Patent Number: 6,170,421

Title: Apparatus for sails

Abstract: A sail envelope has an internal mast or spar and one or more profiles (1) that is or are free to rotate relative to the longitudinal axis of the mast. Each profile has an outer edge in the form of a symmetrical aerofoil upon which the inner sides of the external sail surfaces bear.

Inventors: Ross; Gordon (Glasgow, GB)

Assignee: Powerfoil Limited

International Classification: B63H 9/06 (20060101); B63H 9/00 (20060101); B63H 009/04 ()

Expiration Date: 01/09/2018