1. What is the Power Equation?

The power equation relates torque and rotational speed (RPM) to calculate the mechanical power output of a motor. It's essential for evaluating RC motor performance and comparing different motors.

2. How Does the Calculator Work?

The calculator uses the power equation:

Where:

• \( Torque \) — Rotational force in Newton-meters (Nm)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 9.549 \) — Conversion factor (30/π) to convert to watts

Explanation: The equation shows that power increases with both torque and RPM. The constant 9.549 comes from unit conversion (60 seconds/minute divided by 2π radians/revolution).

3. Importance of Motor Performance Calculation

Details: Calculating motor power helps in selecting the right motor for your RC application, comparing motor efficiency, and predicting vehicle performance.

4. Using the Calculator

Tips: Enter torque in Nm and RPM in rev/min. Both values must be positive numbers. Typical RC motors range from 0.01-1 Nm torque and 1000-50,000 RPM.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9.549 used in the equation?
A: It's the conversion factor (30/π) that converts torque in Nm and speed in RPM to power in watts.

Q2: What are typical power outputs for RC motors?
A: Small RC motors might produce 10-100W, while larger ones can reach 1000W or more.

Q3: How does this relate to battery selection?
A: Motor power requirements help determine the needed battery capacity (mAh) and discharge rate (C rating).

Q4: Can I calculate torque if I know power and RPM?
A: Yes, rearrange the equation: Torque (Nm) = Power (W) × 9.549 / RPM.

Q5: What affects motor torque and RPM?
A: Voltage (increases both), load (reduces RPM), motor windings (affects torque/RPM balance), and gearing.