초록 ▼

An airfoil system for use on water vessels is described. A plurality of fore and aft symmetrical sails are arranged to form an asymmetrical two surface airfoil. The individual sails may be rotated to allow tacking. The parameters of sail configurations described form a high lift low drag airfoil. Tw

An airfoil system for use on water vessels is described. A plurality of fore and aft symmetrical sails are arranged to form an asymmetrical two surface airfoil. The individual sails may be rotated to allow tacking. The parameters of sail configurations described form a high lift low drag airfoil. Two and three sail configurations are described.

대표청구항 ▼

A sail system for propelling a water vehicle comprising: a two surface sail for converting wind energy into a force including a first surface having a positive curvature for producing an area of low pressure, and a second surface for producing an area of pressure higher than said area of low pressur

A sail system for propelling a water vehicle comprising: a two surface sail for converting wind energy into a force including a first surface having a positive curvature for producing an area of low pressure, and a second surface for producing an area of pressure higher than said area of low pressure, and means for separating said first surface from said second surface in such a manner that said sail is symmetrical along one axis; and, rotatable mast means for conveying said force to a water vehicle; and, yard means for attaching said sail to said mast means; and, boom means attached to said mast means for attachment of a second sail set to create a slot between 5 and 8 percent of the chord length of said first sail between said first sail and said second sail; and, a second two surface sail for converting wind energy into a force; and, a second rotatable mast attached to said boom means for rotating said second sail during tacking.