1. What is the Motor Torque Formula?

The motor torque formula calculates the rotational force produced by an engine or motor. It relates horsepower (HP) and revolutions per minute (RPM) to determine torque output in pound-feet (lb-ft).

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (lb-ft)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute

Explanation: The constant 5252 is derived from the relationship between rotational speed, power, and torque. At 5252 RPM, horsepower and torque values are equal.

3. Importance of Torque Calculation

Details: Torque measurement is essential for evaluating engine performance, determining load capacity, selecting appropriate gearing, and understanding a vehicle's acceleration characteristics.

4. Using the Calculator

Tips: Enter horsepower and RPM values. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 is the RPM at which horsepower and torque are numerically equal, derived from the conversion between rotational units and power units.

Q2: What's the difference between horsepower and torque?
A: Torque is a measure of rotational force, while horsepower is a measure of work done over time (power). Horsepower = (Torque × RPM) / 5252.

Q3: How does torque affect vehicle performance?
A: Higher torque generally means better acceleration and towing capacity, particularly at lower RPMs.

Q4: Can this formula be used for electric motors?
A: Yes, the formula works for any rotational power system, though electric motors often have different torque characteristics across their RPM range.

Q5: What are typical torque values for different engines?
A: Torque varies widely: small car engines might produce 100-200 lb-ft, while diesel truck engines can produce 500-1000+ lb-ft.