You've never ridden a horse?

Actually we use kw in europe alongside hp. And when you are ordering parts, they always ask you how many kw is your engine

Boats that take outboard engines routinely have both HP and KW stamped on their manufacturer plate, so KW is not unknown in the boating world....

I use hp and nm because they are more accurate

In Italy your car's registration paperwork has the car's power expressed in Kw, and every document states power in Kw ;)

Watt invented the horsepower unit... The irony is still fresh years after learning it in school.

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.

What about BHP - break horse power - seen it in UK magazines like "practical classics". What's that about?

@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

Oh man the light bulb is such a bad example to use....and a CF bulb at that. I guess it's the best of what there is to relate to.

So one kw is a Belgian draft horse? Or a stallion??

A little known historic fact is, that the unit 'Watt' was not named after James Watt himself, but instead was named after his paternal grandmother. If you want to find out more about that, just google 'wat grandma' :-)

I think it was just a prank and we all took it seriously

Agricultural tractors outside the US use kW as their power rating.

We use Kilowatts for engines here in Australia, though it is also acceptable to use HP or BHP, but officially, it is Kw. And it does make much more sense. Horses are not factory made die cast replicants, each the same as the last, they're living breathing creatures, and there's as much variation as with people. A Shetland Pony is not going to have as power as an average horse, like a Cutting horse, or Thoroughbred or Saddler, a Danish Drum Horse or a Clydesdale is going to have more, and outliers, like the legendary early 20th century race horse, Phar Lap, are going to be freaks worth three horses. Ok, we can take an average, but what if you live in a world where there is NOT the average? What if you're Icelandic and only know your local long haired shaggy little Icelandic Ponies? What if you're Turkmeni and only know Turkomans? A hundred horse power to Halfjur is not going to sound that impressive, but to Murgunhri it'll sound like you're lying, nothing can be that powerful. OK, we have better communication today, and so people kind of know, it's established... and at least Watt had a reason... well a better reason than whichever English King Edward it was that decided to make a system of measures of three dried barley corns.... but how could you stick with it these days? Kw integrate in to the metric system, and the metric system is scaled to the planet, indexed to the speed the of light. In other words, it's based in the reality of our physical universe. Horse power is based on Watt having to communicate with people who, for the most part, assumed anything not yet explained, was the work of God or Satan, and put Cocaine and Opiates in baby food. Just saying.

nonsense brilliantly explained. Watt using HP to define Watt himself. a horse is a horse of course, or what?

Here's what I don't get: Does horsepower directly relate to acceleration? It seems like torque would actually tell you how fast you could accelerate because its the actual force you're accelerating the car with, F=ma. Tell me if this is correct: Two engines, same amount of torque over their operating range, but the NA one has twice the horsepower of the turbo one. Wouldn't they be capable of the same acceleration, just the NA will be at twice the RPM?

11:50 i just lost control on myself and laughed as loud as i can when you said "one horse could have more than 1 horse power".

The thing is, when we look at the technical specs of a new car, we don't really care what its power output means in engineering terms. We just need to know how it compares to other cars that we can relate to. For most people the power of their engines has no absolute meaning, it only has a relative one - i.e. their own car vs. other cars. And for this purpose horsepower is perfectly adequate. Watts and kilowatts make perfect sense in engineering, but not so much in real life. Not for the average Joe anyway. If you told me that my car had a maximum power output of 333 kW, that would mean absolutely nothing to me, whereas 450 HP tells me that it's faster than my buddy's 400 HP, and noticeably slower than a 600 HP Ferrari - which at the end of the day is what I actually want to know.

I like abstract units of measurement. Trade secrets and all that stuff.

I don't care if it makes no sense this is America and we're sticking with horsepower. Plus it actually does make sense we know what a 300 horsepower or a 400 horsepower engine can do.

The hypocrisy of him continuing using horsepower after he admitted that it made no sense. He want it changed but fights the change by sticking to tradition, so irrational.

Apparently 1 horse can actually produce around 15hp. A typical human can produce around 1hp. The original base unit was hopelessly underestimated.

Redtooth 75

14 dager siden

An average horse can output 1 horsepower continuously throughout the day, but can produce about 15 horsepower for a short period of time.

this means that this whole mumbo jumbo was done on an imaginary no of what a horse can pull, different horse can pull different so it was a averaged no of 180

Actually here in Europe we use kW, when talking about cars, nobody uses here hp or ps. Exept Finnish, they use hp's for some reason 😀

Engine Horsepower Rating is ALSO different because of different standards for measuring it. Some standards DELETE the power consumption of accessory drives (water pumps, hydraulic pumps, fuel pumps etc). Some Standards take actual power output of Flywheel. And do not give 'credits' for accessory drive power consumption.

Horsepower is fun tho

I'm surprised to learn that CV is Italian. I was always told the Renault CV2 literally meant 2 horse power.

I never knew there was a metric horsepower! I'm English and I always use 745.7 in my calculations (actually I ususlly just use 750 which is close enough!) PS I like the horsepower as a unit of power - it's relatable to human experience like feet, incense and yards.

Thanks for watting.

It would have been useful to discuss the Joule and the Newton on the way to the big reveal.

Conclusion: we can use horsepower to describe lightbulb power. I will now describe my computer in terms of horsepower.

Now do a video on when to use pound-feet vs foot-pounds.

My God Soo booooriing

My LS1 Trans Am was listed at 300hp and blew everything away.

No ones going to talk about his horse drawing ?

I allways thought horsepower was weird. Somtimes some cars are faster with less. Murica make me angy.

A horse has 2.5-10 horsepower I know it doesn´t make sense but it is what it is

It is funny that you say American use units that dont make any since, but the whole video is about how other countries use the same unit but convert it wrong.

Watt are you talking about???

The US are just to big and lazy to convert to anything. They still think the world should adapt to them. The only other country that officially uses the imperial system is Liberia. Liberia is what their president would call a shithole country.

Watt an informative video

Conclusion: freedom units is basically napkin maths

As an engineer I'm getting scared seeing someone using units and formula symbols in one equation. And what the heck is "lbf" and "kgf"? I mean I get it, but is this a real thing in the US? I'm a metric engineer in automotive in Germany and I have never ever came across that. But thank you for that explanation where a horsepower actually comes from. I'll implement this in my lectures.

Theo Zimmermann

14 dager siden

@Redtooth 75 yeah, when I said "I get it", then I meant that I get it... but thanks for that unnecessary explanation. I just don't understand why the US hates the metric system so much. Why not using N as the rest of the world. There's no need to measure things in bold eagles per square freedom.

Redtooth 75

14 dager siden

Lbf is pounds-force, it is used to signify that pounds is being used as a unit of force and not mass. One pound (mass) exerts one pound-force due to gravity. Its the same for kgf, although the standard unit is newtons. One kgf is the force 1 kg mass exerts due to earth's gravity, 9.807 newtons.

Okay so how exactly do you test the kilowatts of a car?

Who says it was back of the napkin maths? He could've carried out experiments to figure out the average power of a horse and we might not know about them

Fun fact. The average horse can put out up to 15 horsepower. Humans can output up to about 5 horsepower.

I'll start telling people that my light bulbs are 20 milihorse power

I'm sorry but "kilograms force" makes my ears bleed.

You need better mike. You're welcome.

My car has tigerpower.

Isn’t the Murican HP actually the Imperial HP?

Well yeah, like all american outdated units the hp should die. 94% of the earth's population use metric. 😏

Is Just me that thinks It, or the imperic system is actually ridiculous?

awesome ideas, how-to and delivery. 1 *attaboy* for your sir. not 5.73 attaboys.. just 1 ; )

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!

None of this matters at all anyways.

as usual... he's full of gobbledygook.

Was this engine lifting weight tested

What is work overtime? Something I will not do

Why the US doesn’t go metric says it all, weird indeed, suffer stupids.

L Barbato

Måned siden

@Richard Bossman Aus converted to metric back round 1972. As I started an engineering trade that year it was a major concern for me that I knew nothing about the metric system. However, in my first calculation lesson of 1 1/2 hrs I learnt the whole metric system, it’s that easy, it made my life so much easier. All measuring tools, engineering drawings etc etc we’re slowly phased out when requiring replacing / renewing not a total change over night, phasing out. The imperial system is caveman stuff my friend.

Richard Bossman

Måned siden

When you are the best you don’t have to be like the rest. That aside you have no idea how much it would actually cost to convert the U.S. over to metric.

in persian we call it اسب بخار meaning steam horse, from steam engine and horse power.

*I base all mu car purchases off how much flour they can mill. Gotta have my bread*

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.

Relax dude..haha

1:11 did anyone else think 3 inch plumbing flashing for roofing?

Just remember, there are two types of countries; those that use the metric system and the one that has landed a man on the moon and safely returned him (multiple times). Ha! That being said I wish the US would go to the metric system. Easier maths.

Drew Northup

2 dager siden

When we sent men to the moon we did it in metric. Everything was converted to/from "customary" USA units for interaction with the astronauts, but the computers used metric internally.

About 6 months ago I discovered that there was something fishy about the horsepower unit. I was trying to figure out a way to solve it but no one I know thinks math is actually fun. Everyone thought I was crazy. I’m so glad to see someone is Shedding light on this One thing that does not make sense to me is how come the horsepower and torque always cross at 5252. I understand the math but it does not seem realistic. For example if a diesel engine cannot rev to 5252 then the cross cannot show up so why should it be set in stone that a dino cross at 5252. I understand how a Dino works and that there are multiple kinds of dinos. I feel like instead of using one unit to find another unit we should find both units independently I wish I knew more people with the hobby of questioning the things we use I need to do more research

Redtooth 75

Måned siden

Horsepower cannot be measured directly, only calculated. The formula when torque is in ft*lb is (torque X RPM)/5252. When the rpm is equal to 5252 horsepower and torque have the same value. If an engine cant rev to 5252 rpm, torque and horsepower will never be equal to each other. The lines crossing is meaningless, its just because of the units used. If you measured torque, speed, or power with different units then the lines would cross at different points.

Very useful video, i switched to metric and now my car has 5 more horsepower 👍

I want him so hard to start swearing

No wonder motorcycles are fast. They're like the same size as a horse, weigh more, but have more hp

Don't worry man. If I ever make my car (hopefully), I'll name the power by the watt

So in conclusion, we should start referring to light bulbs by their horsepower?

Actually, here in Europe, you get often description of power for engines in both HP and kW side by side.

Whenever I hear hp, I do quick mental math to work out the Watts cuz it's just so intuitivell

1 horse power 5 men 3,000,000 ants 5 horses to 1 elephant

No.

But Jason, how many horses can I replace with my 110kW car?

Personally i am so familiar with rating of power of cars in killowats that when somebody says it in Horsepower, i need to calculate it back to kW to know what the hell they are talking about.

I guess it was the force needed to turn the big heavy millstone that the wheel was attached to. This may be related to a standard size of millstone used at the time. Just a guess.

My car has 112,750 Ft. Lbs. A second of power

I think the pit pony was pulling up a load from a mine. Not spinning a stone. So 180lb was measured weight.

R . O . A . S . T . E . D .

Me, a European: What the heck is kgf? We don't do that here. We use N for Newton. Remember, metric is easy. You just need to forget your traumatic experiences of living in America and let your mind be at ease.

How many kilowatts does the 812 Superfast have then?

Actually in ur diagram the “horse” is pulling the weight from the saddle horn. Oh hahaha no... the weight must be tied to the tail

Power to weight ratio is a more accurate depiction of how a car will accelerate a car could have 300hp but weigh 3 tonnes yet a 100hp car that weighs 1 tonne will accelerate very similar. I think. May be wrong but that’s how I have always worked it out when deciding what cars to buy. 200hp per tonne is the sweet starting point of fun in my opinion

Great and smacky explanation...hats off

k 🙂..

Next video, Minicar drive test..? Lol

Quick snippet out of wikipedia - "Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 2010, the use of horsepower in the EU is permitted only as a supplementary unit.[3]" also apparently usain bolt produced a maximum of 3.5hp when setting his 100 metre dash record.

I hope he trademarked his logo, volvo's rear lights resemble his logo.

Killerwasps are the only way to measure my engine. It will destroy ponies.

I heard on Mars you can only use the hamsterpower unit.

Isnt power equals force multiplied by velocity? Force multiplied by distance is work done.

You could make engines express their output in KW but even in Europe, some people are still confused by what that means. Interestingly, people better understand the kilonewtons (kN) used to measure engine thrust from jet engines and rockets.

So basically... South Africa's math makes more sense 🤣 (we use metric and base all our cars on KW for eg. A 120hp car is ~88kw)

Who cares how many horsepower a car is if it is a donkey driving it.

Would if it was called Squirrel Might? Or Whale Thrust? We should switch to CowPower. 🐄

why is he using force as a unit force is not a unit newton is a unit force

Redtooth 75

Måned siden

So if kgf