1. What is the RC Boat Speed Equation?

The RC boat speed equation estimates the theoretical maximum speed of a radio-controlled boat based on motor characteristics and propulsion system parameters.

2. How Does the Calculator Work?

The calculator uses the RC boat speed equation:

Where:

• \( kv \) — Motor velocity constant (rpm per volt)
• \( voltage \) — Battery voltage (V)
• \( prop\_pitch \) — Propeller pitch (inches per revolution)
• \( gear\_ratio \) — Gear reduction ratio (dimensionless)

Explanation: The equation calculates theoretical speed by determining how fast the propeller moves through the water based on motor RPM and propeller characteristics.

3. Importance of Speed Calculation

Details: Accurate speed estimation helps in selecting appropriate motor, battery, and propeller combinations for desired performance characteristics.

4. Using the Calculator

Tips: Enter motor KV rating, battery voltage, propeller pitch, and gear ratio. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this the actual speed I'll get?
A: This is theoretical maximum speed. Actual speed will be lower due to factors like drag, efficiency losses, and water conditions.

Q2: What are typical KV values for RC boat motors?
A: Typically range from 1000-3000 rpm/V for brushed motors, and higher for brushless motors.

Q3: How does propeller pitch affect speed?
A: Higher pitch propellers move more water per revolution, potentially increasing speed but requiring more power.

Q4: What if I have direct drive (no gear ratio)?
A: Use 1 for gear ratio in direct drive systems.

Q5: How can I increase my boat's speed?
A: Options include higher voltage battery, higher KV motor, or larger pitch propeller, within system limits.