What Is Horsepower & Why It's A Dumb Unit - America vs Metric
HTML-код
- Опубликовано: 25 июл 2024
- What is the difference between HP, CV, PS, and kW? Why is horsepower a dumb unit?
Horsepower vs Torque - A Simple Explanation: • Horsepower vs Torque -...
Subscribe for new videos every Wednesday! - goo.gl/VZstk7
Recommended Books & Car Products - amzn.to/2BrekJm
EE Shirts! - bit.ly/2BHsiuo
Horsepower is a unit of power created by James Watt in the 1700's. Who knew all these years later we'd still be using a unit he developed to compare steam engines to horsepower. We'll go through Watt's back of the napkin math, discuss in simple terms what horsepower means, and look at metric horsepower as well: PS, CV, and the many other abbreviations. Whether metric or imperial, horsepower as a unit makes no sense at all. We'll wrap up the video learning what unit we should actually be using.
Related Links:
Derivation of HP - aapt.scitation.org/doi/10.111...
HP vs PS vs CV - www.autoweek.com/news/technol...
Engineering Explained is a participant in the Amazon Influencer Program.
Don't forget to check out my other pages below!
Facebook: / engineeringexplained
Official Website: www.howdoesacarwork.com
Twitter: / jasonfenske13
Instagram: / engineeringexplained
Car Throttle: www.carthrottle.com/user/engi...
Amazon: www.amazon.com/shop/engineeri...
EE Extra: / @engineeringexplainede...
NEW VIDEO EVERY WEDNESDAY! 
Авто/Мото
Horsepower = horsevelocity * horseforce
Should be Horse (squared) power
Nah, it's horsevoltage × horsecurrent
They will never truly replace horses is all I'm getting from this
how does he hold the lightsaber?.....kidding, of course its horseforce!
Horse is a non-SI unit prefix, but I will allow it. HorseAmps, HorseElectronVolts...
Fun fact: "cv" means "cavallo vapore", or quite literally "steam horse"
sounds kind of like an item you could find at a restaurant :D
Here in Brazil we say: Cavalo Vapor
Caballos Vapor in spanish.
Very interesting…. I’d always just thought it was CaValli.
same in French, the full name is "cheval-vapeur" but we usually just call them "chevaux" ("horses"), abbreviated "ch"
As a 62 yo Australian (and ex-tradesman) I grew up with the old imperial system and then had to learn the metric system after we made the transition after 1970. I remember at first everyone kept converting metric units back to their imperial equivalent so that it made sense and had meaning. Over time you just understood what it all meant. Americans have yet to make that journey but believe me when I tell you that it's not a difficult journey and once you get there you won't look back. The metric system is in fact perfect. We've all moved on from using horses as our main power source so it makes sense to move on to a more logical system of measurement. Did you know that one litre (correctly spelt) of water weighs one kilogram... perfect!
And liters are basically just a spin of meter cubed in a lower magnitude, but straight convertable
Of course the metric system is the more make sense than the imperial system as the metric units derived after considering all the things. including the using base 10, so we will be easier to scale. 1m=1000m. Compare to 1ft nothing scale to 1mile (1mile=33,375fts). The US is one of a very few countries that are still stubborn to use imperial systems rather than to adopt metric system, which is international standard. Of their stubborn, Space Shuttle Challenger blew up just 73 seconds after launched due to wrong unit conversion.
Nah I don't like how 100km is only 60mph.
@@fizzinsoda 62mph, I'll have you know!
Nah, we'd just make an American football field based measurement system.
Conclusion: American horses are 1.4% stronger than everyone else.
'Merica!
Except James Watt was Scottish, and in the UK we still use imperial HP. You're welcome.
@@paulchatterton1 Am I wrong or McLaren use metric hp, as in 600lt, 620r, 650s, 675lt, 720s, 765lt....?
@Imran A yes
Of course our horses do more work than those danty foreign horses
If you were Australian you would get to enjoy cars being rated in kilowatts as well as being upside down.
Strewth!
Don't forget about being right hook as well..
They're not rated in kangaroopower?
@@jameshaulenbeek5931 that'd be the rating if americans moved to australia
Aint that mostly true all over the world?
@@lolish1234 pretty much lol
"A horse could have more than one horse power." That's poetry, man.
its true though, search on google "how much horse power does a horse have"
maximum output of a horse is around 15 horsepower，lol
A horse has around 15 hp
How much horsepower does a clydesdale have?
the steroids worked
Maybe James Watt was just horsing around when he came up with horsepower
What are you doing here?
@@travisfrank4706 does he need your approval to be anywhere?
@@-Sam69 its a Bojack reference. Go be a tough guy somewhere else.
Ok Dad
@@travisfrank4706 i think its a copied reference so go take your useless somewhere else
This is the most popular and thoroughly researched community college class I ever got into.
A recommendation for the unit of complexity:
A fenske = how many whiteboards you need to discuss a topic
And computer power should be measured in fenske/sec
How many whiteboards per 10 minutes of video explanation ||| whb/kmve : fenske si unit
@@AaronSchwarz42 Just barely under one fenske.. but I guess we have to define the size of the whiteboard.. let's say it's a square meter, so one fenske is m² in si
Hahah
10:02 I kinda have an issue with the word 'nonsense', it's all just physical quantities from the past.
Nevertheless, I give the video 2.4 kJasons of entertainment,
>laughs in australian
>remembers I'm not australian
>proceeds to brag about my car making 61,500 duckpower
How many kangaroos did u pay for it. ?
fun fact, I watched an Australian car channel video where the journalist gave his height in foot! Don't know if he was an imported Oz though. But, as we are all colonies we have to bow to the Imperialistic nonsense.
@@USUG0 for some reason, the height of a person is the only vestige of imperial still regularly used in Australia (some elderly people will occasionally use feet/foot for distance though) , but anyone younger than gen x is less and less likely to. When it’s used, it’s almost always used alongside the centimetre measurement of height too though.
@@sjb2471 Most people in Canada still use ft/in for height and lbs for weight as well. It's only commercial or places like a doc office where you see kg and M, in general.
Horse power academy is a great Aussie/New Zealand RUclips channel. Hilarious joke btw.
"A horse could have more than one horsepower."
Clydesdale: hello.
Or a Belgian..... have friend with 2 of them, awesome.
the average horse is actually capable of 15 horsepower, i saw a theory one time that Watt came up with the number by seeing a pony put out about half a horsepower and he was like "well a horse is about double that size so it probably has double the output right"
I’m pretty sure the average horse has 25 horsepower
@@Kevin-dt9xm well if a horse weighs 1100 lbs, it could only plod up an incline at 6 vertical inches a second if it had 1 horsepower. It's an "all day" output for a draft horse.
As an Australian, it’s so satisfying watching this video 😂
As a fellow Australian, I couldn't agree more 🤣
😂.
In sweden we still use "hästkraft" which is directly translated from horse power.
I am trying to get used to kW in cars but it is difficult 😁.
Yep, same here in South Africa. The metric system makes so much sense (for measuring a lot of other stuff also: e.g. distance, volume, etc.)!
I knew it!, the correct unit should be Llamathrust
No!
It's DONKEYSTRENGTH!
*Duckpower
Muleforce!
Love me a good Llamathrust.
Beaverjaw
Should've said "Thank you for watt-ching" at the end
Maybe he did and you just didn’t catch it?
Oh boe...
S.I Units, its scalable in a easy to understand manner. 1000mm , 100cm , 1m etc...even in slow Africa we work on that.
the "watt if" joke definitely just earned you my subscription lol
How about the "thank you for Watt-ching" at the end
Hehehe
I wonder how many manufacturers stick with horsepower purely because it gets higher numbers
Probably all of them. I know when I'm watching Mighty Car Mods and they talk about 250kW I'm less subconsciously impressed than I would be if it was 335 bhp.
@@XenFPV All you have to do is think "Holy cow! that's a 250 _thousand_ watt engine!"
@@reedhoward27 If only it was that easy, women would think "Holy cow! thats about half a foot!"
Well McLaren being a British car company strangely use metric HP, not British HP. But having said that they say their engines develop a certain power, but in reality they develop much more, which is even more confusing...
It's because people aren't smart enough to convert to killowatt also it's what people are used to and understand. Car market is smart. They know most people don't care to learn. New things and stick with what ppl already know. Most people are sheep 🐑. It's sad.
In Switzerland, actually I think in all of Europe the power of a car is most of the time mentioned in kW and PS (hp).
Yes, I can confirm this. According my experiences (in Hungary and Germany at least) when average people talk about cars, they prefer HP/PS to kW.
In Czechia we care more about kW.
@@navrasicsi When talking about cars no one ever mentions kw here in Germany. Everyone talks about PS.
Officially, here in The Netherlands the power of a car is measured in kW, but PS (PK for "paardenkracht", or "horse power" in Dutch) is mostly used by regular folks.
In Russia, in car papers both kilowatts and horsepower are used in conjunction, but people mostly use only HP.
Great video!! In fact, KW is the official unit used by car manufacturers and is also used to calculate vehicle taxation
We've been using Kw in Australia for years. About time you lot catch up 😉🤣
US carmakers give power specs in both HP and kW. Take your pick.
I think the UK is more confused. It's like they started introducing metric and got bored and gave up.
@Richard Wood that's because the Watt is the unit of measure... kilo is just representing a thousand of them
@@eugene9852 the UK is definitely confused... they have British Standard Whitworth sizing too, who the hell understands that?
@Richard Wood fair call, you are correct in your statement there, I was just a bit lazy in the way I had written it 🤣 👍
I'm counting 7 colors on the whiteboard and I see a few horses drawn as well. This must be serious!
The horse and car drawings were about the only things I could understand.
there is 8 colors, 9 if you count white!
When he cracks the whiteboard out you better pull your chair up and pin back your ears. Jason is about to drop major info on you.
So true; this is an eight- color explanation.
You know it's something serious when there's 7 colours and I see a few horses drawn on the whiteboard.
Interestingly, a lot of heavy duty industrial diesel engines used in marine or generator applications have their power measured in kilowatts. I never really understood why until now. It just makes more sense!
MW is where it's at in those industries!
In EU cars have the power specs also in KW
There is also a formula to calculate the kW rating back to HP, which is kind of ironic but we use it all the time to track our Gensets & make sure the engine actually matches the electrical output. 🤷🏻♂️
Jason neglected to mention one more issue with using hp - that is, there are at least a dozen definitions of horsepower depending on the industry of application. So to avoid confusion it’s better to rate everything in terms of watts
Am I the only one who feels Engineering Explained should confirm if the SSC Tuara( I don't really know the spelling properly) , can actually reach 315 mph?
11:50
"A horse could have more horsepower"
that's legit funny🤣🤣
Great video! In the UK the motoring press tend to use brake horse power (BHP) which differs significantly from both SAE horsepower and PS. This is at odds with the car industry, which uses PS and sometimes also kW in its publications.
Hey Jason, we need your analysis on the SSC Tuartara's top speed record😂. I know several youtuber already making video about it, but I think you can explain it better..
YES!!! PLEASE!!! This comment needs more thumbs up!!!!
Why is Donald Trump pretty and I am not? But why does he only have a wife but I have TWO HOT GIRLFRIENDS who I show off in my masterpiece YT videos? Do you know the answer, dear davis
the car with the given cd, frontal area, and estimated weight is capable of the 330+ top speed. gear ratios say it can too. hell 6th gear in schmee150s video says it can do 293 and over 330 in 7th. so yes the car can on paper do the speed.
@@jacksonblanks8038 it did 331 mph in real life... on video...
@@NatVirgo the math as in distance/ time is not matching the indicated speed. The car can do 331 but the video has pretty much been proven that it wasn't the actual run.
Here in Czechia usually when people talk about cars they would use HP, but all official documents and stuff like that uses kW.
Tady si aspon muzes vybrat co pouzijes no
Cože? Neznám nikoho na západě Čech, kdo by používal HP. A na netu to taky nikdo nepoužívá.
@@vojtik1234 Taky neznám nikoho kdo by používal hp. Všichni přepočítávaj na kW.
Likewise in Italy.
Same in Bosnia and Herzegovina (and I'm pretty sure, rest of former Yugososlavia).
SI Units so simple :)
Love when you include both units when explaining stuff.
6:32 He uses Paul Walker's car from Fast and Furios 1 as model
its called eclipse and its not paul walkers and no one cares
In Italian "CV" (cavalli vapore), literally means "steam horses", I think derived by the idea of steam machines.
In Spain, we use CV. as well, representing "Caballos de vapor" (Horses of steam, or steam horses, as you said), and people in everyday life usually talks simply of "caballos" (horses) of a car. Very similar to Italy, I would say. :D
Same thing in Brazil, we say "Cavalos a Vapor (CV)", in portuguese. And indeed there is this slightly difference with US horsepower.
I thought France used CV too as the Citroën 2CV literally stood for '2 cheveux vapeur'
@@SD-tj5dh that's the taxable power at the time of introduction
@@SD-tj5dh Yep, that's right, as far as i know CV means Cheval Vapeur. Everybody says "XXX chevaux" though
Everytime you mention horsepower on your videos just mention the watt equivalent with it. You have a large audience and it would start putting it in people's heads. I know I would appreciate it.
Be the change you want to see 🙂
Along those lines, why don't we put up speed limit signs in kph in addition to mph? Oh...
@@posteroonie can see the headline: engineer charged with thousand of counts of mansualughter after replacing all speedlimit signs with metric
@@gabrielschoene5725 Everyone's already trying to do 100 on the highway.
but saying how many ponies you have sounds cooler than how many kilowatts
it's the opposite
My horse is way faster than your Watt. Everyone knows how much hay a horse eats, how much poop it makes, how long it takes to get to town and how much good its poop does for your crops.
@@yosyp5905 1.21 GIGAWATTS!
thats why we say how many killer wasps :)
Kilowatts sounds way cooler.....everything in metric sounds way cooler especially when you can put Kilo or Mili in front of anything to scale up or down. theres also micro,macro... etc
Was looking at the new Kia EV6 review (American market) and noticed that the fuel economy stats on one of the dash displays was presented in Miles/kWh. This is a perfect example of how ridiculous the measurement systems are in the U.S. As an Australian, to see imperial and metric units on the same display is just incredible, and not in a good way.
Well, we could always try the good old miles per gallon… of electrolyte ;)
The McLaren exhaust looks like Horse hooves now, and I can’t unsee that.
Edit: here’s a time stamp 1:11
I thought the same thing!
Philip Malaby So glad someone else gets to suffer from this realization!
I saw it too.
Adds two horsepower
Exactly!
Clearly we need to talk about lightbulbs in horsepower as well. An average domestic fluoro tube here is rated at about 20 millihorsepower!
you cannot use millihorsepower! as a measurement that's a unholy mixture of logic units and freedom units
@@XDbored1 would it be okay if they're metric horsepower? Wouldn't be so horrible haha
@@BarneyDesmond that could work it would be miliPS not as fun as millihorsepower! though
This should be the top comment
Reeeeeeee!
With more Evs and hybrids Kw could be a good option. Hopefully additional marketing will include torque and vehicle weight as as much as they market hp and mpg. All four values would help to combine the ideas of efficiency and performance as a means to the same goals, like you have with many of your videos.
This RUclips channel has helped me a lot in my mechanical engineering clases omg I love u
Sounds like you really want to use kW instead of horsepower.
I completely agree
The EU (and I suppose I should now be clarifying "and the UK") do use Kw alongside the more traditional variants of horsepower. If you look at the specs of any newer vehicle, they give both. Torque is also correctly specified in N/M, sometimes with (KgF/M) alongside for the poor dears who don't understand the difference between weight and mass.
If Ft/lbs are still specified on anything it is in a footnote or (for a torque wrench or other measuring instrument) on a separate scale.
@@phillee2814 Yep and laws etc. are based on the KW units like A2 bikes for example (max 35KW), but most people still use HP sadly
@@DeFausti people relax...... 1hp is 0.75KW.. ... or 1KW is 1.33hp, how hard is for you to convert.
@@glorious_help Where did I complain?
@@phillee2814 I think Australia and New Zealand use kW for cars.
"A horse can have more than one horse power" that really did it for me 🤣🤣🤣🤣🤣🤣🤣🤣🤣
@@DashCamSerbia and 15 for short duration
@@DashCamSerbia Yeah, actually peak output of a horse is about 15 HP, 1HP is supposed to be more of an average of what a horse can do all day.
Are we talking Shetland pony power or clydesdale power?
even one person has more power than 1HP
@@DashCamSerbia I did some reading and it looks like Ullrich, armstrong, ect.. can push over 450 watts so that is over 0.6HP
Thank you for explanation ! You managed to turn confusion into clarity. You are exceptionally good at this.
Hahah EE, this was a true engineering video, and as a fellow engineer I did laugh at "watt if" 🤣. Awesome video, and it reminded me what the units for W actually were rather than the more familiar Joules per second. Highly appreciated to make people aware of and a good watch! P.s. I still use HP for cars 😋
As an Australian, I have only ever known Kilowatts, it makes so much more sense.
As a post 1970 Australian
@@brunohill3229 yep, 1980s here.
It's only makes sense, if you grow up with it.
In Denmark we use metric HP (In danish: HK) and that make more sense to me, as i'm really do not care about the energy level the KW contains but HP is telling me how powerfull the engine is. But now many manufactores inform about the power in KW and i no longer understand how much power does the engine produce. I can look at the specs and thinking: Oh is twice as powerfull as my microwave...!
@@robina.jensen6114 That's only because you know the magnitude HP has, but you can just as well learn the magnitude watt has. You'll eventually get it.
@@robina.jensen6114 ... You're literally defending the American usage of the Imperial system with that logic...
in Italy CV means Cavallo Vapore, or Steam Horse. That's a nasty type of horse!
Same in Spanish, Caballos de Vapor.
So is that refering to a steam punk breed horse or how much steam burning a horse will generate?
both are plausible explanations I guess :D
@@kimbaleon27 😂
Same in french : Chevaux Vapeur
Final someone and hopefully many others that share this view,
Awesome video... in South Africa 🇿🇦 we adopted the full metric system of measurement...
Damn. What a great teacher you are, Jason. Both illuminating and entertaining. Keep being magnificent.
Horsepower shows the 19th century gentleman the power of these new so called combustion motors and what they can carry compared to a typical horse!
That's definitely why it stuck. At the time they had nothing to compare to.
A few decades ago, in a noisy factory, someone asked me, "What's the metric unit for horsepower?" I thought about it a moment and answered, "Watts." He responded, "Watts the metric unit for horsepower?" I said, "Yeah," and he looked at me funny and walked away.
Abott and Costello would be proud! Who's on first? Watts a horsepower?
Aw yes, my electric car can accept a 335.26 horsepower charge rate into its 99.24 horsepower-hour battery pack. The U.S. is weird...
nobody uses it like that come off it you nerd
@@KoudZ no
It’s about to get weirder ...
@@THESLlCK that's the problem. the us has hundreds of different measurements because each one is for a different purpose when one of each would do. Why have different unit for electric power and mechanical power when one would do for both.
@@lithobreak3812 because conversions aren't that hard and forcing people to change their entire measurement system is both illogical and impossible lol
I am learning English from your videos. Thank you for using nice, clear, professional language!
Everyone's waiting for your video on the SSC Tuatara mess 😂
Yeah man
Definitely
Indeed
@@mi76ke you clearly don't know Jason
@@mi76ke He answered bellow in some comment about the SSC videos and Shmee's :)
By watching Mighty Car Mods, I've become familiar with the kilowatt, and that Australians use it instead of HP for their internal combustion engines.
We use it for everything, as its a unit of power. Our cars, our generators, our hairdryers, our light bulbs, our electric motors. Thats the nice thing about using the real unit of power, its applicable to anything that uses/makes power.
Killerwasps
So do most european countries, but hp are maintained for old consumers to relate to
Proof that Straya is better than Murica.
I just assumed England and USA were the only ones using horsepower. And that their horsepowers were different to each other. Doesn’t the rest of the world use kw?
Very informative. And I loved the rant at the end. 😂
@Engineering Explained - at the very end: “Thank you so much for WATTching” ... i see what you did there! Informative video that makes me learn, as always. Hope you are well. Cheers from Denmark
A little addition: I think you wouldn’t talk about kgf in metric. One would refer to it as 1kgf = 9.81Newton
True bro. 1kgf we used in idk maybe 1970-1980? Lol
Force units is newton (N), work/energy unit is Joule (J = N•m), watt (W) = N•m/s = J/s. Work should use ∫F•ds vector equation.
dydx of fx
Exactly!! Force is in Newtons, distance in meters and time in seconds.
The kilogram is only for mass.
Also, the torque is commonly expressed in N.m
@Humberto Villegas Yeah, I don't think there is such a thing as kg f (kilogram force). That is what the Newton is. But I guess it's a convenient way to go from lbf without introducing more complexity. But it does indicate why SI system is much better than English Units, no need for random conversion numbers.
@Humberto Villegas The lb is a unit of mass, there is no such thing as a lb-mass. A lb-force is a weight of 1 lb experiencing the force of gravity 32...ft/s2. Wikipedia states that "A slug is defined as the mass that is accelerated by 1 ft/s2 when a force of one pound (lbf) is exerted on it."
@Humberto Villegas I grew up in England in the 1970s and 1980s and we had switched to metric by then, which as a chemical engineer I really appreciate. It's insane to do any kind of engineering in Imperial Units. But at work, I still think of pipe diameters in inches, and still think of beer and milk in pints, car fuel efficiency in miles (UK) per gallon, (even though petrol pumps have used litres for decades), buying fruit and veggies by the lb etc.
When you actually have to do complex calculations, the simplicity of derived Metric units like *"Watt"* definitely simplifies things a great deal. You never have to memorize anything and you can usually get by with logical analysis.
I have found that I still have to memorize stuff.
Your teaching has a lot of horsepower. Thank you for your research and conveying that to us!
"kilogram force" made my metric heart ache :(
Sad that he messed up by doing that. How many screw-ups have been caused by bundling mass with gravity?
“Kilogram-force” is the force on a one-kilogram mass under standard gravity of 9.8 m/(s squared). It is is a useful term, as is “pound-mass.”
@@DrsharpRothstein Well, i checked this thing with kilogramme at the end of this video ((kg*m^2)/(s^3)) and surprisingly it isn't wrong. You can convert it into normal equation using (F=m*a) => (m=F/a), so (kg=N/(m/s^2)) => (kg=(N*s^2)/m), then you can see that you can change this: ((kg*m^2)/(s^3)), into this: ((N*m)/s), which is (J/s) which is Watt.
EDIT: English is hard...
Yeah - it gave me a bit of heartburn. Now the sick has cleared from my mouth, I can point out that kgf was a thing in the early metric system before the SI system was standardized (now when people say metric they mean SI). SI tries to minimize the number of units and removes conceptual flaws like this.
It is metric, just not SI. 🤷♂️
In South Africa everything was changed to metric in the 1960"s. I can honestly say that I never even new there was a metric HP and you will get a very blank stare from most people if you in the old measurements. For me even worst than the HP is the difference between US and Imperial Gallon.
With metric being watts / kilowatts...
That was an over explained answer to a simple question. I love it!
Thanks! Best explanation I’ve found so far on RUclips and a great review of high school physics. 100% agree that watts are more sensible than HP. My Tesla tells me how many Watt-hours/km it’s consuming. BUT, Tesla still advertises performance of their new cars in HP! People (and countries) are very attached to their units and I think it’s going to be a long time before we see measurements in horsepower disappear.
As an Australian who grew up on KW. it so funny how you make it seem like its something new it cracked me up. hopefully it catches on over there.
And automatically multiply Bhp by 0.746 to get there if not stated
@J B did you not watch the video. Within 10 years everyone would be on the same page, worldwide, kw (like the rest of the metric system) just make more sense.
Same here mate. Just use kilowatts here. The Yanks can have their Horsepower.
And torque in Nm
Had someone try to convince me EVs should be rating in horsepower because having the motors in kW and the batteries in kWh was too confusing...
you know a mechanical watt and an electrical watt arent the same thing right?
🤣🤣
🤣🤣🤣
@@spawnof200 yes but actually no
Excellent information... Thanks!
No worries bro! It is not meaningless, education and learning is never meaningless. Your doing great and I love the videos! 😄
I was expecting a tie-in to your previous video regarding HP as a function of torque ( T x RPM / 5252 ), or at least converted radians. You know how much your audience loves MATH, MATH, and more MATH!
180lbs*12ft= 2160ft lbs*2.5/5252= 1.028179741hp.. that's before watt rounded
We've been using kW to describe engine power for quite a while in Australia.
We also use kW in most European countries. I'm from Estonia and we never talk about horsepower here, only kW.
It's mostly just the US and UK that use horsepower.
In german speaking countries we also use hp most of the time, if it's not for engineering purposes
@@lorenzlammerhuber2661 Kw is always listed but nobody really uses it
@@chrismannik In Poland we officially use kW but in everyday life we mostly talk about HP
I bet Watt was able to convince a lot of people to buy his product with this method. The rounding makes it easy to convince people it's not math trickery, but can actually replace a horse.
Hi I would like to see you do a video on the difference between "Continuous Shaft Horsepower" used for diesel engines and "Peak Horsepower" used for automotive engines. Thanks for all the interesting videos!
My microwave has an impressive 2.4 horse power
Hence it would take 2.4 napkin horses to run it
'murican or yuropean?
Still more than stock Miata...
my eletric shower has 10 CV
I approve of this. Make The Watt Great Again.
Man you are great. Thanks for all your excellent explanations
Thank you all so much for watt-ching :)
3:28 who knew a screeching sound from the marker could be so physically painful
We know this since 'Jaws'
Makes my ears hurt
What is kgf?
The unit of force in SI is Newton (N = kg*m/s^2).
kgf is a common metric unit, just not SI. I use it all the time in my job as an aerospace engineer, but I do convert to N for calculations.
I think he meant kg * g = 9,81kgm/s^2
Great and smacky explanation...hats off
I just read about Horsepower in my science book it's some thing easy to understand and thank you so much for ur great explain.
I kind of knew all of this, just through observation in life. But it was really nice to see it all shown in a structured format. Fantastic video!
Me studying engineering and hearing about "kilogram force" for the first time in my life. Why not use Newton, unit of force? Kg*m/s^2.
Because this channel is aimed at laymen (see "Engineering Explained" as name) who are not familiar with what a Newton is.
to be fair, I do think the logic of the argument he's making here makes more sense instead of introducing more units. I think he could have mentioned what a Newton was and still broke it down the same way, but keeping everything at absolute base units makes sense too.
@@KentRodgman Newton is base unit. It is 1kg*1m/1s^2. Kilogram force is 1kg*9,81m/s^2. [N] is used to measure force in every country that uses metric units. Nobody, I repeat, NOBODY is using kilogram force.
@@gameboyterrorysta6307 yeah but in the video he does multiply by g to get his referred kilogram force, he is in no way saying it's 1 to 1, he has kg*g in his formula.. I know that nobody uses it this way, my point is if he's trying to paint a trail for someone to follow that is totally new to this, it makes some sense to keep everything in base units. A base unit is the unit which is measured against a standard, and cannot be broken down into other things. While we refer to Newton in force for convenience, it's base units are kg, m and s. This is just a method he's chosen to illustrate a point and follow a logic path, in no way is he saying we should be using kilogram force as a standard measurement, that is a Newton.
@@xopelvi2796
This might be me not knowing how education outside Germany works, but not familiar with Newton? It's a basic unit that students get familiar with in their first year of physics, and everyone over the age of 12 will have learnt it.
This was a fantastic explanation, thank you so much!
Great video. There are already a number of countries that use kW to measure power and hp to kW has a nice conversion factor of 0.75.
I like the word ‘horse’ being common in car talk, even if it’s in a goofy unit.
Good to know what you like🙄
I think you could call it Turkey Farts, as long as everyone knows what it represents, it accomplishes the same thing.
The main provider of measurable power before engines was the horse.
bring your horse to a car meet up
I'd just wish he'd considered elephants as the primary mover instead of horses.
There's a lot of confusion regarding kW vs kWh ( power vs storage )
Yep, he should do a video clearing the misconceptions about kW and kWh.
Power vs energy. The energy capacity of storage batteries is measured in kWh, the rate at which the energy is transferred is power.
Its pretty easy, really.
100kWh - means you can power 100kW motor for an hour. (assuming 100% COP)
kwh is a silly unit. Joule is what you are after.
@@MaximKilligan yeah, the top trim Tesla S would have 360 Megajoule battery. Sounds cool :)
I think the amount of work the horse can do all day was quite consistent and well known. My Grandfather told me this 40 years ago and the story matches yours. As a human we can produce more than one horse power, i.e. 2 - 3 hp when running up stairs i.e. 2 - 3kw (1hp about 746W). But we can only produce between 1/6 and 1/4 sustained - which sounds reasonable.
Fantastic explanation!
America & Europe: **messing around with archaic units of power based on imaginary horses**
Australia: "Hey you know we already have a SI unit for power right?"
In Europe it's both.
Same for here in South Africa. Kw for days
I was always annoyed when we would use kW, but now I only feel smarter
Watts are official power units in most of countries in Europe. I have 93kw written in my car's registration papers for example.
In Germany the official units are also SI. So for cars they must print the kW but are free to also print the PS. PS is only used for customers.
My miata thanks you! Also I see an engine cutaway and I smash like!! Also also metric!!!!!!!
I'm glad my 2 favorite car youtuber are such great friends
I started to watch him originally because I'm just a nerd, but keep watching to practice metric conversion. I really am a nerd...
Besides I love metric, my Impala's power stated as 857554.852 watts, sounds so much more impressive than 1150 hp. Well, "had" is what I should say, it's hard to always keep a horse herd that large following suggested driving inputs. Instead of, for sake of arguments, not ripping out a rear spring mount, before gleefully driving into a power pole and 6 trees.
@@Nipplator99999999999 your impala has 857kw then...
I watched this video to see whether or not you'd make a "Watt" pun. You did not disappoint 😄 also, great explanation on power. Thanks for another top-quality video
@@TheFranpito you miss the point, I can't break HP down to 85k dog power. A full load of BS is spread out by two bored guys over their cars. Popping open dump cut-outs (ran 6 silencer mufflers normally to savior blues& wes purging NO2, and a nice big number, like 857554.852 watts isn't familiar to a lot of people, all give somebody a lot of distractions right before staging.
Listening to this as i fall asleep at 1 o'clock in the morning with my eyes closed and when he opened the marker at 3:27 scared the living crap out of me.
Your videos have rekindled my interest in engineering and physics
" *Watt* if there was a unit that equalled 1kg•(m^2)/(s^3)?"
I loved that bit 👍😂
Super simple as 123 ... 1^2/3
An acre is an area of one furlong(220 yds) by one chain (22 yds). A furlong was how long the fields were because fields were plowed by oxen and they needed to rest so they made the fields that long because thats how long the ox could plow before a rest. then they turned around and went back the other way. One chain wide was how much one man with one ox could plow in one day. One acre.
Also there are eight furlong in one mile. If you're good at math you'll see there are 640 acres in a square mile. This was all established by the Anglo-Saxons a long time ago. There's just something romantic about the old ways of measuring and if it ain't broke, why fix it?
Quick, what's the area of a rectangle that is 11'5 5/16" by 25' 8 7/32"?
@@greentjmtl 37’ 1 17/32”; but then again, the only issue I have with Metric is that it is Decimal, neither Dozenal nor Hexadecimal.
EDIT ; completely botched the actual operation!
276’ 5 301/512” is the best I could get off the top of my head, if we’re going for precision (and even if that is technically correct, it’s not recorded correctly. I’m not a machinist so I’m not familiar with thous)
279’ 2 7/32” is the best I could get going for accuracy in a, for lack of a better term, scientific sense.
286’ in a realistic situation.
293.02777’ is the best calculated answer I could get to this question.
Out of curiosity, I tried to convert the problem from Imperial to Metric by rounding the fractions and reducing to inches (just to check against the accuracy of these answers), but the result I got was so radically different from the other three answers that I’m unsure of the actual answer: 272231.7136 cm or 8931.667 sq ft.
My math skills aren’t particularly great to begin with, and they’re very rusty. I know this is more like missing the forest for the trees to your comment, but I wanted the practice.
Following your reasoning we should use oxen to plough fields.
@@greentjmtl in my 56 years I’ve never had to solve such a problem other then at school.
@@dinky9216 don’t be silly.
The best thing about kW is that it's easily transferrable to the electric cars as W/kW/MW are used so often in electrical contexts
So true!
The ending was epic, felt like an ending of a Monthy Python movie
I grew up around a lot of those grind mills, and that force to move it sounds about right for 12' 2 story stone disk grind mills.
TL;DW: American horses are stronger than European horses
Because 'Murica!
obviously...🤣🐴🇺🇸
Oh I see. Suddenly all this hate makes sense
Lol pretty much
Americans are fatter so they need slightly larger horses
You do a great job explaining things well spoken
This guy's videos are just outstanding!
Majority of Europe (also other countries, such as Australia) use kW as a standard. For example, power is written in kW in car documents, if someone talks about car power, they say it in kW and so on.
Not really the case in Italy, some documents are written in kW but when you're talking about car power nobody ever uses kW
@@andreaurru4990 that's true, I've never encountered anyone in Europe who uses kW to measure power output of a car
My experience in germany is that official numbers are usually stating both PS and KW.
But people still talk about PS because thats what advertised and what the media uses.
I live in Lithuania where everyone use kW, so I thought that it is standard in EU. Well, you live and you learn.
Thanks so much for WATTching. It helps out a ton
Thank You for the video.Its great.
Your demonstration is brillant, thank you! I think we still use this unit because it sounds romantically that cars are like iron horses, and also because… the same engine has more horses that kilowatts. I think I remember one HP is equal to 780W, not sure anymore.
1 horsepower equals 745.6 watts, it's on the whiteboard!