Why It's Almost Impossible For An Engine To Rev Over 20,000 RPM

Подписаться 9 млн

Просмотров 2,1 млн

50% 1

Thanks to Keeps for sponsoring this video! Head to keeps.com/b2b to get 50% off your first order of hair loss treatment.
The average RPM range of our boring consumer cars, or heck, even our more performance fueled cars are sub 10,000 rpm. So how does F1 make an engine that revs to 20,000 RPM? And why would they want to? What does a higher revving engine mean for performance?
HERE IN MY GARAGE…
Curious what we use in the shop on a daily basis? Check it out below. And if you purchase these tools from these links, you’re helping support Donut. We appreciate it!
Milwaukee Electric Tools 2550-20 M12 Rivet Tool (Bare Tool) www.amazon.com/gp/product/B07...
Milwaukee - 48-22-0125G - 25 ft. Magnetic Tape Measure - 2-Pack
www.amazon.com/gp/product/B08...
Milwaukee 48-59-1880 M18 REDLITHIUM HIGH OUTPUT XC 8 Ah Lithium-Ion Battery and M18 /M12 Charger Kit
www.amazon.com/gp/product/B07...
Milwaukee Angle Grinding 2781-22 M18 Fuel 4-1/2"/5" Slide, Kit
www.amazon.com/gp/product/B00...
Milwaukee 2735-20 18V Li-Ion Flashlight
www.amazon.com/Milwaukee-2735...
Milwaukee 2557-20 M12 Fuel 3/8" Ratchet
www.amazon.com/gp/product/B07...
Milwaukee 48-11-1880 M18 REDLITHIUM HIGH OUTPUT 18v 8.0 Ah Lithium-Ion Battery Pack
www.amazon.com/gp/product/B07...
Milwaukee 2125-21XC M12 LED Underhood Light Kit
www.amazon.com/gp/product/B07...
Milwaukee M18 FUEL 3/8" Compact Impact Wrench with Friction Ring
www.amazon.com/Milwaukee-Comp...
Adenna Dark Light 9 mil Nitrile Powder Free Exam Gloves (Black), Large - Box of 100 (DLG676)
www.amazon.com/Adenna-Light-N...
Scott Shop Towels Original (75143), Blue, 55 Sheets / Standard Roll, 30 Rolls / Case (10 Bundles of 3 Rolls), 1,650 Towels / Case
www.amazon.com/Scott-Original...
Zep Cherry Bomb Industrial Pumice Hand Cleaner - 48 Ounce (Case of 4) ZUCBHC48CA
www.amazon.com/Zep-Cherry-Cle...
AIDEA Microfiber Cleaning Cloths-100PK
www.amazon.com/AIDEA-Microfib...
Barrow 52 in. Brown Large Rectangle Wood Coffee Table with Lift Top
homedepot.sjv.io/c/2095194/45...
Barrow 52 in. Brown Large Rectangle Wood Coffee Table with Lift Top
homedepot.sjv.io/c/2095194/45...
New to the Channel?
►Watch this: • POPULAR DONUT VIDEOS
We upload almost every day, subscribe so you don't miss out!
►Subscribe here: bit.ly/1JQ3qvO
Click here for more info on joining the Donut Underground!
► / @donut
Shop Donut Merch:
►www.donut.media/
Donut Media is at the center of digital media for the next generation of automotive and motorsports enthusiasts. We are drivers, drifters, and car enthusiasts who love to tell stories.

Авто/Мото

Опубликовано:

9 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 4,4 тыс.

@carhawara3394 3 года назад

"Isnt limited by physics, but rather by mother nature!" These are sentences that Start riots at technical universities

@esh92 3 года назад

yeah that was a dumb sentence

@BunnyBUNGALO 3 года назад

You're not understanding the context. In that video they showed it would be more than possible to break the world land speed record if there was enough space, but there isn't enough space on the planet to break it. Thats why.

@jaykoerner 3 года назад

@@BunnyBUNGALO how is that not related to physics.... Literally anything could be attributed to physics,

@MX26_ 3 года назад

@@jaykoerner It is, and in a way it's caused by physics, but physics would allow for more top speed if we had a long enough stretch of straight road. Still a bit of a silly thing to say, but it kinda makes sense.

@thomasrogers8239 3 года назад

Had the same feelings and thoughts.

@lucasaal61 3 года назад

"its impossible to an engine to go over 20k rpms" -My dads fiat engine when i used to miss shift at 120km/h "No, it ain't"

@TheTyisawesome 3 года назад

☠️☠️

@elweewutroone 3 года назад

💰 💴 💵 shift

@shenaniganshop3309 3 года назад

😂😂😂

@oscardbg9654 3 года назад

As far as i remember, f1 engines used to run at almost 20k rpm...

@Stand_Tall 3 года назад

@@oscardbg9654 think they were limited at about 18 000 rpm

@inniyewtesfaw2003 3 года назад

"impossible to rev over 20,000 rpm" that one Honda at 2am: watch me

@eric97909 3 года назад

Or rather, Listen to me

@ValentineC137 3 года назад

@@eric97909 you say that like we'd have a choice in the conversation

@ellogovna8329 3 года назад

have anyone heard of a super bike that can reach 52,000rpm? its called the MTT Y2K.

@ellogovna8329 3 года назад

it powered by a turbine from marine turbo technologies

@ellogovna8329 3 года назад

it can also outrun a veyron in a drag race

@eriklona8806 3 года назад

F1 engine's stroke is just above 2 inches. 😏 I had a feeling we had a lot in common

@KayJblue 2 года назад

3:18

@the_icon_of_sin_94 2 года назад

Same

@superior6564 2 года назад

"I have a small dick" 😂 "LOSER!" "I have a big dick" 😂 "LOSER!"

@boywithoutsoul587 2 года назад

Well you don't drive F1 cars on streets and most of these females are made for the street.

@eamador83 Год назад

I’m dying 😂

@The_Mup 3 года назад

"This week on money pit, we're gonna put koenigsegg's freevalve system on our miata!"

@wowgodiamond 3 года назад

"super expensive" The guy said he installed it on his Miata engine for less than the cost of a nice exhaust. Sounds pretty cheap to me for the installation of Free-valve technology.

@nszngaming9372 3 года назад

Yess lmao

@JosephRedfern 3 года назад

(For anyone wondering: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-E9KJ_f7REGw.html)

@Grumpy_old_Boot 3 года назад

He forgot one big problem of high engine RPM ... lubrication ! Once the pistons exceed the speed that the oil film can hold itself together, the film "breaks", and then there's no lubrication. Once you have metal-on-metal movement, friction rises drastically, producing insane amounts of heat. And if it gets bad enough, it can fuse/weld the piston to the cylinder ! And then everything explodes !

@waynewhite2314 2 года назад

exactly...I think above 600feet/min with hydrocarbon oils

@Grumpy_old_Boot 2 года назад

@@waynewhite2314 Add another zero, and you're in the ballpark of most modern sports cars. But yeah, new oils are better at high piston speeds. 😀

@waynewhite2314 2 года назад

@@Grumpy_old_Boot yeah I think it feet per second...my bad

@Grumpy_old_Boot 2 года назад

@@waynewhite2314 No problem, it's all good. 😀

@tiagofigueiredo2529 2 года назад

Honda rc115 says hiii 👍

@mr.levintouge154 3 года назад

Bunta: "Be sure to rev it up to 11,000rpm Don't lose."

@willthethrill2078 3 года назад

Noticed you senpai

@jrojassengard2586 2 года назад

Takumi: what's a '86?

@ThisIsCexary Год назад

What color is your 86?

@scenicdepictionsofchicagolife 3 года назад

I feel like nobody remembers about Desmodromic valves. They are the literally unaffected by valve float as the opening AND closing are mechanically controlled! :D

@zorktxandnand3774 2 года назад

Well they constrain the valve position by not only opening the valve by a cam, but also use a cam to close the valve in stead of a spring, thereby not allowing any valve float. Only problem is that the load on the closing cam increases with RPM, while it reduces on the spring. I don't think a Desmo could go as high as 20K Also it turned out the valve float they tried to fix was not so much a problem of RPM, but more of valve spring oscillation. This is more easily fixed by using 2 or 3 smaller valve springs (with different resonant frequency's) in stead of 1 big spring.

@davelowets Год назад

Desmo valves are NOT the answer

@additin7470 3 года назад

Mom: *money shifts my Miata* Cylinder 4: “20k RPM? That’s easy!” Air Force One: “Something just hit the tail of the plane....”

@ahmedneamah7836 3 года назад

Hahaha cheeky

@Thri11seeker 3 года назад

Lmao

@heygek2769 3 года назад

Rodney!

@fbi3544 3 года назад

Rotary: *Am I A JOKE TO YOU?!*

@imluna6455 3 года назад

@@fbi3544 yes

@FuSiionCraft 3 года назад

2 strokes and rotaries : *idle at 50k rpm, rev at infinity*

@jochen__ 3 года назад

*laughs in Simson 2 stroke engine*

@jochen__ 3 года назад

@FichDich InDemArsch Yeah but MZs also don‘t rev that high.

@therandomman6647 3 года назад

No valves so they rev as fast as you can put fuel and air in them

@Sakura4348 3 года назад

@@therandomman6647 sooo multiple inline turbos all with increasing boost and insanely large 1000 cc or bigger injectors?

@michelguevara151 3 года назад

@@therandomman6647 reedvalves and transfer ports, sir! do you know nothing of expansion pressurisation exhaust gas valving? those spannies stop unburnt fuel being sucked through at higher rpm causing over burn of the incoming charge, the reeds stop mixture being forced out via the carburettor, and the position and dimension of your piston's porting is your inlet valve and timing. then there's powervalve solutions of various types.. lots of valves in twostrokes, more in fact, more diverse.. some a little more theoretical.. but not as barking mad as intersectional feminism. ungineering mate.

@michaelshive6748 3 года назад

If I'm not mistaken, the 2.4L V-8 of F1 from 2006 to 2013 revved up to 22,000 rpm

@MDDeGrande1994 2 года назад

Not only the V8s but also the V10 from the 2004 BAR Honda 006.

@tiagofigueiredo2529 2 года назад

Honda RC115 reved up to 22.500rpm

@alecjones4135 2 года назад

Only reason why I watched the video was to see if he mentioned those F1 engines

@canadianwelder3899 Год назад

Think Cosworth did it first

@AnIdiotAboard_ Год назад

They never reved that high at a GP Event, the FIA got wind 22,000 RPM Honda engine with significant performance upgrades, a 19,500 rpm limit was enforced after pre-season, later reduced to 19,000 rpm because teams decided using beryllium was not a good idea but a bad idea. Even though 20,000 is an arbitrary figure were not limited there, and there are plenty of engines that will scream well north of 25,000 rpm.

@gameeverything816 Год назад

I've watched a lot of donut videos and this one in particular is fantastic. The editing, knowledge, pacing, and actual interesting information was spot on. What a great video.

@RCTanksTrucks247 3 года назад

Good old CBR250RR revved over 20k. Loved that thing!

@danieltasker8012 3 года назад

Or a lot Honda’s 60s and 70s race bikes

@Popsicle_MP 3 года назад

i'm pretty sure they redlined at 19,000 and only if they had their ECU adjusted or you bought one meant for the Australian market, all the models built for the Japanese market were restricted and peaked around 17,000

@obsgr1 3 года назад

23000rpm. I had one. It was phenomenal.

@huh2634 3 года назад

@@darrengolladay9359 nope, cbr250rr's are 4 stroke..

@screamfingers 3 года назад

Yes my dude one hell of a bike. Makes all the right sounds.

@nellyishtari 3 года назад

The valve: *floats around* The piston: - Go back to your seat!

@xjmg007 3 года назад

The valve: (taps piston) no

@nellyishtari 3 года назад

@@xjmg007 The piston: - I said, back to your seat, it seems your guide haven't taught you anything

@aaronbryan5095 3 года назад

@@nellyishtari engine block and cylinder head: Oui, wtf are you 2 doing?

@usmanhaider8490 3 года назад

Valve: I like your cut, G. Piston: SMACK Valve: EEEEEEEEEEEEEEEEEEEE

@limegreenracerpro3369 3 года назад

If you really think about it, it's almost like a game of chicken. Just repeated.

@noahdavidson7008 9 месяцев назад

“Impossible to rev over 20,000 rpm” runaway diesel: hold my beer

@Alph92 3 года назад

I really like this style where you explain things in a serious manner without goofing around

@matteoprada5851 3 года назад

2 stroke: *HELO*

@mitchsharp5718 3 года назад

That moment when you’re standard 2stroke bike Revs to 14000rpn

@710Canada 3 года назад

The 02 ZX12R could hit 16k. 4 stoke 4 cylinder.

@cameronbitz9124 3 года назад

@@710Canada so not 20k

@fabionajazi6180 3 года назад

I seen two stroke bikes on a video revving up to 21.5k

@710Canada 3 года назад

@@cameronbitz9124 wow, aren't you gooder at maths... 14k isn't either. Or is it?

@faustin289 3 года назад

"...not limited by physics, but rather by mother nature." Is there a difference?

@TheTyisawesome 3 года назад

Yes one is a fact the other is opinion...

@faustin289 3 года назад

@@wubalub2535 do you have an argument to advance? Or you're just trolling the internet spreading toxycity.

@daszieher 3 года назад

@@faustin289 trolling the internet spreading toxicity? Sacrebleu, mon Dieu! Nooo! Who would ever do such a thing? 😱

@psmv3 3 года назад

@@daszieher cdn?

@psmv3 3 года назад

cdn?

@phatpun9545 3 года назад

This is a premium high school Presentation. Top notch. Very informative. 💯

@mikekopisz1227 3 года назад

Dude,The nitro engine in my track car (in thumbnail) runs @ a consistent 42,000 rpms and fits in the palm of your hand

@braydenwildey3366 2 года назад

Nitro Radio Control engines can rev all the way up to 50,000+ rpm!! You are right!! I have a Traxxas revo 3.3 and that bad boy peaks horsepower at around 30K. People need to be informed about these engines!!

@bmxscape 2 года назад

@_. this is a direct quote from the guy in the video: "the fastest revving motor peaks at around 20,000 rpm" he didn't say anything about the size or type of engine, just that it is a "motor". by definition he's wrong lol

@drtm1718 3 года назад

Basically, Jerry at the end: "your mom should have sw--" Donut: "Cuuuut!"

@jeanm.9570 3 года назад

Yeah, I don't know why they included that bit when they even didn't let him finish...

@pdtrjck8068 3 года назад

@@jeanm.9570 like the mom shouldn't have let the dad do

@magnumowner 3 года назад

What i learned from this video is that actually the most limiting factor is money lmao

@LunarStrike 3 года назад

That would be the limiting factor to almost anything

@Popsicle_MP 3 года назад

that is by far the most accurate explanation

@Si74l0rd 3 года назад

Yeah, we all need Konigsegg free valves in our engines. Simple!

@Si74l0rd 3 года назад

@Enrique Rojo Jorge If you can't keep your data safe from 'em, might as well join 'em ;)

@silverliteway 3 года назад

Yes money let f1 rev up there and the teams planned higher...damn regs!

@Ivovify 3 года назад

Great vid, learned a lot. Tnx!

@jmontign1 2 года назад

Lots of good information here. Thank you

@daviluluwinner1823 3 года назад

Simple answer: combustion engines can only go a certain amount of vroom.

@lucasmason2256 3 года назад

Good try

@wolfiethesniper5403 3 года назад

AKA overr 600 mph

@ericpe2325 3 года назад

@b1tb0mber 3 года назад

haha combustion engine go brrrr (but only so much)

@Ashchu117 3 года назад

okay so basically what you're telling me is that I need a rotary

@weekendwrench 3 года назад

They max at 20k rpm too 🙄

@jacobwebb8818 3 года назад

@@weekendwrench if a rotary were to hit 20,000 rpm the rotors would only see 6,666.67 RPM because the eccentric shaft is what is counted as a revolution from a rotary, the eccentric shaft spins at 3× the rate of the rotors

@DatDarkOne 3 года назад

I was waiting on this reply as I was saying the same thing.

@CrypticApathy 3 года назад

You would be hard pressed to do it. They wouldnt have to worry about the first 2 issues. But they would about the 3rd issue. You would spin faster then the fuel could be ignited. They already have a problem with having unspent fuel stock. Making them spin faster would only make it worse. You would more then likly just flood the engine at higher rpms.

@MazdaRX7007 3 года назад

A turbine engine would be the perfect rotary in this case.

@christianmontrose331 3 года назад

You’re videos teach me more than school and I appreciate you guys much love 🤍

@agentlongwood 3 года назад

In the section on valve float, I'm surprised yall didn't mention the system Ducati uses. Desmodromic valves have a thing like a rocker to open the valve, but no spring to close it. Instead there is another rocker looking thing that forces the valve closed, which is also run off of lobes on the camshaft.

@littleshopofelectrons4014 2 года назад

True enough but today's valve spring technology allows the engine to rev just as high without the complex desmo system. Even Ducati is phasing it out.

@ammkdagoat3499 3 года назад

Jerry: " uno, dos, tres" RU-vid ads: "allow us to introduce ourselves"

@TheIcyWulf 3 года назад

Yes.

@IMattayy 3 года назад

I'm sure they time the ads for things like that Any time I get an ad like that I just think how about you fu*k off *clicks why this ad, don't see this ad again*

@baraaalasfar5841 3 года назад

I’m dead

@drearyfying249 3 года назад

RU-vidrs can decide where they put ads. Also, download RU-vid Vanced. I haven't seen an ad in months

@kali6651 3 года назад

Download RU-vid Vanced.

@saims.2402 3 года назад

Imagine having engine’s with pistons moving faster than the speed of sound

@samantharondeau4580 3 года назад

Wonder what the exhaust note would be lol

@zirkh1609 3 года назад

@@samantharondeau4580 it would be deafening for sure. Just imagine multiple Sonic booms in fast progression. You would hear the exhaust note for a second and then hear close to nothing the next

@HappyDude1 3 года назад

They do that allready Edit Im wrong i did some calculations and its moves about 10 m/s at 6000 rpm if you count in both directions its 20 m/s And the speed of sound is 343 m/s 😆

@randominternetguy 3 года назад

Can't imagine this happening in a modern 2 or 4 stroke cylinder. There might be some gains from this new variable compression engines from a couple of companies, as the implementation reduced piston side load a bit. Still regarding piston engines though, I don't think it's near enough that an engine could surpass 24k rpm, as the con rod is the issue more than the pistons. However there may be a few rotaries, ie the Atkinson rotary, that may surpass this 23000rpm barrier quite easily. As I recall though the Wankel rotary is no good for this purpose, but I did hear that people got pretty close to record rpms with 13b motors. I also recall that the valve actually had little enough float that honda was using valve springs for it's first record setting f1 test engine. Ordinary valve springs.

@trevorsangsland7572 3 года назад

When something breaks the sound barrier the affect it has the air around could cause more issues i dont if you've seen a jet or a bullet in slow mo breaking that barrier but I think that force could potentially shoot the piston down in the cylinder. I could be very wrong tho "When the object reaches the speed of sound, air cannot readily move out of the way and a shock wave is formed. When the object is moving faster than sound, the resulting sounds travel behind the object, creating a sonic boom." (www.school-for-champions.com) So what were to happen if you created a sonic boom in a cylinder

@royharkins7066 3 года назад

Wow ,that was sensational , I learnt shed loads , thanks mate

@the40ozprofit79 3 года назад

"It's Almost Impossible For An Engine to Rev over 20,000RPM" *Laughs in Ninja ZX2R with removed rev limiter*

@kylemelcher894 3 года назад

The RPM of Jerry’s heart during a Keeps ad is 100000000000

@mikesuarez9615 3 года назад

LMAO

@car-enthusiast3141 3 года назад

Lol

@honeybadger0562 3 года назад

That’s why he needs to donate to the Ronald Reagan medical center so he can have a healthy heart

@thomashanson6603 3 года назад

I love the fact that this suggests that his heart is just like rotating in his chest lol

@jasonander4964 3 года назад

@@thomashanson6603 HAHAHAHA imagine a surgeon about to give him a transplant or something and they cut him open and just see his heart spinning OBSCENELY fast

@Niugnep 3 года назад

“You’re a trade-off. You’re parents traded off having a fun life for, ...” I feel attacked, but it’s too funny. Love you and the donut crew!

@zerobatsu 2 года назад

I love how it just cuts off before he digs deeper.

@Jonnyg325 Год назад

We demand 2 apologies, 1 for the insult, and one for an extremely tortured metaphor

@TheWinjin 10 месяцев назад

Also the editor poking fun at him with subtitles

@Noksus 3 года назад

Nice, actually learned a bit about how an engine works. Never been really interested in it much but that was neat.

@crossmeister 3 года назад

"You're a trade-off, okay?" with finger pistols is my favorite Jeremiah wallpaper now.

@DrDrift-rl6cc 3 года назад

That was a pretty savage roast at the end

@pf4877 3 года назад

An F1 car today: "I set a record in F1 cars for reving to 20,500 RPM" A CBR250rr from 1990: "Hold my beer"

@ftheweebs6799 3 года назад

RC 166 : hey

@shanondebbarma 3 года назад

RC149: Hey

@norwegiannationalist7678 3 года назад

Nitrp rc engine: hold ny beer

@bricefleckenstein9666 3 года назад

Williams FJ-33 as it's HP fan passes 45,000 RPM: "Was this supposed to be a competition?".

@ellogovna8329 3 года назад

Mtt ysk; amaturs

@plasma6593 3 года назад

that one civic at 3am: is this a challenge?

@thor6264 3 года назад

Civic makes at least 1,000,000,000,000,00 RPM

@andy56duky 3 года назад

@@thor6264 or make those ricers make a fartcan revving to 5000 rpm saying" its over 9000" like an idiot.

@darkknight097 3 года назад

@@andy56duky I get the first guy's joke but yours doesn't make any sense. A k20 civic can rev to 8-9k pretty easily

@ebrahimsayed8263 3 года назад

very cool video, keep it up 👍🏻

@khalifanddumba9912 2 года назад

Basing on this simple nice explanation....ive subscribed

@TypicalGoosie 3 года назад

“It isn’t physics is Mother Nature” goes on to discuss physics.

@heygek2769 3 года назад

talking about the previous video on top speed, the problem wasn't physics, it was geography

@abstract0407 3 года назад

Really weird and random physics

@buttsexandbananapeels 3 года назад

Yeah, it was a weak sauce intro.

@Dug6666666 3 года назад

HRC Honda, hold my beer. Small capacity RC 2 stroke engines around 40K rpm

@thiago4santos 3 года назад

Physics studies nature, so is accurate.

@inspector13jjf 3 года назад

That car in the beginning sounded like a little kid raging on COD.

@MyNameIsNidos 3 года назад

Literally the essence of classic MW2 lobbies

@Sahidable 3 года назад

Holy shit the accuracy 😂😂😂😭

@davidmesraje1695 3 года назад

Like I’m pretty sure all the donut media commenters recognize these same spam post lol

@davidmesraje1695 3 года назад

We all know your spam just stop 😂

@Marsonpika 3 года назад

Facts

@moped.johannes2738 3 года назад

Very well explained

@austinsmith9413 3 года назад

"no engine can rev over 20k" Me: drives old rc car with engine that revs to 50k rpm.

@jimbob9328 3 года назад

Was looking for a comment about nitros

@zachr5676 2 года назад

I was hoping to see a comment on rc nitro rc engines. I get that there is next to no mass compared to an automotive engine but it still is proof that it is possible

@neilmowles7964 2 года назад

@@zachr5676 two stroke rather than four stroke aswell

@therealsnoop7497 3 года назад

This show needs to be renamed to science garage Edit: for those of you saying, “NO!! The show isn’t the same without Bart!” In my opinion Jeremiah is still entertaining and knows about the stuff he’s talking about. He talks about how cars relate to science, just like how science garage did. The show is a lot more like science garage than bumper to bumper. Early b2b episodes featured James, and even Nolan and Jeremiah reviewing super cool cars. This is a lot different from old b2b, and a lot more like science garage. Even this specific video they did a science experiment, again just like science garage.

@cpscps2679 3 года назад

Sounds familiar...I miss that guy.

@ultraguy8771 3 года назад

@@cpscps2679 Whatever happened to him? I know he left because he had a kid, but he seems to have vanished off the face of the earth.

@jasonander4964 3 года назад

@@ultraguy8771 he’s on Instagram, @bidsbarto, and as far as I know, he’s left donut completely behind, not making any posts relating to them (again, as far as I know).

@ElZamo92 3 года назад

No. this dude looks like he knows nothing about whats hes talking about. Much unlike science garage.

@rootaficationism 3 года назад

You're way off dude!

@tubastud06 3 года назад

"Isn't limited by physics, but rather by mother nature" - That's... That's literally the *same* thing

@heygek2769 3 года назад

Nope, the problem was geography, not physics

@carlosverdugo9684 3 года назад

I dont think a plant is physics...

@Ryan....... 3 года назад

@@carlosverdugo9684 Every aspect of nature boils down to physics.

@ulifehr5357 3 года назад

What I THINK he meant "THINK", is how the fuel couldn't really catch up with the piston, so I mean yea it's a form of physics, but how rapidly do you think a gas could expand and ignite 🤔 maybe we need some new fuel? 2 Stokes don't use valves so problem 1 solved, but what's next? A super high pressure injector thatll help thrust a piston downward+ the fuel ignition? Idk we'll have to start making blue prints of the best possible design in engine motion

@jaykoerner 3 года назад

@@ulifehr5357 I think your talking about a wankel engine.... Fixes the majority of those a issues

@darioinfini 3 года назад

Hahaha nice vid brahv. Good snark between informative content. "You're a tradeoff" LOL

@oddjobbob8742 2 года назад

Thank you for verbalizing my pain so clearly.

@maschan91 3 года назад

*valve floats* Ducati: Hold my desmosedici.

@MortimerJones99 2 года назад

I'm curious why he didn't mention Ducati during that segment

@IKATEN501 3 года назад

"Make sure you rev it up to 11'000 rpm" -Bunta Fujiwara

@Alvon_PR 3 года назад

-Turn on Light's -Tachometer : 12100 RPM -Takumi : Oh Sh*t

@matthew_natividad 3 года назад

*Sound files rage intensifies*

@shackman1306 2 года назад

Thank you again. Never stop learning.

@kmonkey4138 3 года назад

I wonder what the RPM limits of a rotary engine are. Would be interesting to see how much force an eccentric shaft could handle from the rotational force of multiple rotors

@christopherpape4823 7 месяцев назад

I was just thinking that it seems like something like a rotary engine would possibly provide somewhat of a solution for the first problem 🤔

@ryanm2700 3 года назад

“You’re a trade off!” may be the best insult ever 🤣

@catalystkitty 3 года назад

MC22 CBR250RR: 4 cyl 4 stroke, rev bouncing above 20K RPM daily since the early 90's and still going hard

@johnamador887 3 года назад

My first thought.

@Aduro90 3 года назад

My first bike 😍

@FirstLast-tx3yj 3 года назад

You had it for how long??

@ralphm4132 Год назад

yeah my workmate had a CBR 400 that went to 18 easy, while my FZR 400 only went to 15. We'd drag off the lights every day after work, good times.

@Emfourayone Год назад

17.8k actually tach was inaccurate cdi would only provide enough spark for that

@davidvalderrama1816 Год назад

Sir, I assemble engines for a living, 15+years, and your presentation and explanation was excellent. Thank you

@matthagge4792 3 года назад

You forgot Ducati desmodromic valves! I know bikes aren't the focus of this channel but it's another very interesting way of controlling valve float.

@JohnnieFruits 3 года назад

I'm really surprised that Jeremiah, the motorcycle guy, didn't mention Ducati's desmodromic valve system

@srgbobbert 3 года назад

Glad I'm not the only one

@tartarosnemesis6227 3 года назад

Desmodromics for the win!

@andrewpalmer859 3 года назад

Or the old cbr250rr 4 cylinder bikes... 20k redline and for public roads!

@syoukhan 3 года назад

yeah beat me to it. I'm here in Italy furiously gesticulating at my laptop. This is unacceptable

@riadafandili4586 Год назад

wait, didn't he mention that in a different video though?

@TheGardeinator 3 года назад

"The piston, it could hit that valve - it's called crap day"

@juliocabrera5842 3 года назад

I was thinking he was gonna say a profesional name for this 😂

@TheNutshaq Год назад

I love these videos where it’s just Jerry being smart for 15 minutes

@RTZ_EDITS01 Год назад

Hey your ads are so funny😂😂 and the videos too😂

@iPossum452 3 года назад

I love the newer direction that B2B has taken. It’s a really good continuation of what Science Garage used to be. Thanks Donut (:

@DroopyLoops 3 года назад

Y'all auto color correct got my boy looking like he's got on Coral #4💄🙏😂😂😂

@mohammadyaqoob746 3 года назад

Thanks, I just got the idea for my final year project

@parke4112 2 года назад

My dad is a mechanic and I know nothing about engines, I'm a musician, however, I really enjoy your content guys, love u

@charlespletzke8311 3 года назад

Rotaries: haha dorito go burrrrrrrrrr at all the rpm

@willadams5758 3 года назад

Came to say the same LOL - I love my 82 GSL

@aestheticswim3397 3 года назад

better have a closet full of apex seals

@liamwagner9160 3 года назад

I was wondering why it wasn’t mentioned🤔

@charlespletzke8311 3 года назад

@@aestheticswim3397 an entire room in a house just filled with apex seals. Can’t carry any cargo, all the space is taken up by spare apex seals

@brokeandtired 3 года назад

Rotaries still have the flame front issues....So even they are limited...(And before someone says it...I know. R/whoosh....I know its a joke).

@Keegsbruh413 3 года назад

Dont mind me. Just impatiently waiting for this week's money pit

@carsonmeyer1677 3 года назад

What happened to their schedule?

@Sam-rk6lq 3 года назад

Rip

@vincentasher9903 3 года назад

C’mon with the money pit!

@NomadJedi 3 года назад

No money pit this week or the next. They're on vacation.

@ayubasghar1345 3 года назад

EXCELLENT VIDEO, THE BEST VIDEO SHOWING VALVE FLOAT

@constillustrus 3 года назад

Nice topic!

@yuuji_ 3 года назад

90's japaneses 250cc sportbikes toping out at 19k rpm : "i am speed"

@manman-sg1zt 3 года назад

130W dremel maxing out at 33 000 rpm...it do be like that though.

@TheCabbageMan 3 года назад

"Turns out top car speed is not governed by physics but by mother nature" sooooo... physics

@bricefleckenstein9666 3 года назад

And that top speed keeps getting pushed higher every so often. "waves at Thrust SSC"

@andreichichak5242 2 года назад

Yeah, I always thought that physics described nature, but I guess Donuts describe nature.

@thegreatafrican3367 Год назад

That was just a dumb statement

@nathanramos9675 3 года назад

As a rotary boi, I was sad to hear this knowledge bomb doesn’t include us

@Sabba7h 3 года назад

One of the few times I _don't_ skip through an in-video ad and it actually ended up being useful to me?

@thegreasybandit6373 3 года назад

Me: What it's over already? RU-vid time bar: It's been 11 minutes Me: Man, time flys.

@jakemauger8377 3 года назад

1/8 scale R/C car engines regularly turn 35-40k rpm. The really high end ones can sometimes reach 50-60k.

@edblock8117 Год назад

I think most of these are 2 stroke

@bassman87 2 года назад

thanks for reminding me to check the mail for this quarters keeps!!! lol.

@dastarddizaster 3 года назад

Well explained

@ankursagale 3 года назад

Takumi: So I started revving anyway......

@nemanja6037 3 года назад

donut start drinking Nos: heartattack donut start putting chemicals on head: They buy Yugo

@kelvinjenkins3060 Год назад

Man, Jeremiah is such a good teacher, love it

@oscarsomers8597 3 года назад

2:30 in 2 sec this guy taught me what 15 min videos couldn't

@929roger 3 года назад

7:17 You forgot the desmodromic system, which basically opens and closes the valves mechanically. A system which Ducati stills using today

@ardijanuar2036 3 года назад

Still doesn't solve the reciprocating mass and flame speed problem. It's also more complicated and require more frequent and expensive maintenance, like every modern ducati did (except multistrada v4)

@fred_e 3 года назад

Came here to mention the desmodromic system as well

@ArtoriusBravo 3 года назад

@@ardijanuar2036 I dunno man, correct me if It's just a dealership thing but a friend of mine nearly swapped his 1200gs for a Multistrada but backed down when he researched that the 40000 km service had a bill of around 2000usd.

@929roger 3 года назад

@@ardijanuar2036 at least valve floating is solved 😂

@PhilipBeresford 3 года назад

I came here to say this, but then I remembered that desmo Ducati's don't rev past about 12k rpm anyway

@FaaaaapMaster 3 года назад

0:22 Of course I needed to hear that engine on MAX VOLUME!

@ElliWoelfin 3 года назад

That was fucking painful.

@philipgrice1026 3 года назад

1966 Honda RC166 motorcycle, as raced at the Isle of Man TT races by Mike Hailwood. 250 cc 6 cylinder with four valves per cylinder was run at up to 25,000 rpm on the bench and up to 20,000 on the track. Max power occurred around 18,000 rpm.

@how57 3 года назад

You are the most chilled out donut media guy

@mrtechnical4 3 года назад

I feel like you guys missed an entire section of piston engines that DO cycle consistently faster than 20,000 rpm. Nitro-Methane RC engines will spin at 30,000 rpm all day long and some will go higher than that into the 40,000 rpm range. Granted those engines use top fuel and also don't work if scaled up to actual car sizes, but they do exist. Obviously the valvetrain issue is solved by the engine being 2 stroke and the oscillating mass is taken care of by the high relative strength of the titanium they use combined with their low mass. It does leave me wondering how fast the flame propagation is using nitro-methanol if it can rev that high with no issues.

@megimargareth4015 3 года назад

Small cc engine means small space the fuel needs to burn to the edge, lol Thus the flame propagation in this case is on different level with a full size car, lol

@heygek2769 3 года назад

you answered your own question, the problem there is scaling, the movement of the cylinders is linear, which would scale linearly, but volume and mass don't scale linearly. this is also why airplanes can't just be scaled up or down with the exact same design.

@RandoTark 3 года назад

Regardless, every time I hear one of them or run my own ... Im always amazed the engine internals stay together at those speeds and last as long as they do ... its quite nutty.

@derekmaxwell8164 3 года назад

The old 1.5 litter F1 engines use to spin like 22k before they started making rpm limits to lower power

@derekmaxwell8164 3 года назад

@Hasi Mausi plenty? What like a 50cc motorcycle? Cause even the old high revving 250cc crotch rockets usually only turned 15-19k at most

@markwerner7297 3 года назад

I like how bumper to bumper just turned into science garage

@GHOOGLEMALE Год назад

Brilliant explanations - whats the view on Wankel Rotary Engines - do they overcome any of these issues

@Axe991 3 года назад

Another system col mechanically closing valves is the Desmodromic one, mainly used on Ducatis. You have one cam to open the valves and another one to close them.

@mfnafi5 3 года назад

Me: *gets a youtube premium trial to skip all the ads* Donut: Here's a 15 minute ad for mail pattern baldness.

@krisscrossapplesauce6636 3 года назад

At least the ads are quite entertaining

@yaboianz 3 года назад

@@krisscrossapplesauce6636 true i rarely skip them because donut is hella creative lmao

@jarno3000 3 года назад

Mail...

@gabrielvieira6529 3 года назад

pololol.

@Applejack1396 3 года назад

I was just thinking the same thing

@gamechip06 3 года назад

Ok I regret skipping the entire keeps ad and hearing "I'd look good in a bikini" without context

@madarauchiha2067 3 года назад

@@iwantsexseemyvideo2929 Wtf is is with these bots

@aperson6863 3 года назад

@@madarauchiha2067 the owners/people who pay for these bots think that since we like cars, were all a bunch of rich and _horni_ grimy old men when in reality, were either young adults, or literal children... And some of us aren't even dudes. Edit: also sometimes you can get reported for explicit language for @ing some of these bots, like the one you @ed.

@Tacko14 3 года назад

@@aperson6863 and there’s the vid going on about suck/squeeze/ah... bang/blow. Life’s not fair

@TheIcyWulf 3 года назад

You should.

@KeeperOfTheSevenKeys. Год назад

And now we have electric cars on the consumer market with motors which can spin at over 20k RPM.

@nolesy34 Год назад

Is all the fast they go? 20km? My gasoline powered pushrod v8 can go 120 baby!

@BoldRam Год назад

12a Rotary has been bench exploded at just over 33,000rpm. Different type of engine but sill pretty bloody impressive.

@3.9L_V8 3 года назад

Speaking on valves, there's also desmodromic valvetrains in which there is a seperate cam for opening and closing the valve, eliminating the need for a spring. Although they eliminate valve float in the traditional sense, they are more complex and more expensive. I think some old Merc racing cars used them, and Ducati is known for their Desmo engines

@puffyg2050 3 года назад

0:42 flashbacks to 2017-2018 science garage

@voidnimbus 9 месяцев назад

The thought of having Dr. Falcon as my new therapist is strangely welcoming

@MandusahRamirez 2 года назад

Love This Guy!👌🏽😂

@dh66 3 года назад

I've got a motorcycle from the '80's that has a 19,000 RPM redline.

@Rotorr 3 года назад

mc19?

@dh66 3 года назад

@@Rotorr FZR 250R

@user-hc5si5tw5p 3 года назад

I really really want one of those. Some modern tyres and suspension etc would make that an absolute hoot to ride. Must sound like nothing else on a flyby.

@fokiralomgir2563 3 года назад

@@Rotorr had one of those. The sound coming from one of those was pure joy

@Rotorr 3 года назад

@@fokiralomgir2563 im currently rebuilding my mc22 for track use. If it wasn't as light and fun to ride i wouldn't have bothered. A simple twist of the wrist will bring a smile ear to ear.