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Torque Formula:
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Torque calculation from power and RPM is a fundamental mechanical engineering concept that determines the rotational force produced by an engine or motor. It's essential for understanding the performance characteristics of rotating machinery.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where 1 horsepower equals 550 foot-pounds per second and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).
Details: Accurate torque calculation is crucial for engine design, vehicle performance analysis, industrial machinery specification, and mechanical system optimization. It helps engineers determine the twisting force available for work.
Tips: Enter power in horsepower and RPM in revolutions per minute. 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 is derived from the definition of horsepower (550 ft-lb/sec) and the conversion between seconds and minutes (60 seconds/minute) and radians (2π radians/revolution).
Q2: What are typical torque values for different engines?
A: Typical values range from 100-200 lb-ft for small car engines to over 1,000 lb-ft for large diesel engines and industrial motors.
Q3: How does torque relate to vehicle performance?
A: Higher torque at lower RPM provides better acceleration and towing capacity, while high-RPM torque affects top speed and high-speed performance.
Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery, including electric motors, though power may need conversion from electrical units to mechanical horsepower.
Q5: What is the difference between torque and power?
A: Torque is the rotational force, while power is the rate at which work is done. Power = Torque × Angular Velocity, which is why they're mathematically related.