Sail rig for a wind driven craft

Abstract

A sail rig for a wind driven craft comprising a rotatable gantry mast adapted to support one or more sails within the gantry and a support structure connected to said mast to rotate therewith and which carries an aft sail attachment boom which is pivoted to the support structure at a first end and provided with means for attachment to the clew of the sail or one of the sails at its second end, and a means for controlling the relative angle of the attachment boom in relation to the supporting structure.

1 . A sail rig for a wind driven craft comprising a rotatable gantry mast adapted to support one or more sails within the gantry and a support structure connected to said mast to rotate therewith and which carries an aft sail attachment boom which is pivoted to the support structure at a first end and provided with means for attachment to the clew of the sail or one of the sails at its second end, and a means for controlling the relative angle of the attachment boom in relation to the supporting structure.  
     
     
         2 . A sail rig for a wind driven craft as claimed in  claim 1  in which a single sail is employed and the support structure is provided with fore and aft sail attachment booms each of which is pivoted to the support structure at a first end and provided with means for attachment to the appropriate tack or clew of the sail at their respective second ends, and means for controlling the relative angle of each attachment boom in relation to the supporting structure.  
     
     
         3 . A sail rig for a wind driven craft as claimed in  claim 1  in which two sails are employed which include a mainsail which is attached to the aft end of said attachment boom and a foresail which is attached to the fore part of the support structure.  
     
     
         4 . A sail rig for a wind driven craft as claimed in  claim 2  in which two sails are employed which include a mainsail which is attached to the aft end of said attachment boom and a foresail which is attached to the fore attachment boom.  
     
     
         5 . A sail rig for a wind driven craft as claimed in any one of the preceding claims in which said supporting structure includes a rotatable turntable for attachment to the craft on which the gantry mast is supported and on which the attachment boom or booms are carried.  
     
     
         6 . A sail rig for a wind driven craft as claimed in any one of the preceding claims in which the gantry mast can be rotated through 360°.  
     
     
         7 . A sail rig for a wind driven craft as claimed in any one of the preceding claims in which said gantry mast has four legs.  
     
     
         8 . A sail rig for a wind driven craft as claimed in any one of the preceding claims in which the sail is provided with a flexible internal spine which extends between the upper part of the mast and the centre of rotation at the lower end thereof.  
     
     
         9 . A wind driven craft provided with a sail rig as claimed in any one of the preceding claims.  
     
     
         10 . A sail rig substantially as described herein with reference to and as shown in FIGS.  1  to  4  and FIG. 5.  
     
     
         11 . A wind driven craft substantially as described herein with reference to and as shown in FIGS.  1  to  4  and FIG. 5.