Rc Boat Prop Calculator

RC Boat Prop Equation:

\[ V = \frac{RPM \times PP \times (1 - \frac{PS}{100})}{GR \times 1056} \]

Engine RPM (RPM):

rev/min

Propeller Pitch (PP):

inches

Propeller Slip (PS):

Gear Ratio (GR):

dimensionless

Boat Speed (V):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the RC Boat Prop Calculator?

The RC Boat Prop Calculator estimates boat speed based on engine RPM, propeller pitch, propeller slip, and gear ratio. This calculation helps RC boat enthusiasts optimize their boat's performance by selecting the right propeller configuration.

2. How Does the Calculator Work?

The calculator uses the RC boat prop equation:

\[ V = \frac{RPM \times PP \times (1 - \frac{PS}{100})}{GR \times 1056} \]

Where:

\( V \) — Boat speed (mph)
\( RPM \) — Engine revolutions per minute (rev/min)
\( PP \) — Propeller pitch (inches)
\( PS \) — Propeller slip (%)
\( GR \) — Gear ratio (dimensionless)

Explanation: The equation calculates theoretical boat speed by accounting for propeller efficiency (through slip percentage) and gear reduction between the engine and propeller.

3. Importance of Propeller Calculations

Details: Accurate speed prediction is essential for RC boat performance tuning, propeller selection, and understanding how different configurations affect overall speed and efficiency.

4. Using the Calculator

Tips: Enter engine RPM, propeller pitch in inches, propeller slip as a percentage (typically 10-30% for RC boats), and gear ratio. All values must be positive numbers with slip between 0-100%.

5. Frequently Asked Questions (FAQ)

Q1: What is propeller slip?
A: Propeller slip is the difference between theoretical and actual propeller advance, expressed as a percentage. It accounts for water slippage and inefficiencies.

Q2: What is a typical gear ratio for RC boats?
A: Gear ratios typically range from 1.5:1 to 3:1, depending on the boat type and engine characteristics.

Q3: How accurate is this calculation?
A: This provides a theoretical maximum speed. Actual speed may vary due to hull design, water conditions, and other factors.

Q4: What propeller slip percentage should I use?
A: For RC boats, slip percentages typically range from 10% to 30%. Start with 15-20% for general calculations.

Q5: Can I use this for full-size boats?
A: While the principle is similar, full-size boat calculations may require additional factors and this calculator is optimized for RC applications.