Testing LEGO Tank Suspension...

[@k0lliak553]

The test would be more accurate if you've used sprockets with no teeth in the suspension. In this case, the teeth were caught in the treads, causing way too much vibration and sometimes even the kickback

[@BrickMachinesChannel]

Ah, this is one reason I love this community! I post some random ideas and I get some amazing feedback about ways to make it better! Thank you so much! 🙂

[@Stepchild07]

@@BrickMachinesChannel also might want to lower the center of mass if you do this again tanks are more bottom heavy than top(might change some results but unsure how doable it is) also great content as always

[@openperspective]

isn't a sprocket with no teeth just a wheel?

[@Stepchild07]

@@openperspective depends a sprocket without teeth can still have bumps(ridges)to grip the tracks and move them along

[@openperspective]

@@Stepchild07 So thats what I thought those were. When I think sprocket, I think of jutting teeth like on a bicycle. To me, the ones on the tank were barely there. If I think ridges, my mind envisions machine gears like those in a transmission (thinking herringbone or offsets like a differential). I am interested to see an interface like you describe but doesn't fit the loose interaction I'm seeing here :D please share, always learning

[@manijoly7450]

Very impressive how well you managed to reproduce the jarringly uncomfortable ride the Christie suspension was known for.

[@LettuceGayming]

Gee, i fuckin wonder why the Americans rejected it (british and soviets still went ahead with it tho)

[@laz272727]

There's a reason why all production Christie suspension tanks have really big road wheels.

[@gitgood8509]

@@LettuceGaymingUSSR has mostly flat terrain, so it wouldn’t be as big of a problem. Also Christie suspension allows much higher top speed and acceleration, which deemed quite important for fighting on the flat steppes. But USSR still transitioned to torsion bars, because Christie suspension eats a lot of internal volume, extremely painful for maintenance and has much stricter weight limit (T-34 was about as heavy as suspension allowed). Torsion bars are just much better for tank use.

[@themelonzone38]

@@LettuceGaymingThe Americans DID actually try to get it, they just found the designer to be such an asshole that they couldn’t work together and had to find alternatives

[@lukeskywalket2894]

This isn’t Christie though? This is much closer to the Horstmann design.

[@Mariano.Bernacki]

Now put a laser pointer in the cannon and compare each suspension's effect on accuracy.

[@Squirl513]

This.

[@Cs_cosmos]

This.

[@Fireball7428]

This.

[@Jmatthaeus184]

This.

[@fatalpixel5224]

This.

[@zarrten]

As a bit of a tank enthusiast, I’m very impressed with how well these suspension types were implemented and demonstrated, but I do have a few suggestions that are also echoed by other commenters. Firstly, having the drive at the front of the tank causes slack in the section before the roadwheels, potentially causing problems and instabilities. Changing the drive to the rear of the tank would help with this. This was a historical problem encountered in WWII, specifically both the Americans with the Sherman and its predecessors as well as the Germans with their Panzer III, IV, Panthers, and Tigers (I and II), so it is an easy error to make. Speaking of German tanks, interleaved suspension would be interesting to explore, and comparing how it stands up to normal suspension. Secondly, as @k0lliak553 said, the roadwheels and the idler wheel (or tensioner wheel) should be straddling the center ridge on the tracks, like the return rollers are, rather than meshing with the tracks. This also causes a lot of instability in the tracks, and it should improve the performance over terrain Thirdly, a lower center of gravity would be helpful in lowering the amount of motion the suspension would undergo from the momentum of the turret, improving the ride of the suspension. Another point would be to increase the amount of roadwheels by making smaller versions of the suspension types or a longer tank, comparing a setup like the British Churchill with a ton of small roadwheels to something like the Soviet T-34 with fewer roadwheels. Either way, it is still interesting comparing each type of suspension, from HVSS to VVSS/Christie suspension, and modern torsion bar suspension, and I’m sorry if I come off as a bit pretentious or annoying, I just like tanks and it’s 3am so I’m tired lol. I just think that it could be taken to an even more interesting and in depth exploration with a bit of research and comparing historical concepts, as there is plenty of information surrounding WWII tanks, and it can show the sheer speed of advancement that happened over that 5 year period and beyond. Alright now my yap sesh is over, and imma go sleep lol.

[@Bahamuttone]

Well... for the first point just swap the label forward and reverse and you are done ^^;;;;

[@random_guy_on_yt16]

No Way you did this by yourself you had to use chatgpt no hate

[@Urban-Lef]

This guy tanks

[@Drdstrm7]

Maybe make the hull longer and turret smaller. It just looks really goofy. I honestly would love to see interleaved suspension and could be better than the suspension types he used. Should probably widen the tank tracks for better stability and better off-road performance.

[@haidenthomas6002]

One inconsistency i would like to point out is the different sized sprockets used, as larger wheels will always provide a smoother ride regardless of suspension. When i built my flamethrower tank (butane canisters) i played with a few suspension types. The best one i used was a hybrid of torsion bars and the horizontal but with considerable sag when the machines weight was exerted on them. Tortion bars provided the spring and every set of 2 wheels could also 'rock' in opposing directions. The softer force made the whole ride smoother and less bouncy. Plus when the weight lifted off a wheel it had room to move down with the track but still provided some support while the rest of the weight is being soaked up by the neighbouring wheels. I also learned that a higher amount of small wheels is better than fewer large wheels. That way changes in terrain have less effect on the whole suspension as a collective because it is spread out. The best way to imagine it is if a wheel were to break off, which system would shrug it off like nothing happened. Sorry if im going on a bit of a tangent here. Track suspension has fascinated me since i was a kid :)

[@OmegaReaver]

"Keeps track tension" The Chieftain liked that.

[@Random_Guy305]

Plot twist, these videos aren't edited, this guys just a lego wizard

[@BrickMachinesChannel]

haha that would sure make building these easier :)

[@openperspective]

M night shyamalan plot twist: All of our earthly wars are just the doing of this master builders imagination. While they are the architect of our doom, all we see is the wonderful contraptions. Let us give them more ideas, such that our ultimate demise be both more ironic as well as delightful.

[@gamma2581]

He is a lego wizard

[@scaereyguy]

You learn alot of stuff when you live in the lego universe

[@Andrewgamingandfunstuff]

@@BrickMachinesChannellol

[@shade-storm2054]

HE LISTENED TO MY IDEA!!!!!!!!!!!❤❤❤❤❤❤❤❤❤❤❤ I wrote a comment on the motorcycle suspension test to try lego tank suspension 2 YEARS AGO and they actually listened!!!!!!! Thank youuuu!!!❤❤❤❤❤

[@Nepthrys]

Love the ASMR, please include more attaching lego clicky sounds!

[@BrickMachinesChannel]

Thanks! Glad you liked those sounds 👍

[@messor-was-not-available]

Next video is going to be how you made a shooting mechanism insinde that tank? I'd appreciate that lol 😅

[@BrickMachinesChannel]

I've considered it! It won't be the very next video, but possibly down the road a bit!

[@crazytechnic486]

Also add a stabelizer for the turret with the internal gyroscoop from th powered up hub

[@BrickMachinesChannel]

@@crazytechnic486 very cool idea!

[@Walkertale_Official-Industry]

​@@BrickMachinesChanneladd also a communication way so it can say "Attack the D point!" like in war thunder

[@PiotrMys]

Wow... the part at 12:35 is insane. So so so smooth with the editing and filming. AMAZING JOB

[@BrickMachinesChannel]

Tank you very much! :D

[@mandyay7765]

​@BrickMachinesChannel the "tank you very much" lol

[@ivy7642]

The testing machine is not a good way to test suspensions when turning, because they aren't actually putting any sideways resistance on the tracks. You have to drive them on a solid surface for that so that you actually 'pull' the track sideways to test the suspension.

[@jdbrickcreation]

Wow, I really like the originals ways of using suspensions on a tank 👏

[@BrickMachinesChannel]

Tanks very much!

[@Seriallybreaded_N]

@@BrickMachinesChannelvery clever!

[@drakkon_sol]

Okay, I have been watching these for over a year, and they have become a lot more entertaining with your personal flair sprinkled in. Sure the technical aspect is wonderful, but this video comes across more polished somehow. Sweet tank!

[@smashedpapya2563]

The first suspension type tested is closest to HVSS (Horizontal Volute Suspension) and the Christie suspension is comparable to a VVSS setup (Vertical Volute Suspension). VVSS was used on most M4 Sherman tanks during WW2 but was replaced with HVSS on the "E8" (sometimes called Easy Eight) Sherman variants, along with wider tracks, due to the improved ride quality of horizontal springs; which also seemed to be the outcome of the testing in the video!

[@valthatiserie]

With the Christie suspension, using stronger springs as well as toothless wheels would help smoothen a lot. Some extra mass may help too, specifically towards the bottom of the tank in order to keep better balance

[@furaxerer]

This is insane how much fun an engineer can make of a simple test with no interpreting of the results.

[@BrickMachinesChannel]

It was fun to build for sure! I have a lot to learn about it and don't know enough to interpret the results yet haha

[@KEY-G-BLUESKULL]

@@BrickMachinesChannel huh, your very energetic, fascinating!

[@Lolin_HD]

I like tanks

[@General-iroh]

I like nukes

[@RainyDay013]

I like missiles

[@wise_lynx]

I like turtles

[@RainyDay013]

I like trains

[@TotallyNotMrBeanE]

I like bombs

[@ardermirly3594]

Hard to say. LEGO-Army needs more tests, son.

[@razorbladeflamingo3635]

As someone who likes tanks I'm glad you made this video, really helps with understanding the different types of suspension. (I also like LEGO's and what you make is really cool)

[@BrickMachinesChannel]

Tanks so much! :D I'm really glad you enjoyed the video!

[@GD_MiT]

@@BrickMachinesChannel nice kv-2

[@MickSpener]

Flow with whatever is happening and let your mind be free. Stay centred by accepting whatever you are doing. This is the ultimate.

[@user-jm8sy5ox2j]

One kind of glaring issue with all of these mock suspension test videos is the fact that the suspension is almost always way too stiff for the actual vehicle weight. Your suspension is supposed to be partially compressed when sitting at standstill but all of the suspensions in this video are completely uncompressed until an obstacle is encountered, in which the vehicle needs to be significantly lifted by the obstacle before the road wheels suspension begins to work. Loading the vehicle with weights such that the suspension is ~10-15% compressed when just sitting still would have a massive effect on how smooth it is to ride over obstacles.

[@JulianBen-o3e]

A suit of armor provides excellent sun protection on hot days.

[@jalexvd7037]

I love that in this video you can actually understand how much a technological dead the Christie suspension was

[@Zuckerman3]

I wish I could just learn this stuff and build tanks looks good please keep this up.

[@shroomzzz]

I love the big, giant tank idea. So fun!

[@redguilt7620]

You made a giant suspension simulator instead of sticking the bumps onto the wheel tracks to simulate bumps basically in the exact same way

[@toadking1006]

Insane! Nice work and honestly, something like that is everybodys dream

[@LegoWondersOfficial]

Love the creativity in your content-it's truly captivating!

[@thegreatxcelerator4224]

Great LEGO engineering, well done, Sir! My two cents: 1) Why bother with a mechanical flexible power transfer solution (7:30) for a pure suspension test if there is a hard connection between the vehicle and the test rig via the front stabilizer (8:45)? Its design is clever, so props to you. Nevertheless, from what I am seeing in the video, the connectors are hardly allowed to do their job at any speed (no travel in the system). Friction between the chains of the rig and the vehicle's chains should be sufficient to keep them moving once the vehicle's motor and gearbox are disconnected from its tracks. You still want them inside for their added weight though. 2) Try using sprockets with no teeth everywhere in the tank except for the powered ones. It makes the ride much smoother due to lower friction and thus reduces the wear and tear of the chains. 3) I really enjoyed seeing what difference the various suspension types made.

[@ERIKNOWAKK]

problem of this tank is that its point of gravity is too high and the tracks have small lenght of contacts on the ground, but still nice experiment!

[@SmartLegoSG]

I genuinely think you are the first one to do that. Great job on everything!

[@Reblwitoutacause]

I love lego my whole life. I love erector sets my whole life. But i never got into lego technic. This video has me seriously reconsidering it. Never too late!

[@guyfieri789]

Always excellent. I especially love the variety in topics between videos.

[@BrickMachinesChannel]

That's awesome to hear! Tanks so much!

[@tdeng-h8k]

You've out done yourself B.M. I really hope you can continue puting out bangers. Make a life size tank for me 😆

[@p2e]

fantastic build.. wouldn’t it be an interesting challenge to add turret stabilisation for ironing out the road bumps..

[@joshbrown5644]

Id love to see the Chieftain react tho this. Especially as you included track tensioning

[@DaphenBecher]

All difficult things have their origin in that which is easy, and great things in that which is small.

[@malekiththewitchking2799]

I'd like to see how a Christie suspension would fare being made out of Lego. With a typical drive sprocket and one with an inverse drive, examples include Cromwell having a drive sprocket and the T-34, having the inverse system.

[@BrickMachinesChannel]

Do you mean more than I tested during this video? The Christie suspension is the second one I tested

[@malekiththewitchking2799]

@@BrickMachinesChannel Yes thats what I meant, sorry for not elaborating.

[@BrickMachinesChannel]

@@malekiththewitchking2799 no that's okay! It's a great idea! I like that suspension a lot 👍

[@malekiththewitchking2799]

@@BrickMachinesChannel Or perhaps you could try the coiled spring suspension such as on the Churchill or the Horstmann suspension seen on the Valentine.

[@elizabetpro]

Cool to learn about the different types of suspension. I love how educational and cool your videos are!

[@BrickMachinesChannel]

Thank you for watching and leaving such a nice comment!

[@Bricky_Gamer]

Another great lego creation! Please keep making amazing lego creations like this and never stop :D

[@BrickMachinesChannel]

That means a lot! Tank you!

[@Bruhtoi_bramble]

This is impressive with only one of the ev3 or nxt looking at the colors and being able to control it with an Xbox controller is awsome

[@JessWLStuart]

Loving this project!

[@ShellyHill-n6x]

Unbelievable ... so ... so ... cool. ❤

[@shadowscythes]

As a mechanical engineering student myself I was predicting certain things while watching this like how the tank would just fall off without support 😂I actually made a moving tread once for a build (though not with motors), difficult to get right if you aren't used to it but fun to play around with, very neat experiments and I love those connectors to make the speeds match Unrelated but just curious as to whether you plan to have more videos with speaking commentary in the future? I've been enjoying the cool builds but I do also kinda miss the style of your older Minecraft recreations videos, I hoped you hadn't given up on talking haha

[@ManlmDead]

This is a fun idea, but maybe you should possibly create helicopter 🚁! I would love to see how you would build an efficient yet fun helicopter!

[@Taintedl3lood]

I would love to see a more extreme version of this test but also stabilization of the turret cap it was all over the place

[@moltensh4dow506]

the slow motion when it’s moving reminds me so much of setting the speed low on my clunky tank made in besiege

[@Infernoblade1010]

I am a simple man,I see tank tracks, I click.

[@richardvanbeek7763]

Awsome! Now take it outside for some field testing!

[@alvarosanchezmartinez7050]

Maybe some extra weight on the chassis of the tank could reduce the vibrations, because the more massive the object, the more inertia it has and the more it resists to being moved.

[@LegoBoomSG]

full of technic skills, love your video

[@ElijahKatharine]

The thoughts we choose to think are the tools we use to paint the canvas of our lives.

[@kaiperdaens7670]

Guys you might not believe me but I think he works for the secret Lego military research department.

[@sage5296]

Just with how it's built, it does appear that the mock tank is very top heavy, that definitely affects it a fair amount. I think the turret mount might also need to be a bit more rigid

[@zJoriz]

"Whaddaya mean we can't run the third test? This doesn't make sense unless we test all the alternatives." "Apologies sir, the entire turret crew of the first test are in the hospital with moderate to severe brain damage." "Well, that's what the replacement crew is for. Did you--" "Their funerals are tomorrow, sir."

[@horneteater99]

hey, idk how heavy it is but ive found making things heavy makes them a bit more stable and smooth

[@Byte_Youtube]

I love your videos! You should try to make a technic car an rc car!

[@BrickMachinesChannel]

Thanks so much! That's a great idea!

[@AlanNell-i9i]

Love does not consist of gazing at each other, but in looking together in the same direction.

[@MontaGrote]

Our kindness may be the most persuasive argument for that which we believe.

[@ColbertChristopher]

What is new in the world? Nothing. What is old in the world? Nothing. Everything has always been and will always be.

[@AdelaideBecky]

So long and thanks for the fish.

[@legPhase]

your videos are getting better and funnier

[@smartlegoBR]

Your passion for LEGO Technic really shines through in your work. I can tell that you put a lot of time and effort into your creations. Keep up the great work!

[@dtec30]

The biggest test would be if you can keep the turret stabilized as it rotates going at speed over bumps

[@2alawabidingcitzen]

This was 🔥

[@morganlefevre7068]

maybe, its my feelings, but, maybe more weight and longer véhicle to match more to real ones will make the suspensions work more accurately

[@baraka629]

Aint that the Christie suspension. Try the torsion +-axle suspension next 😂

[@JackVermicelli]

With the change in suspension type, he throws in the confounding factor of different number of road wheels.

[@slyfox1489]

Someday i believe we will see a starship out of lego

[@BrickMachinesChannel]

That would be so cool!

[@prosvade1337]

lego should authorize and endorse this. (i saw the end screen)

[@oscarhenville]

Truly a weapon to surpass Metal Gear!

[@jules2545]

Its just as well Ferdinand Porsche never watched this video, he would have had a World beater in his version of the Tiger tank.

[@LindsayCorff]

Waste no more time arguing about what a good man should be. Be one.

[@Evan-qs3cm]

If I had a million dollars then I would buy something like this.

[@MiniLegoSG]

please include more attaching lego clicky sounds!

[@flightmaster529]

It would be smoother if you replaced the suspension with wheels instead if middle gears. The drive and tension gears are fine, but the lower portion would be smoother with wheels.

[@JoWollaston]

It's a skateboarding penguin with a sunhat!

[@layladonaldson3429]

i think if you included a flywheel somewhere in the test bed it would better simulate the momentum of the tank as it moves over the terrain, and you wouldnt see the stop/start motion of the wheels and treads

[@BrickMachinesChannel]

Great idea! I think more powerful motors or batteries would also help

[@TheresaWalsh-k9r]

The gruff old man sat in the back of the bait shop grumbling to himself as he scooped out a handful of worms.

[@tiodrakul]

I was wondering how many parts you ended up using in this monstrosity haha :D

[@BrickMachinesChannel]

Good question! Maybe about 2500? Not as many as you might think since the machine and the tank turret are hollow

[@thegamesquad5133]

i think the extra turret tests were unnecessary since it doesnt shift the center of mass all too much, and when the tank is held in place, the center of mass has even less of an effect without the effect of stored inertial movement.

[@BrickMachinesChannel]

That is a good point! I didn't notice as much of a change as I thought I would, though it does place extra weight over one side of the tank or the other, stressing the suspension more

[@mikepetersen2927]

Awesome video! Nice editing & sound effects. I'd love to see how you store & organize your vast Lego collection. It's a shame you went through the process of devising variable-length mechanical synchronizers, only to remove the need for variable length with the front stabilizer. 🤔

[@BrickMachinesChannel]

Thank you! I use Craftsman 9, 30, and 39 bin storage organizers for small parts and some larger drawers for bigger pieces. Actually the front stabilizer does not eliminate the need for variable length mechanical synchronizers. As the tank goes over obstacles, the distance from the tank axle to the machine axle gets longer and shorter still, but it isn't as pronounced

[@captain_kirkyt2481]

You should do one of these with tank turret stabilization

[@Just_someone32]

Next video: testing a thermonuclear bomb made of lego

[@djo_man]

There isn't nearly enough weight on the torsion bars for them to do any actual damping, and if you add that weight, those plastic axles are going to plastically deform. For tanks, the closer you get to real size, the more accurate results you will get. (Hint hint wink wink)

[@Devthedev.]

the torsion bar suspension was hard to watch

[@mineyunus1574]

Come tomorrow and start making pallets for the Altay tank.

[@pptai]

Soviet Klim Voroshilov - 2. Awesome! 👍

[@invincible3246]

Yes, the KV-2, the Russian Death Fridge

[@GD_MiT]

I approve

[@Ghost_D4A]

I just can’t stop thinking about how much it looks like a t110e4

[@TheJohtunnBandit]

Looks like a chibi tank :)

[@Send_jet]

Sooooooo, you basically made a KV-2 or what I call “The Cube”.

[@GD_MiT]

I also thought it was kv-2

[@CC-S6-01]

I feel like the tank needed more weight in. Great video.

[@BrickMachinesChannel]

Thanks! I appreciate that feedback and it would be cool to see it with more weight.

[@andreaperri3293]

I suggest you to recreate Italian's WW2 tank's suspension because I think they're the best, they were designed to climb over Alps

[@BrickMachinesChannel]

Oh great idea! I need to look into that tank suspension

[@AaMikeyTSBG6]

some pieces looks kinda sus….but its amazing u deserve 10M subscribers

[@gavinkarnatz9842]

The real best one is the friends we made along the way.

[@Phil926]

That looks like a super chaffee

[@JacksonCarey-sy3bt]

Yyyaaayyyy finally someone who actually appcreats xbox

[@TrumanStevenson]

When you don't know what you believe, everything becomes an argument. Everything is debatable. But when you stand for something, decisions are obvious.

[@ivan-r_]

After the tank was rigidly secured relative to the test bench, speed synchronization became not even useless, but harmful.