14:45 time is a false measurement here. It would be better to operate with a angle*momentum sum across the combustion stage. Here the difference in top dead points is kicking in: making the momentum more linear, normalizing piston speed, increasing fuel burning duration thus allowing fuel to burn completely.

Balance issue is not an issue actually. Vankel engine has same offset geometry, and solves the problem with excentric geometry of the crankshaft

That is interesting and makes sense as it's making more out of what it's given eg the time, so I'm thinking with different compression stroke,less time, would it be better for boosted engines be that supercharged or turbo

I love that you made this video. This is such a great lesson on engineering. Sometimes what may initially seem weird or counterintuitive identifies an aspect that can lead to creative gains.

I wonder if alternately offsetting the pitons would help the balance. You might need to have a different firing order and inlet and exhaust valves also on alternating sides. I am too tired to get my head around it at the moment, but I might think about it when a bit fresher.Great explanation, thanks.

I think you'd like Hexibase. UKposts him!

Amen

Nah, I think he should keep showing cascading stacks of hundred-dollar bills, and show fake film projector scratches, as though it is old footage, and he should add a fake A.I. "narrator" who can't pronounce words, names, or numbers right. And some crappy music. :) BTW I never knew this about engines, even though I run engines all the time and know a few good mechanics. Very interesting stuff!

This means that it also has a lower rpm limit, 1000 rpm on a diesel would be equivalent to 1.5k rpm on a gas engine, they move at the same speed.

Is this guy talking about Chrysler's 1959 slant 6? For all you "this changes everything" modern day idealists... please keep in mind quad copter drones were invented in the 1920's, and were among the first successful heavier-than-air flight "VTOL" vehicles preceding helicopters, and electric cars were around from the very begining of personal trasportation. With the first example of an electric car in 1830, but by 1900 were 38% of Americas automobile market, with steam taking 40%, gasoline 22%, and diesel just recently invented in 1893 as a means to use cheaper low grade fuels. Diesel is only more expensive because the government puts a TAX on diesel fuel, and now also requires DEF as well.... I'm still waiting for someone to re-introduce steam vehicles, so this guy can make a video about how THIS CHANGES EVERYTHING.

​@@Ed-ty1kr Starting in 2007 here in the USA the feds mandated "ultralw sulphur" diesel fuel, among other emissions reduction devices and systems. (Think DEF, DPF, along with some other ideas integrated into these new systems). It's unfortunate how technology has improved dramatically in the diesel industry just to be negated by the over the top emissions reduction systems mandated by the fed. In 2007 they essentially raised the price of diesel per unit, gallon here in the states, which of course became a permanent raise in cost, supposedly to offset the cost in the manufacturing and distribution of the required ultra low sulphur fuel...all the while achieving this new standard of reduced sulphur by simply taking said substance out of the "mix"...in other words charging us significantly more per unit of fuel by the reduction or even elimination of a key component which in the past was used to lubricate the moving parts of the fuel system itself. Well not just moving parts but also critical yet stationary parts like the body itself of a diesel fuel injector. This whole concept of what went down here in America around 2007 is so frustrating to me. As a life long mechanic with experience in internal combustion gasoline, compression ignition diesel, 2 and 4 stroke gas, and even electrical (EV) powered vehicles found in the forklift and equipment fields. In addition to the wrenching experience and understanding I also worked a relatively small window of time in the refinery business around this time of 2007. Much work was needed for the refineries to be "ready" to make, distribute and sell this new "ultra low sulphur" fuel and therefore refineries everywhere went under humongous updating projects. Many bodies and brains were needed for this task. I hired in at the Marathon refinery as a contractor at their elaborate plant here in Detroit, basically i-75 and Fort st./Schaeffer Rd, near outer drive amd Dix Ave...anyone from around the knows the plant and it's location. I found that job very interesting, despite being temporary I still spent about 2 years on site learning something new every day about the refinery process, which honestly, was rather rewarding. In summary, it's almost as if some kind of globalist cabal who secretly run things from behind closed doors and it's almost as if these people didn't want more efficient diesel engines which essentially move and power this entire world we live in, where every aspect of our daily lives are affected by a diesel powered something somewhere along the way. All these EPA backed emissions reduction acts and mandates have crippled the Diesel engine industry to where people actually believe EV's could save the entire world right now...which they cannot. Ever. Efficiently. Replace ice and diesel. In a dream last night I actually imagined the newest most bestest thing ever...a vehicle powered by... Coal! Then I woke up and had to pee.

@@williamstamper442 EPA and DOT measures became overreaching sometime around 1969, with 5mph bumpers that by the early 1970 made American muscle cars sinfully ugly, with huge protruding bumpers, and emission systems that dropped 350 to 426 horsepower cars down to slow, heavy, and gutless 150 hp gas guzzlers. But this actually goes back to 1913 and Woodrow Wilsons Jackyl Island treason, that the British Royalty literally paraded him through London for. Henry Ford was quoted as saying its just as well the American people are ignorant to finance, cause if they knew, there would be a revolution by morning. Not an exact quote but something to thar effect. Which got really bad around 1964, post Kennedys famous secret societies and proceedings speech, which was just weeks prior to his assasination. Funny thing you mention Globalists cause it was with George H.W. Bush involvment, a known and admitted Globalist within the CIA, who later became Regans VP as Regans alzheimer's set in. Then became President giving the world his famous New World Order speech, with creepy undertones saying things like "and when we are successful, and we will be". Followed by a short Clinton break, with MK Ultra and Tuskegee human experimentation on American citizens admittal and lame appology, and then by his son and fellow Bonesman" George W. Bush Jr. There is a documentary you can still watch on Internet Archive made in 1982 called The Killing of America, that although is aimed at gun control, still documents the drastic decline of American society into violence, mass redrum and general crime up to that point in 1982. Directly links Kennedys assasination with the crime rate, violence, and general depravity as if some great evil had decended upon the land. Which only got worse thanks to the CIAs Contra Cocaine "conspiracy" and introduction of crack cocaine onto Americas streets, only now trumped by fentanyl. Which... started with LSD's introduction, the first poison unleashed on the nation. And who created that? Look it up, it was nothing new, it was as if it was deliberately released onto the soft heads of Americas youth, by design, on a large scale, and almost immidiately in the late 60s post assasination like clockwork. So now its fentanyl but its the same game, new millenium. Look into a book called The Psychopath Machine, written by an MK Ultra survivor, who claims MK Ultra was not to create psychopaths, but to identify and install psychopathy in prominent positions. By identifying through tests and examinations all existing sociopathic personalities, so as to find candidates for the military industrial complex bureaucracy, top medical professionals and doctors, university psychologysts, federal judges, top law enforcement professionals, and the now famous Wall Street American Psycho business personelle. Everyone thinks MK Ultra was to create psychos, but why create something if you can recruit existing? Anyhow... As far as Globalism the world we see today is a direct product of their actions. Just look up the definition of GLOBALISM and see if that fits the world we live in. Look up World Economic Forum videos and whitepapers, they dont hide much, for they assume we are all just ignoranr commoners. I still recall Ross Perots "Great Sucking Sound" speech he gave with Geroge Bush Sr. on his right, and Bill Clinton on his left, as he told the nation we will see our jobs sent to Mexico and overseas if we elect either one of those two candidates. Thar was 1992, and Boy was he right, they literally sent all Americas industry... tooling included.. to Mexico and mostly to China, because the "Chicoms", view communist China as the model for their New World Order or Great Reset. Where they can Build Back Better their tyrannical dystopia where you own nothing, live in 15 minute prison cities, have no privacy whatsoever, and eat a diet of bugs. But only after they tear it all down and bring the western world to its knees, cause you must tear it down to build it back. Looking further down the now well proven and documented rabbit hole we see the same mass migration mentioned in Globalisms definition, in both Europe and the United States, with the 3rd definition for globalism given as : An ideology based on the belief that people, goods and information ought to be able to cross national borders unfettered. So we see our boarders disolved or non-existant, with our military or "defense" spread out to hundreds of bases world wide, and fighting or aiding in just about every conflict anywhere including Ukraine. Which was a military industrial complex and George Soros color revolution construct, designed to fight Putins refusal to play along with NATO's clear rejection of the treaty written up by Gorbachev while the Soviet Union was disolving, not to impose NATO onto Russias doorstep. People dont know about any of that, and how can you blame them they dont work at the United Nations, so they support whatever the media tells them. But it was actually over a treaty that was not upheld by NATO, and the nordstream pipeline that has most of Europe now feezing to death. They did it by first meddling in their already fraudulent elections, playing dirty games with Ukrainian oligarchs who are actually just the corrupt businessmen and gangsters that came out of an empires collapse. They got involved with installing of puppets like Zelensky, possibly even Putin himself for all we know, and subverting their society through color revolutions that are always signified by the famous RAISED FIST. Running criminal bribery based public private partnerships which is basically just a soft modern term for fascism, first coined by Mussolinni the italian dictator during WW2. This tactic then was turned inward onto the American people in 2020, and we ended up with cities burning, and public private partnerships set up during the Bush era that is now no longer just working for the government as contractors, but now controlled the government through public private partnerships. Anyway it is FASCISM, its set up and ran by Globalist wealthy self declared elite stakeholders, and it is just a means to impose a world government tax on the common people ONLY, while they continue to jet set and yacht around the globe in vehicles the DO NOT ACCRUE CARBON CREDITS... Yes you read that correctly, private jets as well as vessels above a certain size do not have to abide by carbon credit global government taxation. They solve nothing, they impose all these measures like forced injections and central bank digital currencies linked to social credit scores... but they serve absolutely nothing except to make them richer and more powerful. It is an ideology of haves and have nots, of serfdome, a cass system, a communist fascist socialist dystopia where your only rites are to depopulate yourself by assisted suicide, with their war on carbon being a war on all of us carbon based life forms. Sorry for typos, and sorry for it being so long, I couod write a book on the globalist tyrannical nightmare society they are building. And yes , they penetrate the cabinets as Klaus Schwab says, and destroy whatever they lay their greedy, grubby, filthy paws on. Period

@@williamstamper442 LOL ... I got a good example of Globalism for you Will... Nevermind these wasteful batteries that lose God knows how much energy being tranfered down sometimes hundreds of miles of power lines, with losses through resistance clearly shown by simply looking at them through a thermal camera.. But can you explain to me how does this Gloablist process make any sense to you? They source cod or chicken or whatever perishable refrigirated commodity here in the United States... only to ship it to China to be sliced up and packaged. Then ship it BACK to the U.S. to be placed in supermarkets. Is that globalism in a nutshell or what?

Offset cylinder is called desax

Big facts 💯👆 very well said

if this is ALMOST nerdy to You, im scared to ask what is really really nerdy XD

@@jesusfreakpl I'm currently watching a live stream of two astrophycisists debating a scientific paper discussing the nature of a particular, albeit peculiar asteroid; that is full nerdy by my standards

@@jaybruce593 please tell me Neil D Tyson is not one of them 😩

@@jaedanoeugene4004 Don't worry, it was Avi Loeb and Bian Keating, discussing Oumuamua. I like Neil De Grass Tyson, but nearly everything he does these days has his side kick "chuck" who always derail the science to make dumb jokes, or the conversation gets dumbed down to a point where he, as a non scientist can follow it.

Cranks get modified for offset grinds to increase stroke. Machine shops have been doing it for decades.

​@@johnhendel7357exactly my dad and I talked about this years ago. his best friend was an engine machinist at the time.

There are two ways to apply offset. You can either "move" the crankshaft off the centre line of the cylinder or you incline the cylinder slightly. The effect is the same. This has been done for at least 80 years to my certain knowledge. In the 1950's it was normal to rebore an engine after as little as 25,000 miles. This was done with the block in situ. If you didnt allow for the offset when setting up the borer you destroyed the block. Later the cylinder was offset laterally to make maintenance easier. This information is hidden in works maintenance and overhauling manuals.

Thank you for sharing your knowlegde ❤@@davidh3486

GM in particular, but all the big three have been using offset wrist pin placement for well over the past 50+ years in everyday production. Most of this was to reduce piston slap, thrust wear on piston skirt when cold and in general quiet the engines down. With that said they also had slight increases in torque in mind, across the board at relatively low rpm levels seen in our daily transportation still to this day. "free" torque improvements are an increase in efficiency and we all like the way that sounds. Unfortunately the way the oems have done offset wrist pins in order to quiet down cold starts and such ended up cancelling each other as one bank on a V8 would be offset in favor for small increases in efficiency, but the other bank on a V8 were offset to just take the load off the thrust side of piston skirt with a net negative effect on efficiency. That's what I meant by any gains were cancelled out on the other side of the engine. They still achieved their goal of reduced engine noise however

Nascar engines were allready using it acording to articles written by smoky unick it dose decrease piston and cylinder life to a degree

Ever heard of David Vizard? He has a channel and is essentially an engine-building legend. He also donates to St. Jude"s. He offset an engine's bores what I'd guess was decades ago.

I am as you and agree.

Changes everything, I bet it won't change the colour of my car.

If you're an engineer, you surely realize the offset engine has a longer rod or longer rod bearing distance from crank center to do this. They are not the same as the centerline rotating engine. This is part of where the "increased intake gas" comes from. That point was completely skipped over, intentionally I suspect.

Most certainly agree !

To achieve that you need a "teacher" with an intimate understanding of the subject to begin with.

True. Thanks man.

@@MrCanonballs And, of course, students with a keen interest and willingness to engage and learn.

thank you one more super good video but i did,t undurstant how they finale balans out the engine ? ? ?

Idk what school y’all go to but they teach that stuff in my school

Hi sir im a big fan of yours i always watch your videos and i realy love it, im a racing mechanic i do upgrades with bigger cc and defferent engine configurations i hope that you recognize me sir

Hello

engine knock-on

Great point you have made, about applying some of this science to a common bicycle. As a mechanic, car guy, drag racer and all those dirty things I still love my bicycles too. Now you got my brain smoking overtime as these principles are applied to our pedal powered all capable machines!

I uses to race bmx also Jack pine lodge , in bath mi. 1979 , 1980 ( i think ) I showed up with a hacked up huffy street bike , that i cut the crank and lengthened the pedal stroke , if you werent careful you could stub your tow and twist them backwards , i had it that long , But it worked great , i was out in front most of the time , that area at that time hadnt seen much experimenting like that , but it caught on quick , and i picked up shwinn in east lansing as a sponser , got me a fancy schwinn mongoose , they just came out back then ..

This video reminded me of the Shimano “Biopace” chainrings in the early-mid 80’s designed to take advantage of that bicycle pedal stroke.

I was imagining these concepts in my head

Okay, cool. So could a small block Chevy, for example, be improved in power output by forging pistons with a crank pin hole drilled a few thousanths offset? (Obviously keeping it small enough to avoid destructive vibrations) Is this being done, say in the drag cars? Is there an emerging cottage industry? Seems a manufacturer could take advantage of this without an entire redesign. Is the old Rambler 6 in my Jeep good for another 8 hp? I’ll keep it under 10,000 rpm, promise!

​@@russbell6418 just spin the pistons. They already have a little offset. It will be noisier and vibrate more though

Loss of stroke but also loss of resistance to push the crank twelve to twelve o one

Don’t even start about what the other cylinders are doing to change all the math.

All I can say is "Every thing is simple, we only make things simple complicated.

I know right, I stopped browsing auto-trader at cars I’m never going to buy to watch this.

​@GTRT-KiloWatts aaaaaaaaaa❤❤❤❤qqqqqqqqqq

So did I 😂

Me tooo! So much more relaxing!

Same. Lol

@Matthew Helton Reading your comment made me really smile. Back in 1972 when I was doing my final work (diploma) for my degree in Mechanical Engineering (Lucerne, Switzerland) one of my student fellows was given an assignment by the Head of the Engineering Department at SULZER Switzerland (back then famous for ship diesel engines powering big oil tankers and freight ships). The task was a principle study of a variable offset diesel engine and to investigate what advantages and consequences could be expected from such a design. Since I had completed my task a week early and was bored, I suggested to my colleague that I would write a FORTRAN program to calculate the friction losses over the four cycles as a function of the variable offset. The result was a surprise for both my professor and the expert from SULZER. By the way, even then we had something more than just slide rulers and sine and cosine tables, namely an IBM 1130 with 20K main memory and a 5 MB disk. Nowadays, most people are surprised that you even could do anything with it at all.😀 Kind regards Florian Eggenberger

I'm curious how this technology could be applied to stationary steam engines. The steam engines I'm familiar with have a power stroke in each direction because they admit steam to a piston face at both ends of the stroke. Could you point me in the direction of an example I could examine?

My car gets 55 mpg at 2000cc 😎

​@@TheSuperBoyProject what çar is that exactly?

On paper it got good mileage but it has a very narrow torque curve and was coupled to a gear box with very high ratios. Also built like a lawnmower engine making extensive use of pressure die cast parts.

I noticed the 'suped-up' engine mount/damper at 19:25 I thought who would just build the engine and counter the vibration issues during fittment of said engine? Well thanks Henry Rolt, Toyota did! In this day and age I think, given the option, most consumer car buyers would opt for extra mpg over a smoother ride. In fact, if a car returned 125mpg but rattled your fillings out, it would sell like hot-cakes and come witha free gumshield!

Fiat 850 from the '60s in the first one I ever worked on.

I agree. Very good work explaining complicated thought processes while all the time keeping us engaged, well done!

Great, thank you for the fantastic explanation. As you say, it’s all compromise and the engine concept depends what you want in the end. I guess the off-set engine is good for racing, the zero-offset good for keeping your teeth and spine in good condition for longer drives/rides. 😊

Off the top of my head, what I remember from a V12 is that it can be built such that it is perfectly self-balancing, without balancing shafts.

Regarding balancing V12s are often inherently balanced through any V angle because they can be arranged as 2 inline 6's merged together, and the inline 6 is intrinsically balanced using the right firing sequence.

​@@peterjohnson9438 yeah, but why? V12 is always said to be balanced but people who say it does not explain why in any appreciable detail.

He already did a video on the R1 engine: ukposts.info/have/v-deo/rX1erZl_im-m16s.html

If you're talking about the modern crossplane R1 there is lots out there about its inner workings, Not so sure about the ZX10 however

I'm interested what you meant by "not much interest in ICE." Did you mean you were interested in cars but only electric ones?

@@jaredlancaster4137 Perhaps like me, I took ICE for granted. I use them, wasn't really curious about them. I'm interested in electric motors, but for industrial applications, not cars!

Did Ford stop applying offset on their V8s?

Yeah thats also what im wondering. Also did chrysler/gm do same offset thing during 50s and 60s?

The Moto Guzzi postwar Falcon 500 singles were Desaxe designs, I always wondered why. Now I know! Great video.

Yamaha has the offset too but it's in the piston!

Some of these engines suffered from assymetric wear, and were harder to overhaul, and had shorter working lives.

😂

I think only really old engines have non-offset pins. The pin was offset on every engine I ever seen taken apart. The reason is primarily to reduce bearing loads and make sure the rod is already a bit angled at TDC to eliminate the possibility of rotating the engine in the other direction.

@@d4a As i recall what i once was learnt at school (flight mechanic) many yers ago the primary reason was to reduce the side force acting on the piston against the cylinder wall, to reducing friction. And also it´s nice to have the engine not kicking back on you when you starting it by rotating the prop by hand.

Steam engines used offset engines over 100 years ago, and the Volkswagen vr6 and vr5 are off set, but instead of offsetting the crank, they would offset the angle of the cylinder bore.

​@@klubstompersI guess I could sleeve my engine then bore the cylinders off center.

@@wannabecarguy Yea, you'd only have to that and mill the block top at and angle, fill all oil and coolant passages the angle interferes with in the block, re-drill new ones, custom crank balanced for the rod angle, custom harmonic balancer, run a custom timing chain system or belt, custom header or down pipe to accommodate angle, all for zero HP gains. Cake!! :D

The offset usually ranges between 4mm to 10mm, too large leads to diminishing gains. But there are engines with as much as 12.5 and as little as 2.5 agaik. Offset in the video is exaggerated to 15mm to make effects more obvious.

@@d4a hi, is the suggestion that 7 mm offset is an average? or is the optimal offset based on the stroke/ rod ratio?

​@@d4a I'm probably misunderstanding but if the offset decreases the rod angle and therefore the friction on one side of the cylinder wouldn't the increased rod angle while it's on the other side cause increased friction, negating the benefit?

@@dr.brianadams6542 the highest side load is during the combustion stroke. The difference is not small either. Go back to the vid on Miller, Otto and Atkinson cycle engines for another benefits.

probably, the only non-bot comment. thanks for this comment.. I was thinking this would only be beneficial for a 2-stroke engine. The compression stage of a 4-stroke would completely destroy the presenter's efficiency paradigm.

@@derrikarenal3308 Think about how much greater the forces are in the power stroke. After all, that one stroke produces enough energy to get the engine through the other 3 strokes and on top of that produce a huge amount of energy to accelerate the car. So making the geometry better for the power stroke, easily offsets the penalty of making the geometry worse in the compression stroke. (Where the downward & thus sideways forces on the piston are maybe in the order of ten times lower).

Like answering questions I didn't know enough to be able to ask...

We're all ordinary mortals ☺️

@@d4a maybe you are, but thanks to denial I'm immortal.

Piston offset is something entirely different than offset rods. Piston offset is there since the Ice Age. It' s goal is to slightly increase piston dwell time at top dead centre thus decreasing piston slap (a ringing sound) and decreasing load on the wrist pins and small end of the rod. Same is achieved with offset rods, but that is only one aspect of offset rods.

puerco, opuestos no es boxer paul, i get what u say bout offset rod but piston ofset ain't know wy t wld b diffrnt

@@Xayuap with offset piston the piston rod and crankshaft are still inline

t ain't dat w r xplainn n d vid?

Hello John how are you doing 😊

im sure being a 500 lbs lighter than the camaro and 900+lbs lighter than the GTX played a small contributing role as well : )

However, the compression and exhaust strokes are relatively low-stress periods in which the force on the piston is small, compared to the power stroke which has a very high force on the piston. Thus it gains more to reduce the friction coefficient on the power stroke than it loses to increase it on the others.

I'm not an engine nerd, but that aspect bothered me.

Yes, and no... at low RPM the friction from the power stroke goes way beyond the friction generated by inertial forces. But as the engine RPM rises the inertial-induced friction increases while the power-induced friction stays relatively the same.

@@saskprotogencyus2788 What you described happens to nearly the same extent in a non offset crank arrangement

@saskprotogencyus2788 exhaust is no problem as the force on the piston is relativ small. Compression is more annoying. What is a problem is bottom dead center. Once the crankshaft get's past 180° and starts moving up, but the piston still moves to his buttom dead center the pressure on the piston works against the engine. You can compensate this with valve timing but it will remain more prone then a no offset engine.

Thank you for watching ❤️