Scientific ratio of winch force and ship weight
Electric Winch Basic Calculation Formula
The required force of the winch needs to cover the following resistance (refer to "Slipway Process Design")
Slope ship transfer: force = (ship weight + equipment weight) × sinα (slope angle) + friction resistance + wind resistance
Water positioning: force = starting inertia force + wind resistance (1000kgf/m² wind-receiving area) + water resistance (related to water flow speed)
Example: If the ship weighs 50 tons and the slope angle is 10°, the basic force requirement for land ship transfer is about 8.7 tons, and water positioning needs to consider the influence of wind and waves.
Experience ratio recommendation
General scenario: The winch force is recommended to be 1.5~2 times the ship weight (consistent with the selection logic of off-road vehicles).
Special working conditions:
Salt water environment: add a 20% margin to cope with performance degradation caused by corrosion.
