Couldn’t agree more

Yeah me too

So true

Yeah, I always get so excited when one of these videos come out and a bit sad when they end

yep, I need V6, V8, V12 and V16 :-)

engines go brrrr

All except the flat 2 boxer

Petrol engines literally vibrate with anger.

But some more than others. This is an important consideration in real combustion engine design.

@@liambohl Boxer motor + least vibrations - needs the most space - needs the most material for the motor bock

Exactly! The rotary engine actually sounds like an aircraft.

@@computernaut rotary and radial engines are two completely different things. People have made actual rotary engines out of LEGO too.

@@kyrian7600 Oops, my mistake. Meant to say radial.

Used in aircraft during WW1, car racing up to around 1960, and race bikes in the 80's

@@mojothejester9889 looked into it and found out all I needed to know, great comment innit

Bro you know where to buy this legos

@@mojothejester9889 And a U-12 diesel was also used in the M4A2 version of the Sherman tank.

Even better when it happens twice on the same engine!

And then it starts looking like it's fading

It's called aliasing, and it's a really cool effect.

This has nothing to do with frame rate. What you mean is the shutter speed :)

@@BanterEdits Shutter speed has absolutely nothing to do with it, he is correct, it is framerate.

this seems possible with this guy, but where's he going to get lego uranium

@@calebchan9411 Don't worry he'll just use REAL uranium.

LEGO chernobyl

@@calebchan9411 probably green see-through studs

hahaha thats what i was thinking, eventually this guys gonna be the first one with a lego rocket in space

The 900cc Kawasaki Eliminators from the '80s had straight 4's as well.

Almost 90% of all cars have this humble, reliable little engine.

maybe not the H4 tho

at the right rpm, you can kinda hear it

AAHHHHHH 666 LIKES

its only because the shakiness makes it sound that way

If he can make lego engines, who knows what he could do?

@@abox1209 next video. How to creat a nuke atomic bomb with lego

I can't wait till he starts building lego gearboxes

Just wait until he starts making pneumatic motors

@@abox1209 how about a lego engine that drives an axle versus an axle that drives an engine?

@Sekačka Obecná I think he did tho

@Sekačka Obecná oh that’s cool

Glitch-dood

@@chrislong811 Chris-Short

Makes sense though right? On 180° the forces are offsetting eachother while the pistons are "firing," while on the 360° both pistons are exerting force at the same time in the same direction

@@gobblu would the 360 degree vibrate expodentially more because theres nothing stopping it?

@@benevery no they would hit a max vibration travel and start moving of there own against the friction of the table, if youve ever seen a construction packer it moves off vibration

No Straight-6 though - that would result in no vibrations at all

​@@gobblu An inline twin with phasing like that is uncommon. In a 2 stroke the pistons would be 180 degrees apart. and so would 'fire' evenly as every time a piston reaches the top, there's an ignition. When motorbikes started moving to 4 stroke that kind of twin setup ends up not working well, as each cylinder only fires every second top, so you'll always have uneven spacing of the ignition. which also complicates the ignition system as well as making the engine feel 'lumpy' The solution is to set the pistons 360 degrees, which means each piston still fires on every second top, but the ignitions are staggered so you still get one ignition per revolution. Vibration is taken care of by a larger countereight than on most engines. Such a system has the same basic ignition a single cylinder uses, it simply fires both plugs at the same time but because one will be at the top of the exhaust stroke it does nothing, hence the term "wasted spark ignition". Wasted spark is used on all sorts of engines, even modern ones where pairs of pistons both reaching TDC together, but on different phases, spark together, which can greatly simplify the ignition system. In twin cylinder 4 strokes there is a more illusive "big bang" set up which if you mess with the cam shaft you can put both pistons in a pair into the same phase and they fire together acting like a big single. People do this mainly to make the bike feel punchier, though there's no extra performance to be gained as double the power is offset by double the time between firing.

that's why engine balancing is big deal just look at flat boxer 2 and straight 2 180° they don't need additional weight for balance

@@3rdDanPrime The best balanced engine layout is straight 6, they dont need balancing shafts at all

The more you know

I bet the U2 & H4 engines would be smoother if the 2 cranks were 180° apart

I would have thought that he would just naturally offset them by that but ig not

@@hurlaky43 you would have less vibration, but the force would be turned into torque instead of linear force, which if it were a real engine may be less desirable

and the smooth running glory that is the straight 6

@@lancepharker I was hoping for an i6 maybe another video with more engines hehe

[really cringe reply 'bout being first]

Haha second go brrrrr

everybody gangsta till he quad-turbocharges a 4-rotor 787b dorito

I haven’t seen you in a while

LEGO LS SWAP

I've made a cross plane V8, but I had to cut a piece shorter to make it. A flat plane V8 us just two of the inline 4s sharing a crankshaft, so has all of their properties. The cross plane is smoother, as it doesn't have the secondary imbalance than a flat plane has.

I'd love a straight 6.

V8s irl are super cool...

Straight 6 doesnt need counterwrights, but its impossible to make with lego becouse you can only put the lego pieces in 4 different direction, i6 needs dividability by 3

Would like to see a W8 and W12

the radial engine, knows where he belongs, the sky

@@IamJmc1992 the only thing that grounds them is a tank, like the M-18 Hell Cat

So is the M4 series for a while

Jokes aside though, those things are pretty much just attached straight to the propeller with nothing really in-between (with a little exception during WW2 involving a certain model of Sherman tank), so not to surprised that it shook the test rig to pieces, when the angled tail shaft got involved. It was very cool to watch

@@moohooman I mean, it's not really a "certain model" of Sherman. The majority of them used radial engines. The weird Shermans are the ones that *didn't* use radials. Like the one that was used some of the British Fireflys, 5 car engines strapped to one flywheel.

poverty sucks

SUS

@@handletemplate indeed

Amogus Sugoma Amogoma.

Oh god it's amogi

now we need an R18

Maybe because this is propeller engine? Hm...

Some WWII propeller planes (mainly naval aircraft) used radial engines. Those meant for land warfare mostly used inline engines.

Radial engines in aircraft I’m familiar with used an odd number of cylinders, that might be an interesting comparison. Are there “modern” radials with Ann even number of cylinders?

@@h8ter1927 Given propeller planes are hardly used nowadays because jet engines have taken their place, probably not. The advantages of a radial design in WWII planes are that the structure allows for more airflow over the pistons, aiding in cooling. Also, because more cylinders are used, there is greater redundancy in case of damage from enemy fire. These points are largely moot nowadays, so I think this is unlikely.

The old planes used a engine configuration like that

@@soumadelezo4867 yes thats the point

@@soumadelezo4867 damn bro, for real?

@@caramelldansen2204 Many of them are. Radials are among the first types of engines used for aircraft, but other engine types are used as well. In fact, the Wright Flyer uses an inline 4 engine.

I mean they all do if you listen close enough

To show engine you must build engine out of small plastic bricks

@Ivan Varela understanding the monst basic fundamentals of how each engine works is a very helpful thing to know. Because a lot of the time since it is a integral part you can work backwards from there to fix the problem

@Ivan Varela as long as their is internal combustion there is work. And even if we move away from gas we will probably still use internal combustion for a long time

@@casematecardinal let's hope so :(

Impoter sus

And people wonder why they last so long

Not fully - straight six is better in this aspect.

@@mshathlonxp i6's have no primary or secondary vibrations. I4's only have no primary and i3's have no secondary

@Ivan Varela Let him be he vibing rn

@@augustopinochet6899 yes but inline can have trouble with crankshaft twist resonance

Even though there wasn't any Subaru boxer in it... The H4 IS NOT a Subaru flat-four... The subaru F4 has one crankshaft between two cylinder banks. The H4 has 2...

@@Ghostlight89 the 2 cylinder boxer he made had almost no vibrations at all.

@@Ghostlight89 4:57-6:01

Maybe for low vibration but no mechanic loves an h or a boxer

Subaru makes horible and unreliable engines that will either throw a rod or blow a head gasket after 50k miles

You're right

I agree.

I was waiting for the straight-6 and its exquisite balance.

Dumbass... What about balance shafts? Theres none in lego engines... Real engines have balance shafts tô preveting rocking motion

Would have liked to see the H4 in a boxer configuration like modern cars actually use.

@@ironcito1101doesnt work because the crankshaft needs 120 degree angles

For the radial engine, he put a relatively large mass on the throw of the crankshaft and then only supported the crankshaft on one side. There was only going to be one ending to that.

You can actually use Legos to test the balance and durability of an engine design... what the fuck

@@pneumaticslap3344 To a certain degree? of course you can. Anything with weight will be able to have its fundamental physics checked as long as the movement is the same as the full-scale machine and all parts weigh the same in relation to each other..yes of course it's a good design.

Yes, although I4 has great primary balance but a pretty bad secondary balance. Also he should have held the assembly in place from both ends not just one on the radial.

There is something similar in the Lamborghini Lego set, just no clutch. It has a shifter to engage and disengage the engine along with paddle shifters.

@@Leingod2005 you mean the LEGO technic sián?

I was the 666 person to like that comment

@@collins9708 668

How to build your own car using Legos.

This isn't really an explanation of how engines work. However, it _is_ an explanation of why certain cylinder configurations are more stable than others.

Those are jus the shapes

no

@Vrylle Llagas Yes it look lot more stable when both cylinders have different momentum.

The I2 design won't be ideal in a typical Otto 4 stroke design. Because the power stroke is not displayed here the balance is good but in reality the near 180deg of no power rotation makes the design questionable. E.g. Fiat tried to make a 1.0L TwinAir 2cyl turbo for the 500 city car back in 2011. It was a novel concept but alas it idled rough and was far less refined than the 1.2L 3cyl and the MPG gain over the TwinAir was negligible. Needless to say the Twin Air was discontinued from the Fiat lineup by 2017.

Just imagine how stable the straight-6 would be.

The H4 should have been the same, had the lower pistons moved oppositely to the upper ones, as they did in the real engine - and as they did in the various "square four" engines, which were similar. A square four is probably more accurately described as a U4 engine, though. The 180° twin is very common in motorcycles because of the balance improvement and where the uneven firing isn't a problem, it simply adds character. 270° sounds sweeter, though - like the 90 degree v twin.

Yeah them being more stable is some of the big reasons certain engine designs are used more

Here are the S2 180°, the boxer and the 4 banger, most of configurations aside of that are imbalanced because mass displacement is not compensated.

In real life they're always balanced by adding counterweights, if necessary

And vacuum engines, they are easy to make

God, the ideas to try if money weren't an issue.. I've been addicted to watching Lego pneumatics for years

What do you mean "self-powered" by air? They're not perpetual motion machines

@@sgbench I believe they just misspoke a little and meant "powered by air"

@@sgbench They don't require motors or anything, just compressed air. Here's a video of a pneumatic engine:ukposts.info/have/v-deo/l4Gihn2nq6xklWg.html

to lego space

Yeah!

probably next video

He's making so cool stuff, and I'm making only lego beyblades lol

@@k42uy4 this actually seems possible with this guy he knows his stuff - imagine if he made something that flew to the moon and put something on there (get where the reference is from?), that would be really complicated, probably nearly impossible, but super cool!

I can also suggest engeneering explain if you hav not seen it yet

Except if you want to get into designing engines you probably won’t have a job by the time you finish engineering class because electric cars

If you don't know this before going to collage, you won't have a good time

@@evyb3590 im engine engie specialist and electric cars wont take whole industry

@@trololollolololololl yet

Same

No surprise why almost all car manufacturers use the straight Inline 4 for most vehicles. It is a very balanced and effective design.

@@Trades46 and more efficient than use more than 6 cylinders, the known Castrol Supra had a inline 4, also rally cars usually have turbocharged I4 engines

The F2 Boxer also ran incredibly smoothly. It's so neat to watch how all these engine designs work.

@@matthewmondragon2074 WRX has a turbocharged flat 4 engine. Shame he didn't show that in the video.

Yea I was waiting for them, hopefully in the next video, also W16 would be great if it's possible to make from legos

@@damjantasevski5769 it is i have the lego chiron it has a W16

@@damjantasevski5769 the Bugatti w16 engine is basically two VR8 engines back to back with the staggered pistons, no idea how you’d create that in Lego, might have to get creative

@@jackalovski1 the Lego Chiron uses two V8s next to each other, when the real one is basically two VR8s with one crankshaft. It could be done but it would be very bulky and the proportions would be off, as the pistons would need to be a fair bit apart to get the angles right.

It's so cool to see which configuration have most and least vibrations. Also most of them had a RPM sweet spot where the forces almost cancelled eachother out and they ran smoothly. A V8 with 90 degree vs 180 degree crankshaft comparison would also be awesome.

What’s Dargon

Same

@@chobyriley417 nothing it's just the last boss in minecraft

thats how some Diesel engines works

@@random-ve7sf the one quiet kid?

Wait until you see a inline 6. It should be the most balanced.

@@random-ve7sf Wow, how do you know this stuff! You must be really smart or something, can you explain how other diesel engines work too? Again, super impressive, "some diesel engines use inline 4", fuck haha did not know that! (holy shit I'm such an asshole lmao)

@@random-ve7sf fr? I thought those ones used electromagnetism

Tbf he could have so he just didnt include that part

The u2 at 7:20 had a crankshaft fall off

You mean Cardan?

@@rageagainstthebath yea , they are the same thing right?

With all that gearing up, the motor doesn’t have anywhere near the torque to break a u-joint. Now, if the gearing went the opposite way... then, there’d be cause for concern.

@@capnplaidbeard oh okok , well i am just a 17 yr old teen lol how would i know that 😂😅

@@animatedsurvivors8792 School? Lol 😂

It looks like the pistons should be in opposition of phase when going in the same direction and in phase when in the opposite direction for the "engine" to be stable. I think the one you mention is extra stable because of the symmetry that the similar two piston one doesn't have for instance

Actually the boxer engine is even more stable because the pistons go in the opposite direction basically mirroring each other. The 2 cylinder model shown generates almost no vibration and manages to do so with 2 cylinders less than the straight 4.

@@Robozgraggi yes but it's also less powerful, and as well the "consistentency" of the power begin generated should be taken into account, As I believe the less consistent the power the easier to stall. Ofc I am not an engineer or mechanic and thus discovering the "Efficiency" and value of these engines is just speculation on my part.

I just wish he went up to an inline 6, as that is the most "naturally balanced" engine configuration possible. Similarly a v12 (basically 2 inline 6 engines) which is why both configurations are both loved so very much

@@Nessinby I have no idea what you mean by "consistency" and "less powerful". In terms of overall performance the boxer engine is better. But it's more complex and expensive than an the inline engine.

Heyo

sup

That boxer engine won't vibrate...

@@triaplayzz701 thats what she said

Should I dare say "head gasket"

H and U engines were used in aircraft during world wars, racing cars around the 60's, and bike racing during 30's (H engine) and 80's (U engine)

Or a V8 😉👍

V16

But you need 120° crank

@@MichealleShoemaker I bet you could fashion a 120° crank with the 6-hole wheel used in the radial-6

@@hurlaky43 maybe

Or the Bugatti Verrinn W16 one with 6 cylinders on top and 5 on each side

Or a Napier Deltic.

@@G31M1 the Bugatti "W"16 is actually a vvr16, different design, probably nearly impossible to do in suach a small scale out of legos.

yeah a lot of WWII naval planes used R5s and whatnot if i recall

Or piston?

tbf avenger, f4u corsair, f6f, f4f, sbd dauntless, p47 thunderbolt, many more

In the beginning of any field, its balls out insanity as engineers are searching and experimenting. Notice how most of these engines are from old motorbikes. As a field matures, efficiency finally sets in. Notice how similar airplane designs are as compared to WW2 era planes. Or cars.

When the crankshaft is SUS

Wouldn't that be a V4? Or is that what you're saying?

Cause part 2.

Probably video length

You know he can build a W8 engine car.

It could be cool but the probleme with almost all these engines that they will requires modded pieces to do a realistic crankshaft

I appreciate that you pointed out F4 in the very end!

That joke ain't gonna work right now...