Tripod boom rig

Abstract

A teardrop shaped boom has an open interior and is rotatable about a fixed, freestanding cylindrical mast. The stays and spreaders rotate and are based on the boom. The stays provide side and back support balancing the forestay. A sail track assembly is also rotatable about the mast in conjunction with the boom to improve the airflow to the leeward face of the sail.

I claim:  
     
         1 . In combination with a cylindrical mast fixed to a sailboat hull, a unitary open frame boom having a teardrop shape affixed to a first sleeve rotatable about the mast, bracing members extending downwardly from the boom frame and affixed to a second sleeve spaced from the first, said second sleeve being rotatable about the mast and at least two shrouds are provided connected to the mast and the boom, whereby the boom is self-supporting.  
     
     
         2 . The combination of  claim 1  wherein the said boom extends forward of the mast, said two shrouds being attached aft of the mast to the boom frame and a third shroud extends from the mast forward to the boom frame.  
     
     
         3 . The combination of  claim 2  wherein the forward end of the boom has a sail track affixed thereto with a slider for adjusting a jib sail.  
     
     
         4 . A sailboat having a hull, a cylindrical mast fixed to and upstanding from the hull, a open teardrop shaped boom fitted with a first sleeve rotatably embracing said mast, bracing members extending downwardly from said boom and affixed to a second sleeve rotatably embracing the mast and spaced from the first sleeve whereby the boom is self supporting as it rotates about the mast.  
     
     
         5 . A sailboat as in  claim 4  wherein at least two shrouds connect the upper portion of the mast to each side of the boom.