Flat vs. Boxer Engine 

How do you like this type of the video? A bit different, the LEGO offers beautiful possibilities 👌🏻

TLDR : Boxer : Bang-Bang-Bang-Bang 180° V : Left-Right-Left-Right

Fascinating world of mechanical cylinder bank angles, firing orders, firing intervals relative to crank angle rotations, and the soundtracks all these different configurations produce.

Last time I was this early Boxer powered cars still had Swastika logos. 😬

And then we have the BRM H-16 engine.. the worst parts of an flat engine, times two...

This is my favorite RU-vid channel, love this channel and thanks for such an amazing videos

There we go, I had no idea about this haha.

That’s how you explain stuff, love your channel mate.

Awesome video as always! Please make more videos about different engine types and their explanation!

Something different, I like it. Maybe Inline engines next? Like different abbreviations for different types of inline engines for example: R4, L5...

(0:00-0:15) PROLOGUE (917 Engine Display in Porsche Museum / Credits in description) What is the difference between a flat vs. boxer engine? Technically speaking, both are flat but one is a 180° V-engine and the other one is a true boxer. They have their pros and cons, but let's dive into that. (0:15-0:23) INTRO (Intro Music - Smooth by Saib (The Essenchills Volume 2 / In the description) (0:23-1:42) TOPIC Here we have two seemingly, very same engines. They are the same except a single thing which would not be obvious from outside of such an engine and could only be heard soundwise. And one thing is the crankshaft design which differentiates a boxer from a flat engine. If you look closely, you will see that a flat engine has a simpler designed crankshaft with a single crankpin but 2 opposed pistons. This would be the case of most 4, 6, any number cylinder engines, inlines or V(s). Infact, Porsche 917 or Ferrari Berlinetta Boxer used this type in their flat-12 from the 70s. It is often referred to as a 180° V12 as opposite pistons in a V12 normally share their pins. Incase of twin cylinders, they mostly use the boxer type firing order, which, on the other hand, uses split crankpins for each opposed piston, base 180° offset between the pins. It makes the 360° firing of an inline twin, which actually has 0° between the banks as a inline engine and it fires each cylinder every 360°, which means a single pin for both cylinders. You can tell the similiarity hearing the sound of a boxer twin... (1:43-1:45) BOXER TWIN (BMW R 1250 GS HP Sound [Raw Onboard] / Credits in description) (1:47-1:50) 360° STRAIGHT TWIN (Fiat Abarth 595 SS Gr. 5 Hillclimb / Credits in description) (1:51-2:43) CONCLUSION Some of the most known boxers are any Subaru's Engine, Porsche's 4, 6 & 8 cylinders, BMW's twins, or Citroën 2CV. The 180° V-engine is much more rare and is cheaper but it is where its pros end. The boxer has more crank journals to cancel out primary vibrations of the engine. It may make sense in a 12 cylinder engine but not with fewer cylinders. A flat engine generally compared to a straight or a V-engine, has the lowest center of gravity, it is wider though, has two heads, therefore more expensive to produce. One thing to mention, is that the horizontal offset of the cylinders is completely normal and present in any engine with two banks of cylinders. As the connecting rods are besides each other, so is the cylinder moved to a bit to the side. (2:43-3:03) OUTRO (Outro Music - Smooth by Saib) (The Essenchills Volume 2 / In the description) If you're reading this, let Visio know! Thank you for 3 likes. (5-10-2020 / 09:59 PST) 5 likes now. (5-10-2020 / 10:49 PST) 12 likes. (5-10-2020 / 12:21 PST) Next day, right now, it's 22 likes. (5-11-2020 / 10:17 PST) I checked it the next day, 26 likes. Thank you all for the support. (5-12-2020 / 12:07 PST) I found this almost 3 years ago, I corrected this and taking 13 minutes to rewrite this whole. [1-19-2023 / 20:20 PST] (This took me 55 minutes to do.)

Love those informative videos!

Ha thanks for this one. I'm going to make it my reference video to explain the oddness of the Testarossa engine thanks to the Lego models. There are so many people not understanding the concept of a "180° V engine"... Will even forward it to Ferrari. Even them got it wrong. I mean ... 512BB for Berlinetta *Boxer*. Well done dudes.

Thank you for bringing up the very last point you made I’ve been saying that for years one of my friends hates the boxer engine (I LOVE IT) He would always say yeah but a boxer has offset cylinders I said so does a v or flat v he never had a comeback

Perfectly explained 👍🏻

2:18 "a flat engine compared to a V engine has the lowest center of gravity." For the engine block itself, yes, but the heads must be far enough above the road to allow exhaust (or intake) routing. For a flat engine, the ENTIRE engine including the crank must therefore be that high, while for a V-, only the HEADS must be that high. I think you could probably make a 120-degree V engine with a lower center of gravity than a flat engine, because the heads could be the same height but the main part of the block and crankshaft could be a bit lower.

There are good reasons to make a twin into a true boxer, including balance and smoothness. Those hold true for 4 cylinders and mostly for 6, but once you go beyond 6, it makes more sense to go with the shared crank pin design, because it makes for a simpler cheaper lighter crank that's easier to manufacture. By the time you get to 6 pairs of cylinders, a true boxer crank is heavier and less strong, and much harder to make, and the balance issues sort themselves out anyway, so there's no real advantage to it. A true boxer 12 is going to have awful issue with twist due to torque, and torsional vibration. You'd need to take the drive from the centre of the crank, which can be done but that's one additional expense and complexity... True boxer engines are the BMW motorcycle engines and the VW Beetle. Ferrari for one, made a lot of engines they called 'Boxers' which weren't...

Another fantastic break down Visio, thanks

The irregular firing order plus the layout of the boxer is what gives this engine it's unique sound. Amazing how minor adjustments can create a big difference.

Good ol Blubbing Sound of a very big 4cyl boxer. Love it

Look into the "Knife and Fork" connecting rods of an Allison V-12, no offset in the banks of cylinders

So the 2CV is a boxer? You learn something every day. Thanks. Have a like.

It' s true that the aim is to lower center of gravity in respect to a V engine, but it isn' always achieved, because you need space also for the exhaust pipings and exhaust system under the engine.

Very nice video, all this time i thought it was the same

Your videos are better then engineering explained. Who goes on and on and on. And still makes mistakes by lacking. A real world perspective.

Did not expect to see my clips in a visioracer video 😅

I’ve seen the video of that white liberty wagon so many times, it’s a supercharged flat 6 and sounds fucking mint. Was keen on doing the same to my outback but it’s like a $20k build

When listing well known boxers you forgot to mention one of the sweetest sixes - the Honda Goldwing 1500/1800 (soon to find a home in my Hillman Imp )

Some Rolls Royce aero engines does not have any offset between the cylinders on each bank. I'm guessing the best known one is the Merlin.

I really loved the legos. Like I almost understood what you were saying in the first minute or so by watching the legos. But then you started changing images and getting very technical with lots of jargon and then I completely lost what you were talking about so I am still confused.

Oooh....... thanks for informative video 🥰🥰🥰🥰🥰🥰🤩🤩✌️✌️

I thought boxer and flat are the same thing nice video

Someone get this man a 3d printer PRONTO!

Nice instructional video. Simple and quick to explain and understand

Nice ! just a quick correction at the end : the horizontal offset is not present on every engine with two banks of cylinders : Harley davidson uses a weird type of conrod where one "forks" over the other one so they can be concentric and aligned. Not sure if every HD engine uses it though, i'm not a HD expert. It doesn't seem to serve any purpose other than it allows the cylinders to be perfectly in line, which is a disadvantage with air cooling. So it's just to look pretty i guess

Props for using Lego models. 😀

,🌠👌 Excellent moi!🌠🛩️🚗

@VisioRacer pls do a Video about Petrol Trucks, that would be awesome. Thx and stay well..🤘🏻😎 🇯🇵

Ferrari BB doesn't stand for berlinetta boxer. It is an error that was made at the car realease. BB means Brigitte Bardot, initial name of the project.

I know much less after listening to your video!

If you want a physical comparison, BEC now has a video about engines built with legos

What is ur intro song name

he realy fergot the vw beetle 💀

Did you make this video for me, because of my comment? I'm humbled. :')

what the hell is that desk cover

horizontal inline engine has low mass center too(like fiat 126 bis water cooled version) but it is too rare. Why is this ?

Flat meant to be Flattening Boxer meant to be Boxing

Oltcit Club made in Romania have a flat or boxer engine?

Can you compare a porsche flat 6 with a corvair flat 6 ?

I hope the yt subtitle not wrong

Is honda valkyrie engine flat or boxer? Or something else? 🤔🤔🤔

Alfasud/33 was also a boxer.

I hate it when people call flat engine boxers

Because it's clear that you are Well prepeared, can you make some indeeps?

Flat plain vs Cross plain I guessing.

I'll take the FLAT with fork and knife style con-rods.

If I am not mistaken Abart 595 has an I2 engine.

Wait so can you convert a flat to boxer and vice versa by changing the crankshaft ?

Its still an opposed flat engine, not matter what the crank pin orientation. No other engine feels the need to change its name, when crank pins move around or firing changes.. Boxer is just some company's made up name..

yes

There is just boxer and 180°V and they are BOTH flat engines, by opposing flat to boxer you’re just making the thing less understandable for non mechanical peoples (I’m not)

boxer 8 and 16 sound best!

A boxer engine is a boxer engine. You cannot say it's a V-180

Flat V12 - ferrari testarossa - commonly wrongly taken as boxer engine

👌

One using gloves, the other using knuckleduster...

i have an inline 8 built out of lego

Where's the subaru boxer?

Same design , different words

any subaru engine? even the EF or EK series?

interesting.

180° Flat 4 OHV Engine

What is the difference: marketing terms.

Cover photo are SUbaru H12

Wait, I think the 2cv is a flat, not a boxer Source : I'm french

I was so confused since I just came from the thimbnail, I was fully preoared and waiting for the footage to switch over the the flat-12 but it just never happend

👍

Good, but both of them are not a real boxer engines. Real boxer engine has two pistons in one cylinder, that goes in opposite directions...

Pon subtitulos please

Testarossa ^^

All i heard is turbo noise's

Crankshaft degrees are the singlemost way to change an engine's sound and characteristics.

#kartengines

BMW

Bla bla bla

I really see no difference

i have a herpes

Тайна сисек не раскрыта!