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Torque Formula:
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The torque calculation formula T = (HP × 5252) / RPM is used to determine the rotational force produced by an engine or motor. This formula establishes the relationship between horsepower, RPM, and torque in mechanical systems.
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 2π radians in one revolution.
Details: Torque calculation is essential for engineers and mechanics to understand engine performance, determine appropriate gearing ratios, and optimize mechanical systems for maximum efficiency and power delivery.
Tips: Enter horsepower and RPM values. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between horsepower (550 ft-lb/sec) and RPM (5252 = 550 × 60 ÷ 2π), making the units consistent for torque calculation.
Q2: What are typical torque values for different engines?
A: Torque values vary significantly by engine type. Small car engines might produce 100-200 lb-ft, while diesel truck engines can produce 800-1000+ lb-ft of torque.
Q3: How does torque relate to vehicle performance?
A: Torque determines a vehicle's acceleration and pulling power. Higher torque at lower RPMs generally means better low-end acceleration and towing capability.
Q4: Can this formula be used for electric motors?
A: Yes, the formula works for any rotational mechanical system, including electric motors, though electric motors often have different torque characteristics than 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.