Spreader (sailboat)

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Four sets of swept and fixed spreaders on a large yacht Mast mit Salinge.jpg
Four sets of swept and fixed spreaders on a large yacht

A spreader is a spar on a sailing boat used to deflect the shrouds to allow them to better support the mast. [1] The spreader or spreaders serve much the same purpose as the crosstrees and tops in a traditional sailing vessel. [2]

Spreaders are used to increase the angle between the rigging and the mast, providing better support, and to adjust the mast's shape and bend. This allows the mast and rigging to be lighter and thinner, reducing their total weight. [3] Spreaders may be made of metal, often aluminium; wood, often spruce; or composite material such as carbon fiber. [2]

Spreader design and tuning can be quite complex. The spreaders may be fixed (rigid) or swinging (pivoted at the mast). Most cruising boats have fixed spreaders, but swinging spreaders are found on some racing boats. The length of a boat's beam determines how long the spreaders may be, so some boats have multiple sets of spreaders so the shroud can reach the desired angle from the mast. [2] Boats with tall masts, such as racing yachts, may have up to five sets. [3]

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Rigging comprises the system of ropes, cables and chains, which support a sailing ship or sail boat's masts—standing rigging, including shrouds and stays—and which adjust the position of the vessel's sails and spars to which they are attached—the running rigging, including halyards, braces, sheets and vangs.

<span class="mw-page-title-main">Sailboat</span> Boat propelled partly or entirely by sails

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<span class="mw-page-title-main">Sailing rigs</span> Description of the specific ways that a sailing craft is rigged

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<span class="mw-page-title-main">Catboat</span> Type of sailboat

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<span class="mw-page-title-main">Standing rigging</span> Rigging that supports masts

Standing rigging comprises the fixed lines, wires, or rods, which support each mast or bowsprit on a sailing vessel and reinforce those spars against wind loads transferred from the sails. This term is used in contrast to running rigging, which represents the moveable elements of rigging which adjust the position and shape of the sails.

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<span class="mw-page-title-main">Genoa (sail)</span> Type of large jib or staysail

A genoa sail is a type of large jib or staysail that extends past the mast and so overlaps the main sail when viewed from the side, sometimes eliminating it. It was originally called an "overlapping jib" and later a genoa jib. It is used on single-masted sloops and twin-masted boats such as yawls and ketches. Its larger surface area increases the speed of the craft in light to moderate winds; in high wind, a smaller jib is usually substituted, and downwind a spinnaker may be used.

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<span class="mw-page-title-main">Spinnaker</span> Sail designed for sailing off the wind

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<span class="mw-page-title-main">Running rigging</span> Lines that control sails

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<span class="mw-page-title-main">Mast (sailing)</span> Pole used in rigging of a sailing vessel

The mast of a sailing vessel is a tall spar, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying sails, spars, and derricks, giving necessary height to a navigation light, look-out position, signal yard, control position, radio aerial or signal lamp. Large ships have several masts, with the size and configuration depending on the style of ship. Nearly all sailing masts are guyed.

This glossary of nautical terms is an alphabetical listing of terms and expressions connected with ships, shipping, seamanship and navigation on water. Some remain current, while many date from the 17th to 19th centuries. The word nautical derives from the Latin nauticus, from Greek nautikos, from nautēs: "sailor", from naus: "ship".

<span class="mw-page-title-main">Tacking (sailing)</span> A sailing maneuver

Tacking or coming about is a sailing maneuver by which a sailing craft, whose next destination is into the wind, turns its bow toward and through the wind so that the direction from which the wind blows changes from one side of the boat to the other, allowing progress in the desired direction. Sailing vessels are unable to sail higher than a certain angle towards the wind, so "beating to windward" in a zig-zag fashion with a series of tacking maneuvers, allows a vessel to sail towards a destination that is closer to the wind that the vessel can sail directly.

<span class="mw-page-title-main">Trapeze (sailing)</span>

In sailing, the trapeze is a wire that comes from a point high on the mast, usually where the shrouds are fixed, to a hook on the crew member's harness at approximately waist level. The position when extended on the trapeze is outside the hull, braced against it with the soles of the feet, facing the masthead, and clipped on by a hook on the trapeze harness. This gives the crew member more leverage to keep the boat flat by allowing the crew member's centre of gravity to balance the force of the wind in the sails.

<span class="mw-page-title-main">Wingsail</span> Variable-camber aerodynamic structure

A wingsail, twin-skin sail or double skin sail is a variable-camber aerodynamic structure that is fitted to a marine vessel in place of conventional sails. Wingsails are analogous to airplane wings, except that they are designed to provide lift on either side to accommodate being on either tack. Whereas wings adjust camber with flaps, wingsails adjust camber with a flexible or jointed structure. Wingsails are typically mounted on an unstayed spar—often made of carbon fiber for lightness and strength. The geometry of wingsails provides more lift, and a better lift-to-drag ratio, than traditional sails. Wingsails are more complex and expensive than conventional sails.

<span class="mw-page-title-main">Sailing yacht</span> Private sailing vessel with overnight accommodations

A sailing yacht, is a leisure craft that uses sails as its primary means of propulsion. A yacht may be a sail or power vessel used for pleasure, cruising, or racing. There is no standard definition, so the term applies here to sailing vessels that have a cabin with amenities that accommodate overnight use. To be termed a "yacht", as opposed to a "boat", such a vessel is likely to be at least 33 feet (10 m) in length and have been judged to have good aesthetic qualities. Sailboats that do not accommodate overnight use or are smaller than 30 feet (9.1 m) are not universally called yachts. Sailing yachts in excess of 130 feet (40 m) are generally considered to be superyachts.

The following outline is provided as an overview of and topical guide to sailing:

<span class="mw-page-title-main">B&R rig</span> Variant of the Bermuda sailboat rig

The B&R rig is a variant of the Bermuda sailboat rig, designed and patented by Swedish aeronautical engineers Lars Bergström and Sven Ridder. It employs swept spreaders that are usually angled aft, together with "stays" running diagonally downward from the tip of the spreaders to the attachment of the next pair of spreaders to the mast or to the intersection of the mast with the deck that facilitates a pre-bend of the mast that is sometimes tuned into the rig before it is stepped onto the boat. Conventional shrouds thereby contribute to both lateral and longitudinal stability, unlike rigs with unswept spreaders. A B&R rig can be a masthead or fractional rig depending on how stays are configured; a backstay is optional. Such rigs are employed in many of the models of at least one U.S. manufacturer and in many thousands of boats, worldwide.

A solent refers to a sail and rigging system on sailboats, typically sloops. Sailors, particularly French sailors, often refer to a 100% jib as a Solent, because its smaller size is preferable when sailing in the strong winds found in the Solent between the Isle of Wight and Britain. The common use of roller-furling headsails, or genoas, on modern cruising yachts allows the jib to be reduced in size, but partially-furled sails lack the efficiency of a sail that is actually cut to a smaller size. Accordingly, it is preferable to fly a separate, smaller jib—the solent—instead.

This glossary of nautical terms is an alphabetical listing of terms and expressions connected with ships, shipping, seamanship and navigation on water. Some remain current, while many date from the 17th to 19th centuries. The word nautical derives from the Latin nauticus, from Greek nautikos, from nautēs: "sailor", from naus: "ship".

References

  1. Smith, Barrie; Evans, Jeremy; Manley, Pat, eds. (28 June 2018). The Sailing Bible: The Complete Guide for All Sailors from Novice to Experienced Skipper. Bloomsbury Publishing. ISBN   9781472949554 . Retrieved 23 March 2023.
  2. 1 2 3 Launer, Don. "Spreaders 101". Good Old Boat. Retrieved 23 March 2023.
  3. 1 2 Compton, Nic (21 April 2015). The Anatomy of Sail: The Yacht Dissected and Explained. Bloomsbury USA. pp. 58–59. ISBN   9781472902757 . Retrieved 23 March 2023.