Engineering Information
Horsepower & Torque
One Horsepower (HP) = 33,000 foot pounds of work done in one minute. Note that three factors are involved:
| Distance - | in Feet |
| Force (Push or Pull) - | in Pounds |
| Time - | in Minutes |
Putting it another way, one HP is equivalent to raising 33,000 pounds, one foot in one minute. Any amount of horsepower can be determined by the following formula:
|
HP = |
L (Load in pounds) x Feet per minute 33,000 |
To determine the relationship between horsepower and torque let:
| HP | = Horsepower | |
| T | = Torque, in foot-pounds | |
| t | = torque, in inch-pounds | |
| N | = R.P.M. (Revolutions per minute) |
|
Then, one HP = |
A Torque Load (Twisting force) of 63,025 inch pounds, turning 1 revolution in 1 minute |
Therefore horsepower is:
|
HP = |
t x N 63,025 |
or |
T x N 5250 |
and torque is:
|
t = |
63,025 x HP N |
or T = | 5250 x HP N |
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