The invention relates to a rig for sailing and windsurfing, consisting of a textile wing membrane and a guide and mounting structure. The rig uses the so-called vortex coil effect (also known as eddy reel effect). The basic principle of the leaflet geometry is the so-called "crab claws rig" modeled.
Table of Contents
1. Vortex coil effect-use rig for sailing surfboards
2. Description
3. State of the art, Historical overview and novelty.
4. State of science
5. State of the science, vortex coil phenomenology.
6. State of science, biology and technology.
7. Problem description.
8. Troubleshooting
9. Achievable benefits
10. Construction, structural design and mode of operation
11. Operation
Objectives and Topics
The work presents a novel rig design for sailing surfboards based on bionic principles, specifically utilizing the vortex coil effect to enhance aerodynamic efficiency by optimizing edge vortex behavior. It aims to transfer the geometric advantages of historical Polynesian crab claw sails to modern windsurfing equipment through a simplified, high-performance structural configuration.
- Aerodynamic optimization via vortex coil theory
- Bionic adaptation of the historical crab claw sail geometry
- Integration of advanced mast base and wing membrane mechanics
- Performance benefits in lift generation and induced drag reduction
- Technical feasibility for commercial windsurfing applications
Excerpt from the book
State of the science, vortex coil phenomenology.
After the wing theory the buoyancy flow around a wing depends on the circulation [Kutta Jankowski]. Superimposing at a flow body (with a two-dimensional model representation in the profile plane of the flow body), a translational and rotatory flow field, comes as a result of the circulation around this body to delay the flow on one side and to an acceleration of the flow on the other side. According to the Bernoulli equation, the acceleration results in a pressure reduction, the delay to a pressure increase, which is felt as a lifting force, in the case of a wing. For a being streamed, finite wing (wing section), the lift force is distributed over the elliptical lift-generating body.
As a result of the pressure gradient occurs at the physical end of the wing to flow around the wing edge. In the wake of wing tip flow (Kantenumströmung) now forms a compact vortex, which is described as induced by the pressure gradient edge vortex in the literature. The induced eddy edge binds a significant proportion of the applied for generating the lifting forces of the system energy. The vortex in the wake of a lift-generating wing is very stable. In flow studies of the wind tunnel but also by numerical flow simulations the fluid flow (Umströmungsgebaren) to be produced at the ends of buoyancy flow body can be made visible. Each induced by the buoyancy behavior of a surface of the wing vortex is ideally compact in its speed distribution in its cross section and forms a gradual rotatory remote box.
Summary of Chapters
Vortex coil effect-use rig for sailing surfboards: Introduces the patent application for a novel sailing rig design optimized for surfboards.
Description: Defines the core technical components of the invention, specifically the textile membrane and mounting structure.
State of the art, Historical overview and novelty: Contextualizes the invention within the history of Polynesian crab claw sails and addresses the novelty of the applied vortex coil geometry.
State of science: Reviews existing aerodynamic literature regarding the efficiency of delta-wing shapes and the physical necessity of vortex coil theory.
State of the science, vortex coil phenomenology: Provides a detailed scientific explanation of how helical vortex structures are formed and how they influence flow stability.
State of science, biology and technology: Draws parallels between the wingtip geometry of slow-sailing birds and modern technical winglet applications.
Problem description: Outlines the difficulty of adapting traditional crab claw rigs to modern surfboard hardware without excessive technical overhead.
Troubleshooting: Discusses the practical application and manufacturing feasibility of the proposed design using standard techniques.
Achievable benefits: Highlights the aerodynamic and handling advantages, such as improved lift and ease of use for untrained athletes.
Construction, structural design and mode of operation: Details the specific mechanical assembly, including the mast base, masts, and trim adjustments.
Operation: Explains how the rig functions during various sailing courses and how the mast articulation contributes to performance.
Keywords
Bionics, Vortex Coil Effect, Crab Claw Sail, Aerodynamics, Sailing Surfboard, Wing Theory, Induced Drag, Membrane Rig, Fluid Dynamics, Patent Technology, Mast Base, Lifting Force, Winglet, Nautical Engineering, Bernoulli Equation.
Frequently Asked Questions
What is the core subject of this patent?
The document describes a novel sailing rig for surfboards that utilizes the "vortex coil effect" inspired by biological models and historical Polynesian sail designs.
What is the primary goal of the invention?
The goal is to improve the aerodynamic efficiency of sailing surfboards by optimizing the sail geometry to generate stable edge vortices, which reduce induced drag.
Which scientific concept is the basis for the efficiency of the rig?
The rig is based on vortex coil theory, which describes how induced edge vortices can be organized into a stable, rotor-free jet stream to enhance performance.
Is this technology modeled on nature?
Yes, the invention applies bionic principles by modeling the sail geometry after the "crab claw" sail of Polynesian Proas and mimicking the wingtip mechanisms of slow-sailing birds.
How is the rig constructed?
It consists of a textile wing membrane supported by two resilient masts, connected through a specialized mast base and a sailing guide tree that allows for horizontal and vertical trimming.
What are the primary advantages for the user?
The design offers a better pressure point distribution, making the rig "good-natured" and easy to operate even for inexperienced athletes while maintaining high overall efficiency.
Why was the "crab claw" sail geometry historically misunderstood?
The author argues that previous research focused too narrowly on "delta-wing" phenomenology, ignoring the specific advantages of the vortex coil effects present in crab claw configurations.
What role does the mast base (Y) play?
The mast base acts as a complex mechanical coupling component that defines the fork angle, structural preload, and overall rigidity of the sailing rig.
Are there specific maintenance or production requirements?
No, the patent emphasizes that all components can be produced by a person of ordinary skill using standard materials such as reinforced plastics or wood.
How does the rig behave under different wind conditions?
The rig is designed to be operated in an upright position for most courses but remains flexible enough to be tilted via the mast foot articulation for optimal performance in various wind directions.
- Arbeit zitieren
- Dipl.-Ing. Michael Dienst (Autor:in), 2014, Transactions in Bionic Patents, Vol. 8: Vortex coil effect-use rig for sailing surfboards, München, GRIN Verlag, https://www.grin.com/document/277438
