using these joints and so far this is the best example of how they behave!

@CharliesName 2 жыл бұрын

I always think to myself when I watch these videos. "Surley this is close to the limit". Then I look at the timebar and it's always less then 50% of the video. You really push these lego experiments to the limit and it's awesome!

@jibs2861 2 жыл бұрын

3:58 Now I know how to make the chromatic scale with Legos!

@dorabora2936 Жыл бұрын

Honestly this is a brilliant demonstration for how universal joints work, I’m actually studying as an engineer (focused on cars, particularly in Motorsport) and we had this explained in class but even with the animations they had I struggled to intuitively understand how exactly the fluctuations work. This demonstration finally made it click, so thank you for this excellent video!

@conkerthesquirrel4331 2 жыл бұрын

KZfaq algorithm has never done me wrong. Happy to have found your channel! These demonstrations have so many applications outside of Legos. They get my brain thinking differently about common problems I run into at work/home/other projects. Great stuff!

@BloodyMobile 2 жыл бұрын

I'm always impressed with the unexpected failure points. Also with how some of these setups sound like low rpm diesel engines.

@Metalwrath2 2 жыл бұрын

5:11 warthog fires its guns

@Bear551590 2 жыл бұрын

So much respect for the time and effort that went into frame matching the transitions at the 4:40 mark.

@ArdePiertje 2 жыл бұрын

Nobody cares tho the video is still lit

@jo-gu4ln 2 жыл бұрын

@@ArdePiertje i cared

@STA-3 2 жыл бұрын

@@ArdePiertje i cared

@TrueWolves Жыл бұрын

@@ArdePiertje I cared.

@RepressedButton Жыл бұрын

I cared

@GilliamFlebus Жыл бұрын

It's really cool how you kept matching the motor rythme while adding more joints. Such a subtle detail that seems completely effortless but isn't.

@plymouthmechanic3423 2 жыл бұрын

Very pleasing to see how much torque you can achieve with Lego! Every time you thought to solve the weak spot, the following weak spot appears. Very nice video!

@nickmaclachlan5178 2 жыл бұрын

I'd have been interested to see if some lubrication would have made it any easier to run those 66 U/J's? This experiment also perfectly displays the reason why cars need to have constant velocity joints in their axles and driveshafts. Can you imagine having to drive down the road with your wheel speed fluctuating like that? Lol.

@N-Kryptic 2 жыл бұрын

Its called driving a Jeep lmao

@scopie49 2 жыл бұрын

Lubrication would definitely help. Brick Experiment Channel has occasionally added lube to some mechanical tests and it increases the RPM and helps preventing overheating/melting of the plastic parts. Some would considering adding lube cheating though since it's involves using something outside the world of Lego itself. I'd still be curious how far it could go because there is a lot of sources of friction adding up throughout this model.

@tenorHarlequin Жыл бұрын

I love that you show the issues in your device iterations. It's really healthy for upcoming engineers and programmers.

@STMNewEngland Жыл бұрын

that was hypnotic. also this has to be the best demonstration of both mechanical loss and U-joint phasing. i would love to see one with Constant velocity joints.

@randomgamer4048 Жыл бұрын

8:30 I swear this is the noise printers make

@Legominder 2 жыл бұрын

Nice! I knew of this effect but making a chain reaction of the oscillation through the axle is great!

@cartsoel9652 2 жыл бұрын

It’s cool how the sound changes every time he adds something. I enjoyed observing the whole process.

@SeLLeks 2 жыл бұрын

There is a really fascinating visual illusion effect if you watch the middle of the building and move your eyes around the joints. Looks like it all expands outwards.

@Only_Henrik 2 жыл бұрын

Wow great ways to demonstrate the importance of no offset! also very mesmerizing!

@JayAlastor Жыл бұрын

7:05 sooo my mind was working right when i was thinking "HEY isnt this used for differentials in cars??"

@FNBonkers 2 жыл бұрын

Nice vid, it demonstrates the oscillating motion of the shaft when you have a difference in angle from one end to another, and of course the huge loads on the bearings. that's why you can't change the drive angle with a traditional cardan shaft, just a parallel offset.

@BigPanda096 2 жыл бұрын

No obnoxious music, just the beautiful sound if Legos and Lego motors operating and being put together. I could just listen to this to fall asleep without even watching it. Idk why. Thank you for not.bombing the videos with some obnoxious music. Idk why people think you habe to employ the use of wild sounds and lights to keep attention. If your content is worth paying attention to, then I will. If you have to use sensory overload just to maintain attention, then you aren't making good content. This, this is GREAT content that is self attention grabbing. Kudos and very well done.

@builder1013 2 жыл бұрын

4:55 My computer when I put shaders on my Minecraft world

@danielfruhauf5304 2 жыл бұрын

Didn't expect a video so soon. Very cool!

@bobkaster1 2 жыл бұрын

I am so glad I watched this. I've been seeing the same fluctuation in my 42055 Bucket Wheel, now I want to go back and look at the U-Joints in the power system and see just how I have them positioned.

@danieldey 2 жыл бұрын

I never knew about fluctuations like this, and the guitar pick use was awesome!

@poobutington207 2 жыл бұрын

Litterally rhe best type of videos, jus straight content, no commentary, no music. love it man!

@shangerdanger 2 жыл бұрын

There was a technic piece from the 90s that was a U joint inline with axle

@olafhoftijzer9571 7 ай бұрын

Shanger!

@aaronandannelogan Жыл бұрын

Clearest explantation I've ever seen (literally!) of why a universal joint is not a constant velocity joint. Subscribed.

@thehannomeiring 2 жыл бұрын

I love how you show the mistakes and failures, this is super awesome, learning alot

@eyeseaewe1736 2 жыл бұрын

Great video as usual. I never knew the phasing of universal joints could have such an effect.

@chessie2003 2 жыл бұрын

The use of a pick to demonstrate rotation speeds is inspired!

@thetubeboi6991 2 жыл бұрын

He didn’t say it wasn’t.

@jacknesbitt240 2 жыл бұрын

@@thetubeboi6991 inspired is another word for very smart/creative

@thetubeboi6991 2 жыл бұрын

@@jacknesbitt240 kk, sorry.

@kevinsmith3854 2 жыл бұрын

I appreciate all the editing with this build.

@nkronert 2 жыл бұрын

I love the construction "time lapse" edits. Lots of work, but great results!

@koejoe 2 жыл бұрын

I’m always amazed by how much I learn on this channel.

@riclozano 2 жыл бұрын

wait... I wasnt the only one to think that this sounded like old town road right????? 6:27

@BARUtubbig Жыл бұрын

7:42 love how you can see the rotation move through the loop

@davesendit1348 2 жыл бұрын

Very good video. Very interesting. I have a good idea for the next video for you. What if you made a lego lathe? Maybe it could cut styrofoam or maybe even wood. It would be really neat if it had power feed and everything

@jeradblazek677 2 жыл бұрын

Man, Lego's have definitely gone from just being a child's toy, to a tool for aspiring engineers since I was a kid!!

@sirrichardpumpaloaf8154 Жыл бұрын

It’s LEGO, no such thing as LEGO’S

@jeradblazek677 Жыл бұрын

@@sirrichardpumpaloaf8154 Lego my eggo😉

@cyootlabs 2 жыл бұрын

Now that I've been staring at the two frames between the cut where the changes are shown for three whole minutes and finally figured out what "offset" meant, seems simple and it makes sense.

@thomasgougeon9804 Жыл бұрын

That poor motor is like: I canne do it Cap'n!! I don have the power!!! This was super fascinating and the guitar picks to show the offset was a great idea!

@Calthecool 2 жыл бұрын

Imagine a GBC module that moves the balls to the center using a mechanism like this.

@AngelloProduct 2 жыл бұрын

A weapon to Surpass metal gear 8:44

@MM. 2 жыл бұрын

Fascinating. It's interesting how your test is like a ring-shaped conveyor that would transport objects from all directions to its center. I wonder if something like this exists, although I can imagine that in most instances, you'd simply use a funnel and let gravity do the work.

@El-Burrito 2 жыл бұрын

I love it when the whole thing pulls itself apart. Such a cool video!

@_g7085 2 жыл бұрын

I went back, and forth, back and forth. Many times. I never saw a visual difference between "offset" and "no offset". What did I miss????

@_g7085 2 жыл бұрын

@@tusharxo ahhhhhh, now I see it. I was looking for a piece added or removed, or perhaps a different piece. Rather than the two ends of the middle shaft being parallel, they're perpendicular now. Thanks!

@jasperfk 2 жыл бұрын

@@_g7085 That really helped, thank you!

@in1 2 жыл бұрын

As always, another great video! Did you consider a worm gear at the motor?

@BrickTechnology 2 жыл бұрын

Thank you, the gear does not matter at some point, the bottleneck are the first 1-4 joints, they give

@theyeetus1428 2 жыл бұрын

Exactly what I thought.

@DantalionNL1 2 жыл бұрын

@@BrickTechnology Could it be better if there would be lube added to the shafts? Almost looks like a friction issue.

@DuckInGameStop Жыл бұрын

5:10 "oh cool they changed the gear ratio, it'll probably run smoother now" *grinding noise directly from hell*

@awesomethang1328 Жыл бұрын

very cool optical illusion for the second type of joint when it was spinning really clean, looked like it was growing

@mystic7462 2 жыл бұрын

Alternate Title: Destroying More Lego Using More Lego

@xitcix8360 2 жыл бұрын

Those lego pieces went through a lot of pressure, I'm surprised none of them broke

@kentslocum 2 жыл бұрын

I learned a lot about universal joints--thank you!

@ScrewySquid 2 жыл бұрын

When you were doing the no offset the test it started to look like a optical illusion, kinda reminded me of the hypnotoad from futurama

@swedish_shitpost7756 2 жыл бұрын

4:20 why does it look like its getting bigger?

@drubradley8821 2 жыл бұрын

I am glad you dialed in your PHASING of the U-JOINTS... my OCD was going nuts before on the older videos...LOL... Well done. I enjoyed this video as well..

@phystem1 2 жыл бұрын

I have no clue on how machines work, neither have an idea on mechanical engineering. But still I find this video fascinating. What I got from the video is, you need to configure things in a certain way to increase efficiency

@D37o787 2 жыл бұрын

your channel is a fantastic example of what can happen if things are not fixed correctly. reaction forces create a mess

@reggieflo 2 жыл бұрын

Using that guitar pick? genius. That slow motion at 4:06 is a subtle, yet well deserved flex. What a dope video

@GuildOfCalamity 2 жыл бұрын

This might be my new favorite channel. I had the original yellow MIT Mindstorms brick with the black top and buttons... I'm sure they're very different today, that was 1998.

@EFCLARK 2 жыл бұрын

Whyyyy was this interesting as hell??? And the Lego man 4th wall break look at the end was a " HA!" moment. Well done

@eljoh97 Жыл бұрын

the sounds and visuals in this video were mesmerizing

@SimonLaudati Жыл бұрын

The initial offset explanation is exactly the reason for the cracking noises of the Technic Defender

@fen4554 2 жыл бұрын

5:57 I had a physical reaction to this

@javierduhart336 Жыл бұрын

I made many mechanisms with LEGO gears during my youth and never encountered the offset issue using multiple universal joints. Didn’t know it existed until now!

@xhag1x 2 жыл бұрын

Clearly the smoothest ride ever built for comfort

@LittleSweed 2 жыл бұрын

This gave me answer to a question I have had but never really bothered about to ask why you shouldn't have the joint on your car offset I'm sure it has less meaning on a real car then on a Lego but still interesting.

@NicoSmets 2 жыл бұрын

I appreciate the efforts going into making a video like this.

@m143l 2 жыл бұрын

Like the rhythm you used for laying the bricks. Making music with that

@sleepydragonzarinthal3533 2 жыл бұрын

that was way too fun, plus when the video goes slow motion, you can slow it down more on youtube for extra informative observation haha and while we applaud the dedication in this video can we also take a moment to respect how much torque legos can withstand? pretty impressive, and thank god no obnoxious background music!

@ihavetwofaces Жыл бұрын

6:15 - father please, I cannot! You ask too much of me!

@hugosantos1476 2 жыл бұрын

LEGO's have evolved a lot since I was a kid and all I could do was dream about having the Technics sets I would see on magazines.

@MrFurbulous Жыл бұрын

5:42 that went from 0-100% violently! Also I jumped me a bit and made laugh hard.

@The_Mimewar 2 жыл бұрын

The guitar pick. Brilliant!

@Dysan72 2 жыл бұрын

The one thing I'm wondering in then No-offset version is if you should have had and off-set between the U-joints on either side of the supports. It has to push the u-joint harder as it angled axis speeds up slightly. With all the u-joints in phase all the angled axles are trying to speed up at the same time. Which is why the motor struggles every 1/2 turn. But if your offset the u-joints on either side of the supports then only halve the angle axles would be speeding up every time.