2006-09-20 06:10:08 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Torque is a force in a rotational motion. The best example I can give you is when you open a door. If you push a door open near its hinges, it's hard as hell to move. If you push the door open at the opposite end of where the hinges are located, it's far easier. The reason being is that you have to push the door for a longer period of time (if you put a pencil on the door by the hinges and one on the opposite side, you will see the circle drawn on the ground is far larger on the opposite side of the hinges). The technical reason is that you have a longer lever arm.
Yes, torque at a higher RPM is far better than torque at lower RPM's. If one engine produced 100 ft/lbs of toque at 1000 RPM's while another engine produced 100 ft/lbs of torque at 2000 RPM's, the latter would have twice the performance of the fore. Here's why, I could use a gear ratio of 2:1 to reduce the 2000 RPM's of the second engine to equal the same 1000 RPM output of the first engine. Now the first engine has an output 100 ft/lbs of torque, but the second engine has an output of 200 ft/lbs of torque (by reducing the engines RPM in half, we doubled it's torque by a factor 2). So in conclusion, there's engine torque and gear torque, by producing engine torque at higher RPM's we can utilize gear torque.
2006-09-20 07:22:00 · answer #1 · answered by your_atlanta_man 2 · 1⤊ 0⤋
Higher rpm does not equal higher torque. Anyone that drives a race car knows this. Your vehicle will have a maximum torque at a specific rpm. See this link for an example of a torque curve.
http://www.dur.ac.uk/r.g.bower/PoM/pom/node11.html
Some of the above answers give the correct formula for calculating torque manually. To find out the torque your car outputs at the wheels you will need to put it on a dyno. This will give you a torque curve so you will also find out the optimum rpm.
To put it in laymans terms. Horse power is how fast you hit the wall. Torque is how far you take it with you.
2006-09-20 07:50:21 · answer #2 · answered by Kaedence 2 · 0⤊ 0⤋
Torque is the product of the force times the distance to the pivot point times the sine of the angle between them.
Increasing the RPM will increase the Horsepower:
Horsepower = Torque x RPM / 5252
2006-09-20 06:27:57 · answer #3 · answered by Sqdr 3 · 1⤊ 0⤋
Torque is your push. When you hit the gas it gets up and goes, instead of a slow crawl to get faster. The higher the rpm the better the torque.
2006-09-20 06:18:52 · answer #4 · answered by jdecorse25 5 · 0⤊ 1⤋
rpm.depends on what machine you are asking about.the gearing and transmission method matters.some pumps are less efficient at higher rpm
2006-09-20 06:19:51 · answer #5 · answered by denny 3 · 0⤊ 0⤋