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Dolphin Striker
A dolphin striker (an older term for a martingale boom or simply a martingale; sometimes called a striker) is a small vertical or near vertical ancillary spar spanning between the bowsprit and martingale thereby redirecting the tension in the forward end of the martingale slightly more vertically. This vertical component is necessary to more effectively oppose the forestays' mostly upward tension on the forward end of the bowsprit than would be the case in the absence of the dolphin striker. Around 1813 some large sailing vessels experimented with double strikers: these had two downward-pointing spars forming an inverted ''V'' in the middle of the bowsprit. However, the practice was short-lived as it did not seem to provide any additional benefit. The dolphin striker's length was typically half the length of the spritsail yard or, when spreaders were used, the same length as one spreader. On a catamaran such as the Hobie 16 and the Tornado where the mast is stepped on a beam bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martingale DolphinStiker Bobstay , or occasionally a threefer
{{disambiguation ...
Martingale may refer to: * Martingale (probability theory), a stochastic process in which the conditional expectation of the next value, given the current and preceding values, is the current value *Martingale (tack) for horses * Martingale (collar) for dogs and other animals *Martingale (betting system), in 18th century France *a dolphin striker, a spar aboard a sailing ship *In the sport of fencing, a martingale is a strap attached to the sword handle to prevent a sword from being dropped if disarmed *In the theatrical lighting industry, ''martingale'' is an obsolete term for a twofer A twofer is a cabling device used in theatrical stage lighting. It allows two stage lighting instruments to be connected to one circuit. It is wired in parallel, such that voltage is unchanged in the twofer, and current Currents, Current or The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spar (sailing)
A spar is a pole of wood, metal or lightweight materials such as carbon fibre used in the rigging of a sailing vessel to carry or support its sail. These include yards, booms, and masts, which serve both to deploy sail and resist compressive and bending forces, as well as the bowsprit and spinnaker pole. In larger vessels during the age of sail, spare spars could be roped together to provide a temporary surface known as a "spar deck". These served as jury-rigged repairs for permanent decks, or as an additional platform under which to shelter goods or crew. The term was also informally applied to areas of the forecastle or quarterdeck where spare spars were stored by laying them flat against the existing decking. In the modern era the term has been used to describe the uppermost deck on flush deck Flush deck is a term in naval architecture. It can refer to any deck of a ship which is continuous from stem to stern. History The flush deck design originated with rice s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowsprit
The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow. The bowsprit is typically held down by a bobstay A bobstay is a part of the rigging of a sailing boat or ship. Its purpose is to counteract the upward tension on the bowsprit from the jibs and forestay. A bobstay may run directly from the stem to the bowsprit, References ...
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Wisconsin Historical Society
The Wisconsin Historical Society (officially the State Historical Society of Wisconsin) is simultaneously a state agency and a private membership organization whose purpose is to maintain, promote and spread knowledge relating to the history of North America, with an emphasis on the state of Wisconsin and the trans-Allegheny West. Founded in 1846 and chartered in 1853, it is the oldest historical society in the United States to receive continuous public funding. The society's headquarters are located in Madison, Wisconsin, on the campus of the University of Wisconsin–Madison. __TOC__ Organization The Wisconsin Historical Society is organized into four divisions: the Division of Library-Archives, the Division of Museums and Historic Sites, the Division of Historic Preservation-Public History, and the Division of Administrative Services. Division of Library, Archives, and Museum Collections The Division of Library-Archives collects and maintains books and documents about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hobie 16
The ISAF International Class Hobie 16 (H16) is a popular catamaran manufactured by the Hobie Cat Company for racing and day sailing. The craft was the driving force behind the popularization of beachcats and was recently inducted into the Sailing Hall Of Fame. Introduced in 1971, the Hobie 16 is the second largest boat fleet in existence with over 135,000 boats built to date. The boat is distinctly recognized for its asymmetric "banana" shaped hulls, designed to work without the need for daggerboards so the catamaran could be run up the beach without worry. The rudders kick up automatically by lifting up on the tiller crossbar. Design The Hobie 16 is manufactured in France by the Hobie Cat company, and by the Hobie Cat of America company in the United States. The Hobie 16 normally carries two sails, the mainsail and the jib. There is a kit to allow an H16 to fly a spinnaker but this is only class legal for youth racing. Each hull has two pylons (the forward ones are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tornado (sailboat)
The Tornado is a double handed multihull class recognised as an International Class by the International Sailing Federation. It was used for the Catamaran discipline at the Olympic Games from 1976 to 2008. Design The boat was designed in 1967 by Rodney March from the Isle of Sheppey, England. At the IYRU Olympic Catamaran Trials for international status, where it defeated other catamarans. To increase its performance even further, the Tornado was modified in 2001, with a new sail plan which included a spinnaker and spinnaker boom, as well as an increased sail area of the existing sails. An additional trapeze was also added, and the jib was made self tacking. The Tornado is among the fastest double handed catamarans, with an ISAF Small Catamaran Handicap Rating System rating of 0.934 and a D-PN of 59.0. It is the fastest catamaran in the RYA Portsmouth Yardstick scheme, with a 2015 Portsmouth Number of 634. Events Olympics The Tornado was used as the equipment for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet Archive
The Internet Archive is an American digital library with the stated mission of "universal access to all knowledge". It provides free public access to collections of digitized materials, including websites, software applications/games, music, movies/videos, moving images, and millions of books. In addition to its archiving function, the Archive is an activist organization, advocating a free and open Internet. , the Internet Archive holds over 35 million books and texts, 8.5 million movies, videos and TV shows, 894 thousand software programs, 14 million audio files, 4.4 million images, 2.4 million TV clips, 241 thousand concerts, and over 734 billion web pages in the Wayback Machine. The Internet Archive allows the public to upload and download digital material to its data cluster, but the bulk of its data is collected automatically by its web crawlers, which work to preserve as much of the public web as possible. Its web archiving, web archive, the Wayback Machine, contains hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sailing Rigs And Rigging
Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, windsurfer, or kitesurfer), on ''ice'' (iceboat) or on ''land'' (land yacht) over a chosen course, which is often part of a larger plan of navigation. From prehistory until the second half of the 19th century, sailing craft were the primary means of maritime trade and transportation; exploration across the seas and oceans was reliant on sail for anything other than the shortest distances. Naval power in this period used sail to varying degrees depending on the current technology, culminating in the gun-armed sailing warships of the Age of Sail. Sail was slowly replaced by steam as the method of propulsion for ships over the latter part of the 19th century – seeing a gradual improvement in the technology of steam through a number of stepwise developments. Steam allowed scheduled services that ran at higher average speeds than sailin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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