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Main Sail
A mainsail is a sail rigged on the main mast of a sailing vessel. * On a square rigged vessel, it is the lowest and largest sail on the main mast. * On a fore-and-aft rigged vessel, it is the sail rigged aft of the main mast. The sail's foot is normally attached to a boom. (In extremely heavy weather, the mainsail may be lowered, and a much smaller trysail hoisted in its place). Historical fore-and-aft rigs used a four-sided gaff rigged mainsail, sometimes setting a gaff topsail above it. Whereas once the mainsail was typically the largest sail, today the mainsail may be smaller than the jib or genoa; Prout catamarans typically have a mainmast stepped further aft than in a standard sloop, so that the mainsail is much smaller than the foresail. Bermuda rig The modern Bermuda rig uses a triangular mainsail aft of the mast, closely coordinated with a jib for sailing upwind. A large overlapping jib or genoa is often larger than the mainsail. In downwind conditions (with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krusenstern Mainsails
Krusenstern or Kruzenshtern may refer to: * Adam Johann von Krusenstern (1770–1846), Baltic German admiral and explorer who circumnavigated the world in Russian service Places named after von Krusenstern * Krusenstern (crater), on the moon * Krusenstern Island (other) ** A small group of islands in the Middendorff Bay ** Little Diomede Island, in Alaska ** Ailuk Atoll, in the Marshall Islands ** Tikehau-Atoll, of Tuamotu Archipelago in French Polynesia * Krusenstern Strait, Kuril Islands, Russia * Cape Krusenstern, in Alaska ** Cape Krusenstern National Monument in Alaska * "Krusenstern Reef," "Krusenstern Rock," or "Krusenstern Island," a phantom reef south of the Northwestern Hawaiian Islands * Mount Krusenstern, Novaya Zemlya, Russia Other uses * ''Kruzenshtern'' (ship) (until 1946 German ''Padua''), a Russian tall ship training vessel * Krusenstern field, a natural gas field in Russia * Cape Krusenstern, at the west end of Coronation Gulf Coronation Gulf lies be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bermuda Rig
A Bermuda rig, Bermudian rig, or Marconi rig is a configuration of Mast (sailing), mast and rigging for a type of sailboat and is the typical configuration for most modern sailboats. This configuration was developed in Bermuda in the 1600s; the term ''Marconi'', a reference to the inventor of the Radio#History, radio, Guglielmo Marconi, became associated with this configuration in the early 1900s because the wires that stabilize the mast of a Bermuda rig reminded observers of the wires on early radio masts. Description The rig consists of a triangular sail set aft of the mast with its Mainsail#Bermuda rig, mainsail raised to the top of the mast; its parts of a sail, luff runs down the mast and is normally attached to it for its entire length; its Tack (sailing), tack is attached at the base of the mast; its Parts of a sail, foot (in modern versions of the rig) controlled by a Boom (sailing), boom; and its Parts of a sail, clew attached to the aft end of the boom, which is control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reef Diamond
A reef is a ridge or shoal of rock, coral or similar relatively stable material, lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic component, abiotic processes—deposition (geology), deposition of sand, wave erosion planing down rock outcrops, etc.—but there are also reefs such as the coral reefs of tropical waters formed by biotic component, biotic processes dominated by corals and coralline algae, and artificial reefs such as shipwrecks and other anthropogenic underwater structures may occur intentionally or as the result of an accident, and sometimes have a designed role in enhancing the physical complexity of featureless sand bottoms, to attract a more diverse assemblage of organisms. Reefs are often quite near to the surface, but not all definitions require this. Earth's largest coral reef system is the Great Barrier Reef in Australia, at a length of over . Biotic There is a variety of biotic reef types, including oyster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sail Batten
On sailboats, a sail batten is a flexible insert in a sail, parallel to the direction of wind flow, that helps shape its qualities as an airfoil. Battens are long, thin strips of material, historically wooden but today usually fiberglass, vinyl, or carbon fiber, used to support the roach of a sail. They are also used on tall ships to form the ladders up the shrouds in a fashion similar to ratlines. History A '' junk'' is an ancient Chinese sailing ship design that is still in use today. Junks were used as seagoing vessels as early as the 2nd century AD and developed rapidly during the Song Dynasty (960–1279). Their rigs featured full-length battens that facilitated short-handed sail handling, including reefing. Applications in sails The most common use of sail battens is in the roach of a mainsail. The batten extends the leech past the line that runs from the head and the clew of the sail to create a wider sail towards the top. Cruising sailboats may have four to six batt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt-rope
A bolt rope (Variants: "bolt-rope" and "boltrope", French: ''ralingue'', Spanish: ''relinga'', Old Norse: *''rár-línk'', comprising ''rár'' genitive of ''rá'' "rope" and ''línk'' "edge of a sail "), is the rope that is sewn at the edges of the sail to reinforce them, or to fix the sail into a groove in the boom or in the mast. Fore-and-aft sails often have bolt ropes on the leading edge (luff) where they attach to the mast and the bottom edge (foot) where they attach to the boom, which provide the terms, "luff bolt rope" and "foot bolt rope". They also occur on the edges of sails suspended from a spar, such as for gaff, square and lateen rigs. Attachment and characteristics Bolt ropes were described as early as 1847, when Robert Kipping addressed "bolt-rope" attachment for a variety of sails, using sewing techniques appropriate to each, in his book, ''The Elements of Sailmaking''. He addressed the tradeoff between stiffness and flexibility to provide reinforcement without ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathanael Greene Herreshoff
Nathanael Greene Herreshoff (March 18, 1848 – June 2, 1938) was an American naval architect, mechanical engineer, and yacht design innovator. He produced a succession of undefeated America's Cup defenders between 1893 and 1920. Biography Herreshoff was born on March 18, 1848, in Bristol, Rhode Island and was named after General Nathanael Greene. He was one of seven brothers. He graduated from the Massachusetts Institute of Technology in 1870 with a three-year degree in mechanical engineering. After graduation, he took a position with the Corliss Steam Engine Company in Providence, Rhode Island. At the 1876 Centennial Exposition in Philadelphia, Pennsylvania, he oversaw operation of the Corliss Stationary Engine, a , dynamo that powered the exhibition's machinery. In 1878 Herreshoff returned to Bristol where he and one of his brothers, John Brown Herreshoff (1841–1915), who was blind, formed the Herreshoff Manufacturing Company. Nathanael provided the engineering expertise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sail Batten
On sailboats, a sail batten is a flexible insert in a sail, parallel to the direction of wind flow, that helps shape its qualities as an airfoil. Battens are long, thin strips of material, historically wooden but today usually fiberglass, vinyl, or carbon fiber, used to support the roach of a sail. They are also used on tall ships to form the ladders up the shrouds in a fashion similar to ratlines. History A '' junk'' is an ancient Chinese sailing ship design that is still in use today. Junks were used as seagoing vessels as early as the 2nd century AD and developed rapidly during the Song Dynasty (960–1279). Their rigs featured full-length battens that facilitated short-handed sail handling, including reefing. Applications in sails The most common use of sail battens is in the roach of a mainsail. The batten extends the leech past the line that runs from the head and the clew of the sail to create a wider sail towards the top. Cruising sailboats may have four to six batt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinnaker
A spinnaker is a sail designed specifically for sailing off the wind on courses between a reach (wind at 90° to the course) to downwind (course in the same direction as the wind). Spinnakers are constructed of lightweight fabric, usually nylon, and are often brightly colored. They may be designed to perform best as either a reaching or a running spinnaker, by the shaping of the panels and seams. They are attached at only three points and said to be ''flown''. Nomenclature Informal names for a spinnaker are ''kite'' or ''chute'' (owing to their resemblance to a parachute in both construction and appearance). Boats may have more than one spinnaker, differentiated by a letter to indicate symmetric (S) or asymmetric (A) and a number to indicate size (with higher numbers indicating smaller size), e.g. ''A1'' would be a large asymmetric sail and ''S3'' would be a smaller symmetric sail. Operation A spinnaker is used for sailing with the direction of the wind. Symmetrical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genoa (sail)
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. Definition 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 the 100% 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 intersects deck at the rail. Colloquially the term is sometimes used interchangeably with ''jib''. A working jib is no larger than the 100% foretriangle. A genoa is larger, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mast-aft Rig
A mast-aft rig is a sailboat sail-plan that uses a single mast set in the aft half of the hull. The mast supports fore-sails that may consist of a single jib, multiple staysails, or a crab claw sail. The mainsail is either small or completely absent. Mast-aft rigs are uncommon, but are found on a few custom, and production sailboats. Comparison to other single mast rigs Many mast-aft rigs utilize a small mainsail and multiple staysails that can resemble some cutter rigs. A cutter is a single masted vessel, differentiated from a sloop either by the number of staysails, with a sloop having one and a cutter more than one, or by the position of the mast, with a cutter's mast being located between 50% and 70% of the way from the aft to the front of the sailplan, and a sloop's mast being located forward of the 70% mark. A mast-aft rig could, based on headsail count, be considered a variation of the sloop or cutter, or, based on mast position, a unique rig. Advantages In the typic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mast (sailing)
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, and 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. Until the mid-19th century, all vessels' masts were made of wood formed from a single or several pieces of timber which typically consisted of the trunk of a conifer tree. From the 16th century, vessels were often built of a size requiring masts taller and thicker than could be made from single tree trunks. On these larger vessels, to achieve the required height, the masts were built from up to four sections (also called masts). From lowest to highest, these were called: lower, top, topgallant, and royal masts. Giving the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catamaran
A Formula 16 beachable catamaran Powered catamaran passenger ferry at Salem, Massachusetts, United States A catamaran () (informally, a "cat") is a multi-hulled watercraft featuring two parallel hulls of equal size. It is a geometry-stabilized craft, deriving its stability from its wide beam, rather than from a ballasted keel as with a monohull boat. Catamarans typically have less hull volume, smaller displacement, and shallower draft (draught) than monohulls of comparable length. The two hulls combined also often have a smaller hydrodynamic resistance than comparable monohulls, requiring less propulsive power from either sails or motors. The catamaran's wider stance on the water can reduce both heeling and wave-induced motion, as compared with a monohull, and can give reduced wakes. Catamarans were invented by the Austronesian peoples which enabled their expansion to the islands of the Indian and Pacific Oceans. Catamarans range in size from small sailing or rowing ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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