HORSEPOWER VS TORQUE SIMPLEST EXPLANATION

Very good, although missing the explanation of lower gearing producing lower top speed

Horsepower is how many times the torque of the engine is applied to the wheels every second. This was the magic line that solved everything.

I think it is important to show the fact that the lower-torque car has a higher top speed than the modified, higher-torque car. The lack of this clarification at the end might make someone wonder why any car has low torque if there seems to be no downside to raising it with gears or whatnot.

Good explanation! It starts to make sense once you realize a gear is simply a series of levers arranged in an array around the gear's axis. Gears are "continuous levers".

My third year studying mechanical engineering and this the best most concise explanation of torque I've seen.

I still find the explanation for Mustang owners the simplest: "horsepower is how fast you hit the crowd when pulling at cars and coffee, torque is how many bodies you can drag along before their weight forces your car to stop"

I have never fully understood the difference between torque, horsepower and how gears work until i watched this. Thank you!

After showing the wrench demonstration I think they should compare that to riding a bicycle at high speeds since it's something you can feel and understand as you're practically the engine in a bicycle, unlike in a car. In a higher gear when you start pedalling, the wheels are applying more force but are turning slower and thus the bike is pushing harder forward, but consequently you can't pedal as fast. If a gear gives you more force, it must give you less speed and vice versa.

I find it helpful to recognize they are different units of measure. Torque is a static measurement and HP has a time component.

It is very straightforward when using identical electric motors and the difference in torque is created in the transmission and the torque is applied constantly. It gets a lot more complex when talking about internal combustion engines. This is because torque is applied in increasing and diminishing pulses once every 2 revolutions. The torque measure is effectively a factor of the amount of explosive force created by combustion at a given speed multiplied by the mechanical advantage derived by crankshaft design which is a constant. Its main use is to indicate how easily the engine can move a static load, or typically heavy loads at low rpm, it does not tell you how much work can be done and at what rate. BHP on the other hand uses the torque figure multiplied by how many times that force is applied each second. Thus if you are interested in how fast it can make a car go for instance Car A producing 100NM of torque at 2000rpm would do the same amount of work as Car B producing 50NM at 4000rpm and in theory equally in performance. How that converts to actual performance in a car is complex as gearing and mechanical losses also come into play but the basic principle is true. The typical engine speed that produces the biggest bang is around 3000 - 4000rpm and that is the maximum torque figure, after that combustion efficiency increasingly diminishes as engine speed rises so at say 7000rpm where it is doing more work and creating higher BHP with a smaller bang and less torque. Race engines are typically capable of efficiency at higher rpm and that is their advantage in creating higher BHP and performance.

It would be interesting to explore the potential for an inverse square law with this. Where the weight and density of the gears, or the length of your wrench extender you add cause the resistance to be greater than the applied torque, making it difficult to turn the wheels, or the extender breaks halfway, etc.

Muito bem explicado! Obrigado pela aula! 🇧🇷

Great video and good explanation but I feel there is something missing here. From the video you get the expression that, with one gear setup, you get the highest torque, and the highest speed, which normally would not be the case. Power (kW) = Torque (N.m) x Speed (RPM) / 9.5488. To explain this, in a normal car you normaly start in first gear to have the maximum torque to get the car moving, but the speed is very limited. And once you are moving you switch to higher gears because you do not need the same torque, but you want higher speed. But the motor and the rest of the system is still the same

You can make a 10:1 lever and hang off of it to create 2000 ft lbs of torque, but try propelling a car with that. Horsepower is like torque per second, and if you have a shit ton of torque, but like 100 horsepower, you won’t be going very quick, but you will be able to move a heavy thing slowly.

Nice, but it would be nice to see a situation in which the unmodified car could out perform the modified one, as you described with the race car vs the truck on a race track.

Great demo; extra kudos for showing your experimental progression. Most folks wouldn't show the plowing thru the barrier and crashing, then securing/gluing the barrier, then adding rubber bands for traction. It's more entertaining when you 'show your work'.

Это хорошее объяснение работы КПП но никак не объяснение лошадиных сил и крутящего момента

Очень поверхностное объяснение, которое рассказывает, как работает коробка передач, но абсолютно не раскрывает разницу между двигателем легкового автомобиля и трактора

Hello, I loved how you increased the coefficient of friction with a little rubber band. It would be a great demonstration to your average viewer, to demonstrate coefficient of friction. Explaining why two cars engaged in a tug of war contest can be manipulated by tires choice so that either one can win.

That experiment with the cars and a gearset being added to one of them, really blew my mind. That example is so simple and straight to the point without any intellectually self jerking explanation. Subbed.