Sailing Vessel Heeling Control via Dynamic Sail Adjustment
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Solution Overview
Problem
Traditional sailboats experience excessive heeling under heavy wind conditions, which can lead to capsizing and is often mitigated using heavy and costly devices with limited efficiency.
Innovation Solution
A sailing vessel design featuring a sail with a longitudinal axis perpendicular to its edge, coupled with floats and a sail-control system that adjusts the sail's angle using a pulley and handle system, along with foils to reduce hydrodynamic drag, allowing the vessel to balance aerodynamic and hydrodynamic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional heavy devices (ballasts, deep keels, crew displacement, loads, foils, lateral floats) are used to limit heeling, then heeling control is improved, but device weight, cost, and complexity increase
Solution Approach 1:
The patent employs a dynamic sail-control system with a pulley and handle that allows continuous adjustment of the sail's angle relative to the wind. This dynamic adjustment capability enables the vessel to maintain optimal sail angle and balance aerodynamic forces, controlling heeling without requiring heavy static ballasts or deep keels. The system transforms the approach from passive stability through weight to active stability through controlled movement and positioning.
2Stability of the object's composition
If traditional heavy devices (ballasts, deep keels, crew displacement, loads, foils, lateral floats) are used to limit heeling, then heeling control is improved, but device cost increases
Solution Approach 1:
The patent replaces expensive heavy stability devices with a lighter, more maneuverable system centered on a pulley and handle mechanism. This dynamic control system allows the vessel to achieve stability through operational flexibility rather than through costly heavy construction. The sail-control system provides an economical alternative to traditional heavy ballasts and deep keels by using mechanical advantage and continuous adjustability.
3Force
If the sail angle is not optimally adjusted, then aerodynamic efficiency is reduced, but heeling increases under heavy wind conditions
Solution Approach 1:
The patent implements a dynamic sail-control system with a pulley and handle that enables continuous adjustment of the sail's angle relative to the longitudinal axis. This allows the operator to optimize the sail angle in real-time based on wind conditions, maximizing aerodynamic efficiency while minimizing heeling. The system provides direct mechanical control over sail positioning, enabling precise balance between aerodynamic force generation and heeling control.
Solution Approach 2:
The patent changes the critical parameter of sail angle through the pulley and handle mechanism. By adjusting the length of the first line relative to the second line, the system varies the sail's angular position to optimize performance. This parameter adjustment allows the vessel to adapt to changing wind conditions, maintaining optimal aerodynamic efficiency while controlling heeling extent through controlled parameter variation rather than fixed design parameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly reduces heeling, enhancing stability and safety by maintaining optimal sail angle and reducing hydrodynamic drag, thereby preventing capsizing.
Implementation Method 1
a first float and a second float coupled to the first end of the first edge and configured to provide buoyancy to the sailing vessel
Implementation Method 2
during navigation, the wind exerts an aerodynamic force on the sail
Implementation Method 3
water exerts a hydrodynamic force on the third float, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to the longitudinal axis
Implementation Method 4
the first foil is configured to rotate along an axis in a water current
Data Source
AI summary
Embodiments described herein relate generally to a sailing vessel that can substantially obviate the heeling problem experienced by classical sailboats. During navigation, the sailing vessel is driven forward by an aerodynamic force exerted by wind on the sail, and balanced by a hydrodynamic force exerted by water on a float on the stern of the sailing vessel, the aerodynamic force and the hydrodynamic force being parallel or substantially parallel to a longitudinal axis of the sailing vessel.