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Torque Formula:
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The torque formula \( T = \frac{HP \times 5252}{RPM} \) calculates torque from horsepower and RPM. This formula is fundamental in mechanical engineering and automotive applications for determining rotational force.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 comes from the fact that one horsepower is defined as 550 foot-pounds per second, and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).
Details: Torque calculation is essential for engine performance analysis, vehicle dynamics, mechanical design, and understanding the relationship between power and rotational force in various mechanical systems.
Tips: Enter horsepower in hp and RPM in revolutions per minute. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is 5252 used in the formula?
A: 5252 is a conversion constant derived from the definition of horsepower (550 ft-lb/sec) and the relationship between rotational speed and time (60 seconds/minute ÷ 2π radians).
Q2: What are typical torque values for engines?
A: Torque values vary widely by engine type. Small car engines might produce 100-200 lb-ft, while heavy-duty diesel engines can produce over 1000 lb-ft of torque.
Q3: Does torque change with RPM?
A: Yes, torque typically varies across the RPM range. Most engines have a torque curve that peaks at specific RPMs, which is why horsepower continues to increase even after torque begins to drop.
Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery, including electric motors, though electric motors often have different torque characteristics than internal combustion engines.
Q5: What's the difference between torque and horsepower?
A: Torque is a measure of rotational force, while horsepower is a measure of work done over time. Horsepower = (Torque × RPM) ÷ 5252, showing their direct relationship.