Estimate bollard pull (in tons) from Brake Horse Power (BHP), a common rule of thumb is to use the following formula:
Bollard Pull (tons) ≈ BHP * 0.9 * (1.10 – 1.40) / 100
Kilowatts (kW) to Horsepower (HP) formula:
Multiply the power value in kW by 1.34102
Anchor swinging circle formula:
Number of shackles x 27.5(m) + length of ship(m) / 1852 = turning circle in NM
The wind force on a ship’s surface can be estimated using the following formula:
Wind Force (F) = 0.5 * ρ * A * V²
- Where:
- ρ is the air density (approximately 1.225 kg/m³ at sea level)
- A is the projected area of the ship’s surface exposed to the wind (in m²)
- V is the wind speed (in m/s)