| 摘要 |
An improved rotary gear for sailing boats is provided wherein the connection of the boom to the rest of the rig is such that on the horizontal plane the boom must rotate simultaneously with the rest of the rig, but that it can move up and down in the vertical plane in order to give tension to the sails and wherein the axis widens as it comes through the deck creating a base wide and strong, making it possible to control the rotation of the whole rig from the base, not only because of the necessary rotation control mechanisms, but also because the remaining rig elements are forced to rotate with the base, which permits also the use of rotating shrouds and stays to help in supporting the mast.
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