The molten hot spring spinning around and grabbing that piece mid air was amazing 4:56

What I find most impressive here is just how long that clutch is lasting under an entirely static load.

The " supercharger" cylinders used on this engine work by smoothing out the vacuum pulse generated by the engine during the intake phase of the piston travel. When the fuel in the cylinder is lit off by the spark and the piston is shoved down the first port to be exposed is the exhaust port. Venting exhaust gases rush out developing inertia that helps start vacuum generation. The piston continues its downward motion, along with inertia trying to keep gases in motion. The amount of vacuum increases rapidly until the intake port is exposed by the motion of the piston wich is now near the bottom of its stroke. This is where the supercharger bottles step in. Normally the vacuum that has developed over the piston is now pulling air/fuel mixture into the cylinder. A portion of that vacuum is routed to the carb to operate the fuel pump. Because the engine is so small and only one cylinder is used vacuum is not constant, it pulses. The vacuum pulse is routed to a diaphragm against a spring and check valve in the carb. That is how the little slobberbox carb pumps fuel from the tank. The chargers help in two ways. First it extends the amount of time that vacuum is present by acting as a vacumm resevoir. This creates a stronger fuel pump stroke pulling more fuel. Secondly, smoothing out the vacuum pulse by making air instantly available at the piston face on demand and without carrying more fuel with it. When the mixture is right the entire crankcase will be wet with fuel for lubricating purposes, so the insertion of extra air during the pulse portion of intake cycle means more power during ignition. It will have a power band effect much like a tuned exhaust does br using sound to keep burning gases in the cylinder just a little longer. Its a great idea, but in practice its hard to pull off.

you may have an award winning industrial slo-mo short film. you capture all the elements a seasoned photographer or filmmaker would. it's quite beautiful.

When you leaned in to looked at that two stroke clutch, I was expecting a piece to fly out and get you. Be careful, bro. We're born with ten fingers, but only two eyes...

The quality of these videos is astonishing

Favorite part, 4:50, where the spring screams NOOOOOO gets ejected while glowing, stretches due to centripetal force, and then gets all "wound around the axle"...so many great individual disasters coincidentally occurring there, all in just a few multi-K rpm turns of the shaft/clutch (previously) internals. I especially enjoyed the part where it said "oh no you don't", and dragged that poor chunk of escaped molten metal back in for more! Wonderful!!! Clutch haters around the world would be proud. One interesting addition would have been a strain gauge to measure the poor beast's success/failure at transmitting torque throughout this transmissive torture. I thought about going all 'turbo encabulator' here, but figured this was bad enough. The clutch in my son's Toyota, which after 300K + miles was slipping SOOO badly that he had to give up and turn around on hills (had been slipping since about 200K, but he kept insisting the engine would go at any time, even though it ran great, smoked not one bit, and was as noiseless as new, NO knocks or ticks. I finally talked him into bringing it over to change the poor clutch out. The flywheel was still in surprisingly good shape, so he WAS being careful...and I'm not kidding, it would slip prodigiously with VERY minimal throttle opening, barely above idle, at the end. The valve cover gasket was leaking so badly you could hardly find the engine for the exterior gunk, so we cleaned it all of and I replaced the gasket while he wasn't looking (literally). You should have seen under the valve cover. There was NO gunk, not even a large amount of finger scrapeable brown discoloring, still mostly aluminum colored, so he was good about oil changes. I wouldn't be at ALL surprised if it goes another 100 K. He keeps it on principle now. Other than the clutch, and getting hit sitting at a stoplight badly, which he had a guy pull out with a come-a-long so the lid would close again, he's had VERY few problems with it. Those Toyotas are (were, anyway) ridiculously well engineered, specd, and built. I will send him this link, he will enjoy it, then give me back some smart-ass and/or silly remark, at which I will laugh. He's a good "kid"...though it's obvious he's an adult by every definition given that almost all of those are around-town miles. With your propensities, I thought maybe you would enjoy that story. If he answers this, he will be quick to point out that it was HIM who finally purchased the cover gasket, which is true, at some urging (it's going to give up any time now, it's become a family comic meme). ;-) I wish I could include a picture of it, it is so sad. He makes enough to buy 20 of these a year now, considering what he paid for it used, and it was in at least b+ condition then, at about 120K miles. I'm sure everybody at his place of employment laughs every time they see it, at least when they did. Like many, he works from home now. He does CAD work, and programs a lot of support SW for that system to lighten engineer work load as well. Once the owners figured out what he was actually doing for him, they love him there.

This definitely is a great demonstration showing why you should keep your trimmer guard on your weed whacker. The guard (aside from obviously deflecting debris) actually contains a cutter blade that cuts your trimmer lines to equal and proper lengths. The length of the trimmer line while that head is spinning at full RPM's is actually your governor, and when you have MASSIVELY long trimmer lines, it's adding SO much more friction for that clutch to turn, resulting in EXTREMELY fast clutch shoe and drum wear and very often breaking the spring itself. Working at a power equipment place for nearly 8 years, I've seen so many landscapers destroy their clutches due to taking the guards off of their brand new trimmers. What's worse is all the metal dust that it sends all over the engine that cakes up onto the flywheel magnets and bearing surfaces. Literally there is no good reason to take a trimmer guard off with all that considered, let alone the massive additional stress it puts on the engine and drive components itself. This was a really neat thing to actually see happen in real footage, though!

Hey WP they're called booster bottles the concept of the is to catch unburnt gas/exhaust and force them back into the engine to be recycled and burnt off and provide more power.

that small diesel engine is making more torque than a honda civic

4:50 to 5:00 looks so awesome. The part when the spring grabbed a hold of that piece of metal and pulled it back, reminds me so much of God of War

the slow mo clutch explosion was one of the most beautiful things ive ever seen.

Awesome! Thanks Matt. In the 70's kids in Europe had usually 4 years of moped time, 50cc limited. I had a Sachs 2 gear with standard cluch and later a Piaggio Ciao with such a centrifugal cluch. On every uphill section is kept slipping. I did so many Alpine passes and worried so much about the cluch pads. But now I see them in large quad bikes and they are super reliable. Btw the Kohler was designed in Italy for the Indian rikshaw market where the terrain is steep. Kohler was an Austrian migrant to the US who saw the light to add to his bathroom empire. I found in the City of Jaisalmer near the Pakistani border the rickshaws all use this engine to nail it up the steep fort. Crap diesel makes a big stink. Diesel unlike gasoline does not disperse well so the droplets burn the nitrogen in the air that combines with sulfur and moisture to form orange smog. Nox was hard to measure and VW found out the hard way! On the other hand the US is the largest NOx producer presumably for anesthetic uses but in reality 80% somehow finds its way into motor racing. Strange how an unwanted byproduct can either pollute or even act as a catalyst to increase power.

4:46 - omg! 6:38 - these 2 tanks are "boosters" or boostbottles. Such booster helps air/fuel mixture to flow more stable through carb via rejecting pulses and fast pressure chages, therefore adds power to 2 stroke engine providing stable mixture under stable pressure on intake phase. It physically works as resonator by accumulating pressure generated by mixture inertia facing closed intake valve, and release this pressure when valve is open so it normalizes avarage pressure of intake. BUT! It's very delicate to tune such things on 2 stroke engines, it is hard to find right volumes, stiffness of bottle and lenght of hoses to achieve any significant power growth, so boostbottles are rare to see)

Damn...that clutch shouldn't had messed with family

4:58 Spring: "piece of metal, where are you going? Come here!"

Excellent demonstration of just what an amazing material our metal alloys are. The deformation in that ring was astounding! We'd never have been able to build engines without such a durable but also flexible material. Here's to centuries of metallurgists and skilled metal workers whose work makes all our tough machines go!

Diesel acts just like a big ass impact gun with how it chugs

That slow Mo is seriously one of the coolest pieces of videography.

4:58 is one of the coolest things I've even seen in my 30+ years of existing

4:57 the way a piece came back and the springs pulled it, that was cool

Always a pleasure watching things fail in slo mo 🙏🏽 Keep up the awesome content.

I felt bad for the clutch, this was more stronger than the torture in Saw movies

Perfect music; I love the slow mo as the ring becomes elastic just before the break.

I enjoyed watching this because I've never actually seen a centrifugal clutch work but now that I see it (especially the 2 stroke one) I see that it works exactly like the mechanical advance in a distributor

That first slow no was surprisingly.. beautiful lol also not how I guessed it would catastrophically fail lol

This guy deserve a Grammy award for the cool stuff he brings us :D

That one aged quite well. Glad my idea where so well received!

The "tanks" are not really superchargers, they add to the air volume of the crankcase breathing 2cycle engine, changing the power band, similar to plenum volume, and intake runner lenth in a car engine. It works with the intake pulses, reflected waves and such, I don't know how well they work, but I guess they do,

Moving 1MPH With Engine Floored Reminds Me Of Old 4 Cylinder Honda Civic Engine Going Uphill With AC On. Great Car Exept Power. Great Video.

Theres tons of channels doing this type of content yet i always find myself watching wp This guy is so easy to watch

The bottles are called boost bottles. And as someone commented, they came on a couple of YZ Yamaha motocrossers. I didn't see all the comments on it, but the ones I saw were close to what they do. The principle is, when the piston comes up to cover the intake port on a 2 stroke, it stops the airflow. The bottle allows the airflow to keep going a small amount. When the piston moves out of the way, the bottles dump their pressure. Once again, it's such a small amount that it does not constitute a supercharger. It was designed to help keep the jets and air passages operating consistently at low rpms. It's benefit was only a very small increase in low rpm torque. When airflow gets up to mid rpm or higher, the bottles have no effect. Motocrossers are such high rpm rev'ers that any gain in low rpm torque can be a premium. On the Yamaha's it was mostly beneficial to those who didn't know how to finesse the clutch. Yamaha discontinued them due to the minimal amount of extra torque you got out of them, considering that you can just clutch your way out of low speed corners.

This is super freaking cool!! Thank you for this experience kind sir 😊🤠

On my old Yamaha 2 stroke IT dirtbikes, that was called a boost bottle. They had nothing inside but somehow smoothed out the power pulses. They didn't run right without them.

Your page is extremely interesting! I honestly love your content! I have always wondered what it looks like in parts of engines when your running! You content is definitely giving me the answers I've always wondered.

this guy is like a better version of a physics teacher am learning from this guy God bless you man

That failure on the 2-stroke clutch was more likely due to work hardening around the weld rather than the weld itself causing a weak spot. You could see this in the slow mo, as the clutch housing flexed evenly across its entire circumference except for at the welded anchor point.

I would hate to get one of those glowing red springs wrapped around my arm or something. I'm glad you weren't standing too close.

The fact that the clutch lasted that long honestly I’m impressed…

People do this to rental equipment all the time. Buts it's still fun to watch thanks man!

I'm pretty sure I can see into the future in those glasses bro... That being said... these videos are F'N awesome! Keep it up!

I really want to see an see trugh 2 (cylinder head) stroke engine, I can't find it anywhere on the internet, you will be the first one, I can't wait

4:13 that is one of the most beautiful blend of colors known to man.

you looking over the engine when it had broken bits hanging off it, and was still running at 7:50 had me wincing

Could you look at the exhaust side of that two stroke engine in slow motion?

Those two bottles work by the flow of air through the carb creates a vacuum inside them as the engine revs, so when you go off the throttle, the vacuum "stored" in those two tanks sucks in excess fuel/air mix that then is ready to use when you throttle up again, so it works as a booster, as it gives less lag in your throttle response!

That clutch was badass. Im more confident in my 212 homemade motorcycle project now lol

Your footage is amazing! really blew my mind seeing this!

That diesel slowmo shot was the most badass shot in the world. That's as manly of a thumbnail you could ever find!

7 mins in he says it got my finger LMFAO I'm cracking up, u made my glass eye giggle too

The ovaling the Drum is something Truck Drivers discovered long ago when drum brakes get way too hot!

I loved this video. Very satisfying to see the metal melt and flake off and the destruction that followed. The slow motion was sweeeet!

3:58 [dramatic voice] In the bowels of the earth, an ancient mechanism forged by giants powers the eternal forge of Cent'Rifukal, the hidden race that mines iron under the crust of our world.

“That was painful I almost cried”😂

The slow motion footage was SO tasty, like the very best of big budget cinematic trailers. Wow!

Thanks for the video. Its interesting on seeing the clutch in action with the slow speed.

Next video idea See through transmission without oil/ shift without clutch

I've known about these clutches since I was a kid but I never realized how durable they really were

I've never seen a N/A diesel or 2JZ engine that impressed me.

Thanks this really helped me understand how a centrifugal clutch works

that screw on the second engine was just like "nope, im not going to be a part of this"

"welcome to my channel where safety is #1 priority"

ahaha how amazing! first I looked up how do LCDs work, found your video, next looked up centrifugal clutch, and you got a video on it! and thats why I just subbed and liked both videos! great work!

3:56 there is something beautiful about that slow-mo with red hot metal and mechanics running at the same time.

Great video for my kids and I to watch, especially right after we destroyed a clutch (not intentionally) on a go kart I purchased 2 weeks ago. The go kart had been sitting out in the open, unused, through hot summers, rain, and two winters, so the bushing was probably rusted. Plus it was really wobbly on the shaft. But after it exploded, I was able to teach a show the kids how the clutch works. Thanks for the video. One more thing, please tell me you didn't lose your middle finger giving someone the bird.

I'm not going to lie dude this would be a cool ass background on a computer or something. The slowmo is amazing on this :)

HOLLY COW that first one where the bell housing came off was freeking awesome man. Yet another brilliant video

Thanks for the vid, I now understand something that had been puzzling me for some time.

UKposts: "hey, do you want to watch some disk melting" Me: "nah" Also me: *click it anyway

This was pretty cooln never knew a clutch like that existed actually, kinda a genius invention for small racers like that go-cart. 2jz engines are not known for making good power stock, (they make like 180), but theyre known for their strength, that block can take a massive beating without blowing up thats how people get 1k horses out of them.

One of the best slow motion ever!!👍👍👍

You are a wonderful person! Thank you for all this great effort buddy such an enlightenment❤️

those tanks are called boostbottle. When implemented like this, they areuseless or even harmful. it gives more space after the carb(butterfly valve), and is suppose to resonate with the frequency of the engine and make the air/fuel mixture stay behind the valve.HOWEVER, this needs to be tuned to the engine and the carb. simplly add a random length of tubing with a random volume of tank, doesn't do anything, and may even hurt the performance. From you slow mo, it can clearly be seen that fuel is still spuing out of carb into the air intake side of the carb,which means the boost bottle is useless or even harmful

tanks are IMPULSE tanks.. they are resonance chambers that capture and release pressure waves to tune the intake to a specific "powerband" RPM. the intake charge gets moving towards the crank, the ports close and the pressure has nowhere to go, instead of slamming into a dead end (wasting energy) it goes into the tanks. Perfectly timed reflection of the impulse comes out of the tanks at the same time the ports open , ramming the pressure into the cylinder. i belive you can tune the engine by shortening/lengthening the pvc pipes.

Love your videos and explanations. I always get to learn something new.

So glad I subbed to this channel. Appreciate the content.

That's some quality content, You deserve 10 million subscribers 🔥

I was thinking you'd show the mechanism move in and out as the motor speed changed. It would be even better with a strobe so it looks motionless.

Just found this channel and I've been binge watching. Love the videos keep it up.

@4:57 I love how the spring comes back around and whips on one of the clutch shoes back in like Scorpion form Mortal Kombat. "GET OVER HERE!!!"

6:45 those two metal bottles are called "boost bottles" they connect to the intake manifold and basically increases the pressure of the fuel/air going into the engine creating more power

I shared this video to my professor and this is what he replied, "Imagine the amount of heat generated that the chromium steel clutch shoe gets red hot and 5160 spring steel gets molten, at least 2500°C. Just don't replicate it yourself if you value your life at all."

Seeing the mill scale start flaking is awesome

pretty awesome footage man. Been looking at your videos trying to think what i want to see

no one is gonna talk about how beautiful the high speed camera footage looks? it looks fantastic in my opinion, almost fake

7:10 subtitles: [LOUD music] Me: pleasant sounds to my ears lol

That was one of the coolest things i ever seen. Good work sir 👍🏾

Imma use that clip as my screensaver. what a great shot!

The two tanks are "boost bottles" as others have said. Their effectiveness is questionable but the idea is that, in a piston ported engine like this, when the piston skirt closes off the intake there's a flow of air through the carb that gets stopped. That flow has momentum. The boost bottles give the flow of air somewhere to go (into the bottles). As the piston goes back up and opens the intake up again the air that flowed into the boost bottles should be getting released back into the intake to be fed into the engine. Essentially they're supposed to help increase the volumetric efficiency of the engine a bit. There's a formula to how they should be sized to get the resonance right. I don't think there's any solid evidence they have more than a negligible effect on power.

7:55 - Maybe not the best idea to look that closely while it's still spinning, in case the spring detaches and flies into your face!

aside from these..you made some great opening vfx from that burning-clutch part. looks CGI-ish..awesome

Trying to tell someone that things like this happen but they visually can't see it/ picture it in their own head. It's nice to see your videos showing it.

*You can press space bar right before it explodes then press < and > to see frame by frame it exploding*

these tanks are used when you let go of the throttle and go back on it again, helps you get more instant response, usually helps with torque, many street legal 2 stroke bikes have one, they always connect AFTER the carb and will store gas and 2 stroke oil mix

Gracias por los subtitulos a Español! Me encanta tu contenido y aun mas si lo puedo entender, un saludo desde Mexico👐

I like how that one orange hot spring snags around the clutch piece at 4:56 and pulls it back in like "Get over here!"

Now thats a thumbnail 👍

The "super charger" is compressed air and pushes more air in to the engine to make it go faster

Great Video! Extremely entertaining and very informative! Great job!

This looked amazing during run,and during failure.