Survive Tests - Lego Mechanical Principles

I decided to check how effective the popular mechanical principles of Lego mechanics are. Tested with high RPM and high-torque mechanisms to determine which joints are more durable. I hope you will like to know it.
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00:00 CV joint
01:48 Schmidt coupling
02:44 Belt drive
04:00 Bevel gears
05:24 Chain drive
06:51 Gear drive
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[@DrEngine]

I have verified that a tensioned chain works better, thanks for the advice.😊

[@katyaguv1733]

😊😂😊😊4🎉❤

[@ggcvhfc6530]

I love your videos Dr. engine

[@user-yw1vi4um9z]

At 2:57 the head just yeet ☄️off its not the belt fault😂😂😂😮😮😮😅😅😅

[@VillegasLeGo]

love you

[@user-kv1xd7ly5e]

can u do a collab wid td brick please

[@logtrimmer]

I feel like the chain drive might have worked better lifting if the chain was not loose.

[@stopmotiondoctors]

Same

[@Moriarti]

a chain stabilizer is required

[@theUnitedindia56]

Yes you are right

[@kbeightyseven1783]

The chain needs tensioning correctly

[@AtomicA7]

True

[@poelmeister]

That chain drive test wasn’t fair. The chains was too loose. That’s no way to test its strengths. You think the timing chain in a car would slack like that?

[@SWellWellWell]

And this can affect the speed?

[@user-bk2bk9zh8q]

@@SWellWellWell, not on such a test stand. But if the shafts are fixed more well, then at a higher speed the chain will start to fly off without a better tension. And it will not slip as in the maximum load test.

[@leviparrow1532]

i think the chain and belt drive wouldve done alot better on the rpm test it better tensioned

[@AtomicA7]

If the lifting rig was more rigid and strong and didn’t bend most of those failed ones would have lifted more also you said one failed but it failed because the lego persons head came off because of the centrifugal gs it was experiencing

[@AtomicA7]

And others failed because they weren’t secure properly

[@AtomicA7]

Also the chain one even though u did reinforce the structure the chain was to loose

[@legoislandstuff8773]

he knows gears just not structure

[@lukasrockwell1935]

The gear drive should have been the best if he fixed his stand

[@Gregzenegair]

Yeah, the test of some are not optimised, some times against a bit more weight, tweaking , you would win reliability

[@grande1900]

I think the thing that needed the most strength was the stand lol

[@comradealex85]

The rig and its insecure mounting are detrimentally affecting the results. The test rig in itself should be the strongest component to a test.

[@Xaxationlorex]

Test rig needs some major reinforcement ,lots of straight runs with no cross bracing. Chain was also super lose with too many extra links. Some resigns and another test seem in order.

[@hardstyle4evajarhead]

When the engine and gearbox side flipped under the weight i lost it hahahaha! love it!!

[@DrEngine]

Glad you like it ☺️

[@edwintorres4224]

I feel like the test was unfairly made.

[@unibrandon]

it was unfair the chain link was way to lose

[@DrEngine]

Lego allows for many mechanical principles. I decided to check how effective they are. ️ Are there any suggestions about tests?

[@DrMindstorms]

I would make the structure for pulling the weights a bit stronger, therefore the mechs can be pushed more to their limits

[@DrMindstorms]

And ofc, excellent video!😁

[@xyxxyx4883]

it would be great if you wolud just make as high torque as possible lifting

[@user-bk2bk9zh8q]

I think that with a stronger fastening of the parts of the 4,5,6 mechanisms, they would be more effective. And probably the 3rd.

[@nitroboom1282]

Could you try the chains facing outwards? It really helps performance

[@marcosacceleronhotwheels2806]

3:01 is no one going to talk about how the lego man head simply poped off due to how fast he was spinning

[@joaovictorbombonatodepaula3133]

Bro was straight decaptaded

[@nicolethetigersharklatex7858]

Just love how it failed and passed at the same speed

[@Merecir]

I am sure I must be the first one to mention this, but the chain being so loose made the test unfair.

[@xxforDJofficial]

Try tightening the chain link, that makes it stronger

[@janaepeso7417]

The gears look like they are about to break the speed force of DC lmao

[@user-no3vf9ry8u]

I bet the structure will break or not. hahaha. Emotional!!!

[@mattimotion]

I love these Lego Gym episodes

[@DrEngine]

Thanks 👍 It was fun to make!

[@bdlc9952]

the chain drive is better than the belt drive because the belt relies entirely on friction while the chain drive has a hook like design

[@DroidzandBrix]

That gear drive could have gone much faster if you put another beam in front of the gears

[@crazynachos4230]

Yet it was there for the actual lifting test

[@JamesTDG]

5:43 that doesn't look like an issue with the chain and more an issue with you adequately anchoring the gear

[@okipullup9036]

I'm pretty sure it would be inadequately

[@kasuraga]

The chain and belt drive tests should be redone. They didn't nearly have enough tension on them to be effective.

[@johnniebarker5368]

Yay satisfying Lego things back

[@blackholetree]

Ok but the subtle detail that the lego minifigure's expression changes are being spun the first time is golden

[@DarkVoidIII]

Dr. Engine should call in his doppelgänger Dr. Engineer. This rig was interesting, but needed some serious structural improvements! I tested LEGO pneumatics when I was younger, it could lift a few pounds. Most models needed sufficient weight in the body though or it would topple too easily.

[@Circ]

The belt drive might have done better speed wise if it had a convex roller on one end to help center the bands. The concave indentation wasn't enough, physics

[@martinteece8983]

For the higher test weights would it not been a more fair test to Stableise the structure with braces

[@kevtheoggamer6672]

At least the mechanisms breaking looks satisfying

[@AshleighCaudill-bj6nc]

I love these videos

[@ZephytheDragon]

The CV joint would've reached a much higher speed without the unbalanced weight on the end of it....

[@user-kv1xd7ly5e]

idk to say but tension plays a big role in the chain. i have tried this myself

[@lupinzwolf98]

The chain being tighter might have improved proformace

[@SwatDood-qk6hs]

Poor Lego guy, before the first test, he was confident. After the first experiment, he was scared!

[@SpeedCube2]

It seems to me that bevel gears is very underestimated, because if the structure is made more durable, it will be able to pull out more revolutions per minute

[@TessaAndrews]

it's kinda funny to see the pulling mechanism just cripple up.

[@Corvus__]

Test Pilot The Destroyer of Drive Systems

[@nyscersul42]

You need a diagonal brace off the pulley mount to the drive system... no flex then, all your system is expecting that one not reinforced point next to the drive pulley can handle all the stress.

[@carbonphantom1]

Did that chain dirty as heck

[@phalinangel]

Tighten the chain up!!!!

[@Zung92]

2:12 Bro, this moment made me jump scare lol 🤣🤣

[@simon2cool4u]

On the gear drive, It was unfair because the gear fell of because it was not secured properly, so you said it failed.

[@necrovarius225]

RPM on the belt drive wasn't fair. The belt drive didn't fail, the minifig did.

[@carcollecter98]

You ever wonder why chains are, you know, tightened? This is why. Your test was done incorrectly because the chain was horrifically loose. If that chain was actually tight like its supposed to be, then it wouldn't skip the teeth on the gears, and it would perform much better. Maybe give the chain another chance by actually doing it right.

[@VLAME5846]

The chain drive has MORE POWER than a doge challenger

[@delavanty]

I'd also recommend using the locking caps Infront Of the gears on the skin colored gears they would stay better

[@lag_z7716]

holy shcmidt coupling! The gear drive was insane, it lifed 1.5k pounds!

[@thiagoalexi794]

Wife: What are you watching this late at night? Me:

[@Soupcan741]

If you want me that chain a little bit tighter it would’ve worked

[@jtgamer108]

2:56 his fokin head flew off!

[@user-nz7id3zd9k]

1:55 astronautics

[@samurottstudios2066]

Totally could've tightened that chain

[@JacobL228]

Your chain drive looked way too lose. You may want to take off a link or two and retest with a tighter fit. Also, the gears on your gear drive flew off because they were exposed on one side. I don't think that wound have happened if there was a liftarm element on both sides.

[@unibrandon]

on the lift test there was one

[@gladiatorone9023]

NEED! MORE! POWEEEEER!!!

[@derekhale7948]

The gear drive might be the easiest to fix

[@VIP-ry6vv]

Dat chain tension tho.

[@joaovictorbombonatodepaula3133]

2:55 Warning: This scene may be disturbing for certain lego audiences

[@robertsummers3386]

Maybe don't have a loose chain on the chain drive, and it'll work better.

[@amycosmicpuppy]

Lol, with the gear drive, everything except the gear drive was breaking

[@VTGSVG]

Didn't hit 10,000 rpm? I think the vibration is the problem. Dude get it on.

[@fry22wr]

5:37 use the force

[@JBRIX]

Test pilot will return... :)

[@anonymous-mj8wb]

chain was to loose. it needed a tensioner. then try again.

[@meettheamazingbestaimer]

5:35 bro was like **oh shit** 😂😂

[@delavanty]

The chain drive could have been a bit tighter it was looser than my father's belt after Thanksgiving

[@athanbelo6369]

Make working chainsaw out of lego pls

[@Rattlesnake3170]

Uh man that Tower there looks like it's gonna break

[@NisargRaval-hh9dh]

Make a waterpump using lego

[@devenbelanger8463]

Chain drive was a joke. Take a link out. No one runs a chain that loose

[@alfianfahmi5430]

Bruh, those chain belts are loose as hell. No wonder they slipped everytime 🗿

[@Yora21]

How is the little guy mounted to the wheel? It spun so hard his head flew off!

[@MaccasAdventures223]

also when the slots on the chain face outwards it works better

[@LunarcomplexMain]

Everything seemed fine up until that loose chain, why on earth would there be so much effort into this just to lead into using a loose chain?

[@liammcquillan6851]

chain and belt drive should have had tenstioners

[@SpamtonG._Spamton]

i wish that there were more

[@toygarage-artofplay9798]

Awesome, how you calculated ?? ❤

[@FSSRTNO]

3:04 dang

[@AdamSlabikowski]

3:02 left: 5600rpm - pass right: 5600rpm - fail

[@Taijitu527]

1:14 speed is so high it looks like is static on place

[@dz-abouttechnique1849]

Cool!

[@einufo]

I missed the cardan transmission!

[@Mrskarr3524]

I bet the gear drive could have done 2kg

[@barrianic4]

1.5kg broke part of the lifting wheels at the top

[@galenvaleskamuhammad3386]

Awesome

[@user-jr2ue9nu6y]

LOL Poor lego man

[@KrystineChristenson]

Yeah you definitely need to make a better rig for the lifting test

[@DrEngine]

Working on it!

[@marktegrotenhuis]

Almost all of these failed because of structural strength/durability, not because the mechanism itself failed. A true mechanical fail would be skipping teeth, breaking gears, breaking chain, twisted rods and breaking rope.

[@williamhodges7957]

I feel bad for all of those technis pins

[@karnyamaw]

Can you test adding a proppeller

[@KolejowySzynszyl901]

Dr. Engine. I have a question. Why chain drive pass before reinforcement 500g and after reinforcement you said it didn't pass?

[@ziamahi247]

💛Beautiful next video💛

[@Morjensful]

Wouldnt call this satisfying because I felt the agony of the lifting mechanism.

[@Bubbibjoern]

You made the chain way too long, it would not have failed that easily.

[@nukem9504]

2:55 - 3:04 It seems the Lego tester lost its head over the test results!

[@tyreewadsworth1593]

You got to tension the chain more

[@YourAverageMTBerlol]

Brooooo! That fucking chain was so dam lose no fair😤

[@thespartanamongus1121]

The chain drive is not set up properly. You can easily take two, maybe three links off of the chain and it'll work better because it's taut and not loose.

[@griseldamartinez8917]

It sounded like a helicopter 0:25

[@user-xh1me7bu7x]

Hello, can anyone say what is the name of the app used on 0:39 to control engine speed? Is it mobile phone or other device?

[@DrEngine]

buwizz app for buwizz.com/shop/buwizz-2-0-2-x-buwizz-motor/?ref=196

[@brodygamer83]

6:48 bruh tighten the chain

[@ttyttcukbbllllejlttoryjlrt513]

6:47 - remove a couple of links from the chain

[@oldhorn420]

Or make a thing to adjust the tension of the chain

[@alejo1003ful]

Una plataforma más rígida y un par de poleas extra podrían ayudar a que varios funcionen