Automatically rotatable sloop rig

An automatically rotatable sail rig for a sloop comprising:

• a stiff step structure bedded to the hull of said sloop;
• an upper main bearing on said step structure having a pair of upper and lower thrust bearings separated by a radial bearing;
• a lower bearing on said step structure having a radial bearing;
• a single vertical, tubular mast assembly mounted at its foot within said step structure;
• said mast assembly supporting a battened cloth mainsail along its luff;
• a substantially horizontal carrier boom freely rotatable about the radial bearing of said upper main bearing and hence freely rotatable about the vertical axis of mast assembly;
• said carrier boom having its angular span of free rotation limited by means of a line attached to the fore end of said carrier boom and attached to the hull along its centerline, said attachments being designed to permit the boat to be operated without adjusting sail sheets and said limiting line when making course changes, such as going about, jibing, changing from any tack to any other tack, and circling repeatedly, by manning only the helm or tiller;
• a rotatable, tubular, inclined forespar assembly mounted at its lower extremity on the fore end of said carrier boom and at its upper extremity near the head of said mast assembly;
• said forespar supporting a battened cloth jibsail along its luff;
• a tubular mainsail boom to accomodate the foot of said mainsail;
• the fore end of said mainsail boom being secured to said upper main bearing by a load spreader;
• said step structure mounting said mast, said carrier boom, said forespar and said mainsail boom;
• a vang to pull a weather-varying tension on the leech of said mainsail;
• said vang being made fast at its extremities to said mainsail boom and to the lower bearing of said step structure;
• a main sheet between said mainsail boom and said carrier boom to control the angle of said mainsail with respect to said rotatable carrier boom;
• a coordinated system of multiple jib sheets made fast to said jib battens to shape the jibsail generally and to control the angle of said jibsail with respect to said carrier boom and to said mainsail;
• a forestay set from the masthead to the nose of the hull to resist the horizontal moment of tension imposed on the leech of said mainsail;
• a plurality of athwartships shrouds to support said mast assembly;
• said forestay and said shrouds being flexibly anchored to said hull to permit free rotation of said spars, sails, vang, sheets, and carrier boom.