Downloads

A summary of the principles underlying the WindFly Rig is provided on the Theory page. More detail is provided in the documents available to download below. 

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Concept
1. Advantages relative to conventional sail rigs
2. Basic arrangement, principles and terminology
3. Theory
4. Use of combined 'keel-rudders' to avoid leeway
5. Mounted on a displacement boat
6. Mounted on a planing or semi-planing boat – Simple keel-rudder
7. Mounted on a planing boat - Keel-rudders and hydrofoil
8. Planing upwind as well as downwind
9. Mounted on a foiling boat
10. Responses to challenges that stopped others
11. Responses to particular health & safety hazards

Principal references:

  1. Lars Larsson & Rolf Eliasson, "Principles of Yacht Design" 3rd edition, International Marine / McGraw Hill.

  2. Daniel Savitsky, "Hydrodynamic Design of Planing Hulls", October 1964.

  3. Lindsay Lord, "Naval Architecture of Planing Hulls" 3rd edition, Cornell Maritime Press.

  4. Clement, E.P. & Blount, D.L. 1963. Resistance Tests of a Systematic Series of Planing Hull Forms.

  5. Daniel Savitsky , Semi-displacement hulls – A misnomer?, 2014

  6.  Nigel Irens Design, The application of slender hull technology in powered yachts and small commercial craft, 2004

  7.  Dr P van OossanenResistance prediction of small high-speed displacement vessels,1979

  8. Ira H. Abbott & ALbert E. Von Doenhoff, "Theory of Wing Sections" Dover Edition (1959), Dover Publications.

  9. http://peterlynnhimself.com/Kites_For_Yachts.php

UK patent GB2508660