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Torque Formula:
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The torque formula calculates the rotational force produced by an engine based on its horsepower and RPM. Torque represents the twisting force that causes rotation and is a crucial parameter in automotive and mechanical engineering.
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, so 550 × 60 ÷ 2π ≈ 5252.
Details: Torque calculation is essential for understanding engine performance, vehicle acceleration, towing capacity, and overall mechanical efficiency. It helps in engine design, transmission selection, and performance optimization.
Tips: Enter horsepower and RPM values. Both values must be positive numbers. The calculator will compute the torque in pound-feet (lb-ft).
Q1: Why is 5252 used in the formula?
A: 5252 is a constant derived from the definition of horsepower (1 HP = 550 ft-lb/s) and the conversion between rotational speed and linear speed.
Q2: What is the relationship between torque and horsepower?
A: Horsepower is a function of torque and RPM. At 5252 RPM, horsepower and torque are numerically equal. Below this RPM, torque is higher than HP; above it, HP is higher than torque.
Q3: What are typical torque values for different engines?
A: Small car engines: 100-200 lb-ft, performance cars: 200-500 lb-ft, diesel trucks: 400-1000+ lb-ft. Values vary significantly by engine type and application.
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: How does torque affect vehicle performance?
A: Higher torque generally means better acceleration and towing capability. Torque at lower RPMs is particularly important for everyday driving and heavy-duty applications.