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Lark (dinghy)
The Lark is a two-person, non-trapeze sailing dinghy, designed in 1966 by Michael Jackson (who was also responsible for many National 12 and Merlin Rocket designs). All Larks are made of glass-reinforced plastic (GRP). The Lark is a one-design class which leads to very close racing. The boat is very popular in the UK with a new builder (Synergy Marine) signed up in 2021 with a brand new design variation on the existing hull shape. In the UK the class became very popular through the university team racing circuit. The boat was also popular in clubs as it is suited to a wide range of crew weights, typically from 18 stone up to 25 stone. It is still one of the fastest non-trapeze dinghies available. Larks participate in handicap racing, utilising a Portsmouth number of 1073. National Championships are held every year in the UK. Entries to the Nationals in the 1970s and 1980s was typically 125 plus boats and although numbers have dropped still typically attracts 50 plus boats to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monohull
image:monohull.svg, right A monohull is a type of boat having only one hull (watercraft), hull, unlike multihulled boats which can have two or more individual hulls connected to one another. Fundamental concept Among the earliest hulls were simple logs, but these were generally unstable and tended to roll over easily. Hollowing out the logs into a dugout canoe doesn't help much unless the hollow section penetrates below the log's center of buoyancy, then a load carried low in the cavity actually stabilizes the craft. Adding weight or Sailing ballast, ballast to the bottom of the hull or as low as possible within the hull adds stability. Naval architects place the center of gravity substantially below the center of buoyancy; in most cases this can only be achieved by adding weight or ballast. The use of stones and other weights as ballast can be traced back to the Ancient Rome, Romans, Phoenicians and Vikings. Modern ships carry tons of ballast in order to maintain their stabil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fiberglass
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non- magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced plastic (GFRP) or GF ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinghy Sailing
Dinghy sailing is the activity of sailing small boats by using five essential controls: * the sails * the foils (i.e. the daggerboard or centreboard and rudder and sometimes lifting foils as found on the Moth) * the trim (forward/rear angle of the boat in the water) * side-to-side balance of the dinghy by hiking or movement of the crew, particularly in windy weather ("move fast or swim") * the choice of route (in terms of existing and anticipated wind shifts, possible obstacles, other water traffic, currents, tides etc.) When racing, the above skills need to be refined and additional skills and techniques learned, such as the application of the "racing rules of sailing", boat handling skills when starting and when rounding marks, and knowledge of tactics and strategy. Racing tactics include positioning the boat at different angles. To improve speed when racing, sailors should position themselves at the windward direction (closest to the direction of the wind) in order to get " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National 12 (dinghy)
The National 12 is a two-person, two-sail, twelve-foot (3.6 metre) long sailing dinghy. They are sailed extensively in the UK. The class was started in 1936 by the Royal Yachting Association as an alternative to the more expensive International 14s. The rules limit the length of the boat to 12 ft, beam to 6 ft 6 in, an all up weight to 78 kg and a sail area of 10.4 m2. National 12s are sailed on all types of water from narrow rivers to the open sea. The class holds a national championships on an annual basis – known as Burton Week after the premier prize of the week: The Sir William Burton Cup – at various venues around the UK coast. The National 12 is a development class where within a set of rules (and with occasional considered changes to those rules) the boats have been able to evolve over time, moving from wood and clinker construction to high-performance glass and carbon fibre-foam composite boats. One of the most noticeable changes in the boats is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merlin Rocket
The Merlin Rocket is a dinghy sailed in the United Kingdom. It is an active class, now with over 3700 boats built. The boat designed around a box rule, meaning that all class boats need to be within a certain length and width, but can be any shape. This allows for quick modernization of the class. The great advantage to this is quick adoption to new technology and the ability to change a boat to a person's weight and ability. Although the rules allow for many sail plans, many modern Rockets have similar sails. Most have a high batten allowing for a large roach in the sail. Although the rules are open, they are not unlimited. Use of a Trapeze is forbidden in this class. When competing in a mixed fleet, the Merlin Rocket uses a Portsmouth Yardstick handicap of 1002 in the RYA scheme and 77.9 in the US Sailing scheme. History The 'Merlin Rocket class' was created by the merger of two previously separate classes. The 'Merlin' was originally designed in 1945/6 by Jack Holt as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass-reinforced Plastic
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non-magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced plastic (GFRP) or GFK ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sailing (sport)
The sport of sailing involves a variety of competitive sailing formats that are sanctioned through various sailing federations and yacht clubs. Racing disciplines include matches within a fleet of sailing craft, between a pair thereof or among teams. Additionally, there are specialized competitions that include setting speed records. Racing formats include both closed courses and point-to-point contests; they may be in sheltered waters, coast-wise or on the open ocean. Most competitions are held within defined classes or ratings that either entail one type of sailing craft to ensure a contest primarily of skill or rating the sailing craft to create classifications or handicaps. On water, a sailing competition among multiple vessels is a regatta, which usually consists of multiple individual races, where the boat crew that performs best in over the series of races is the overall winner. There is a broad variety of kinds of races and sailboats used for racing from large yacht to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portsmouth Yardstick
The Portsmouth Yardstick (PY) or Portsmouth handicap scheme is a term used for a number of related systems of empirical handicapping used primarily in small sailboat racing. The handicap is applied to the time taken to sail any course, and the handicaps can be used with widely differing types of sailboats. Portsmouth Numbers are updated with data from race results, normally annually. The various schemes are not directly linked, and ratings for the same class can and often do vary in the different schemes. The most prominent Portsmouth Yardstick systems are probably those administered in the United States by the Portsmouth Numbers Committee, in the United Kingdom by the Royal Yachting Association ( RYA) and in Australia by Victoria Yachting. History The original UK Portsmouth Yardstick was developed by Stanley Milledge, who was in charge of handicapping racing at the '' Langstone Sailing Club'' in 1947 using the ''Island One'' design as the scratch boat (having a value 100). In 195 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tufts University
Tufts University is a private research university on the border of Medford and Somerville, Massachusetts. It was founded in 1852 as Tufts College by Christian universalists who sought to provide a nonsectarian institution of higher learning. Tufts remained a small New England liberal arts college until the 1970s, when it transformed into a large research university offering several doctorates;Its corporate name is still "The Trustees of Tufts College" it is classified as a "Research I university", denoting the highest level of research activity. Tufts is a member of the Association of American Universities, a selective group of 64 leading research universities in North America. The university is known for its internationalism, study abroad programs, and promoting active citizenship and public service across all disciplines. Tufts offers over 90 undergraduate and 160 graduate programs across ten schools in the greater Boston area and Talloires, France. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympic Games
The modern Olympic Games or Olympics (french: link=no, Jeux olympiques) are the leading international sporting events featuring summer and winter sports competitions in which thousands of athletes from around the world participate in a variety of competitions. The Olympic Games are considered the world's foremost sports competition with more than 200 teams, representing sovereign states and territories, participating. The Olympic Games are normally held every four years, and since 1994, have alternated between the Summer and Winter Olympics every two years during the four-year period. Their creation was inspired by the ancient Olympic Games (), held in Olympia, Greece from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the International Olympic Committee (IOC) in 1894, leading to the first modern Games in Athens in 1896. The IOC is the governing body of the Olympic Movement (which encompasses all entities and individuals involved in the Oly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
470 (dinghy)
The 470 (Four-Seventy) is a double-handed monohull planing dinghy with a centreboard, Bermuda rig, and centre sheeting. Equipped with a spinnaker, trapeze and a large sail-area-to-weight ratio, it is designed to plane easily, and good teamwork is necessary to sail it well. The name comes from the boat's length of . The 470 is a popular class with both individuals and sailing schools, offering a good introduction to high-performance boats without being excessively difficult to handle, but it is not a boat designed for beginners. Its smaller sister, the 420, is a stepping stone to the 470. The 470 is a World Sailing International Class and has been an Olympic class since the 1976 games. History The 470 was designed in 1963 by the Frenchman André Cornu as a modern fibreglass planing dinghy to appeal to sailors of different sizes and ages. This formula succeeded, and the boat spread around the world. In 1969, the class was given international status and it has been an Olympic cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
420 (dinghy)
The International 420 Dinghy is a sailing dinghy popular for racing and teaching. The hull is fiberglass with internal buoyancy tanks. The 420 has a bermuda rig and an optional spinnaker and trapeze. It has a large sail-area-to-weight ratio, and is designed to plane easily. It can be rigged to be sailed single-handed or double-handed. The 420 is an International class recognized by World Sailing. The name refers to the boat's length of . History The International 420 was designed by Christian Maury. The class developed rapidly in France, being adopted nationally as a youth trainer for the larger Olympic class International 470. By the late 1960s the class was adopted by a few UK university sailing clubs for training and team racing. The 420 was designed specifically to be easier to handle than its larger higher-performance cousin, the 470. Construction The class adopted a policy of "prudent evolution" so as to allow development without making existing dinghies obsolete. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
