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A modern yacht with a trysail set. A trysail (also known as a spencer [citation needed]) is a small triangular or gaff rigged sail hoisted in place of a larger mainsail when winds are very high. [1]
A jib, left, compared to a roughly 110% genoa, right. The foretriangle is outlined in red. The term jib is the generic term for any of an assortment of headsails.The term genoa (or genny) refers to a type of jib that is larger than 100% of the foretriangle, which is the triangular area formed by the point at which the stay intersects the mast, and deck or bowsprit, and the line where the mast ...
An overlapping jib is called a genoa jib or simply a genoa (see illustration). These are efficiently used when reaching more broadly than a close reach. Alternatively, a boat may carry smaller jibs, to compensate aerodynamics when the main sail is reefed; these more rugged sails are called storm jibs or spitfires. [2]
On a sloop, there is a single forestay that runs from the top of the mast forward to the prow, and in addition to bracing the mast it provides a firm support to which a jib can be attached. When this forestay is covered with a roller-furling jib, which cannot be quickly removed, it becomes impossible to attach a different sail to the same stay.
There are four typical remedies used: 1.) put reef points in the jib, 2.) have a smaller jib to set in place of the full sized one, 3.) have a roller furling mechanism that rolls up the jib like window shade, and 4.) have two jibs instead of one (often referred to as a 'cutter' rig), so one of the jibs can be taken in.
A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [1] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
Tuesday's quake was the worst in China since a 6.2 magnitude earthquake in 2023 that killed at least 149 people in a remote northwestern region. In 2008, an 8.0 magnitude earthquake hit Sichuan ...
A simple home-built jib furler, showing the furling line ready to furl the jib, and (inset) showing the furled jib This staysail schooner's large genoa has been roller-furled away, while its staysails are hanked on. Roller furling is a method of furling (i.e. reefing) a yacht's staysail by rolling the sail around a stay.