1. What is the RC Boat Speed Equation?

The RC boat speed equation estimates the speed of a radio-controlled boat based on motor RPM, propeller characteristics, and system efficiency. It provides a theoretical maximum speed under ideal conditions.

2. How Does the Calculator Work?

The calculator uses the basic speed equation:

Where:

• \( RPM \) — Motor revolutions per minute
• \( prop\_factor \) — Propeller pitch factor (inches/revolution for mph or cm/revolution for km/h)
• \( efficiency \) — System efficiency factor (0-1, typically 0.7-0.9)

Explanation: The equation accounts for the propeller's theoretical travel per revolution, reduced by system inefficiencies.

3. Importance of Speed Calculation

Details: Accurate speed estimation helps in propeller selection, motor tuning, and performance prediction for RC boats.

4. Using the Calculator

Tips: Enter motor RPM, propeller factor (typically 0.0005-0.002 for mph), and estimated efficiency (default 0.85). Select desired output units.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my propeller factor?
A: The factor is roughly the propeller pitch divided by 1056 for mph or 1666 for km/h, but varies by design.

Q2: What affects system efficiency?
A: Factors include water resistance, hull design, motor efficiency, drivetrain losses, and battery condition.

Q3: Why is actual speed often lower than calculated?
A: Real-world factors like water conditions, hull drag, and battery voltage drop reduce actual speed.

Q4: How can I improve my RC boat's speed?
A: Consider higher pitch propellers, more efficient motors, reduced weight, or improved hull hydrodynamics.

Q5: Is this calculation suitable for all RC boats?
A: It works best for propeller-driven surface boats. Jet-driven or submarine RC vehicles require different calculations.