1. What is the Speed Adjustment Formula?

The speed adjustment formula calculates how a boat's speed is affected by additional weight. It provides a more accurate assessment of actual speed performance under different loading conditions.

2. How Does the Calculator Work?

The calculator uses the speed adjustment formula:

Where:

• Base speed — The boat's speed without additional weight (knots)
• Weight factor — The ratio of additional weight to the boat's base weight (decimal)

Explanation: The formula accounts for the non-linear relationship between added weight and speed reduction, with greater weight having a diminishing effect on speed reduction.

3. Importance of Speed Adjustment

Details: Accurate speed estimation is crucial for voyage planning, fuel consumption calculations, and performance optimization under different loading conditions.

4. Using the Calculator

Tips: Enter base speed in knots and weight factor as a decimal (e.g., 0.25 for 25% additional weight). All values must be valid (speed > 0, weight factor ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: How is the weight factor determined?
A: The weight factor is calculated as the ratio of additional weight to the boat's base weight (additional weight / base weight).

Q2: What is a typical weight factor range?
A: Common values range from 0 (no additional weight) to 0.5 (50% additional weight), though this varies by boat type and loading.

Q3: Does this account for different weight distributions?
A: No, this formula assumes the additional weight is evenly distributed. Uneven distribution may affect actual performance differently.

Q4: How accurate is this formula?
A: It provides a good estimate for displacement hulls but may be less accurate for planing hulls at higher speeds.

Q5: Can this be used for other vehicles?
A: The principle applies generally, but specific coefficients may vary for different vehicle types.