|
Multihull
A multihull is a boat or ship with more than one hull, whereas a vessel with a single hull is a monohull. The most common multihulls are catamarans (with two hulls), and trimarans (with three hulls). There are other types, with four or more hulls, but such examples are very rare and tend to be specialised for particular functions. Sailing multihulls Counter-intuitively, it is unhelpful to think of the design progression to be "1-2-3", namely monohull - catamaran - trimaran; rather, it is "1-3-2". A sailing trimaran is, in effect, a modified monohull with lightweight outrigger hulls (or "amas") for stability instead of a heavy deep keel; so it follows that a sailing trimaran will be lighter and faster than a sailing monohull. A sailing trimaran will have a centre hull that may comprise up to 90% of total hull volume, and 95% of total deadweight. A sailing trimaran at rest will have both amas out of the water and, when heeled, will only ever have one of the amas immersed. As ... [...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 rowi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Piver
Arthur Piver (; "Piver rhymes with diver"; 1910–1968) was a World War II pilot, an amateur sailor, author, printshop owner and legendary boatbuilder who lived in Mill Valley on San Francisco Bay and became "the father of the modern multihull." Career In the late 1950s and 1960s Piver designed and built a series of simple three-hulled, plywood yachts starting with a 16 footer and culminating in a 64-footer that was built in England for charter in the Caribbean. (The word "trimaran" was coined by Viktor Tchetchet, a Ukrainian emigrant to the US who tested his boats on Long Island sound in the late 1940s.) Piver crossed the Atlantic on his first ocean-going boat, the demountable 30 foot ''Nimble'', departing from Swansee, Mass, stopping in the Azores, and successfully reaching Plymouth, England. He then began selling do-it-yourself plans through a company called '' Pi-Craft''. He thought anyone could build one of his boats even if they had no experience. In 1962, Piver built hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trimaran
A trimaran (or double-outrigger) is a multihull boat that comprises a main hull and two smaller outrigger hulls (or "floats") which are attached to the main hull with lateral beams. Most modern trimarans are sailing yachts designed for recreation or racing; others are ferries or warships. They originated from the traditional double-outrigger hulls of the Austronesian cultures of Maritime Southeast Asia; particularly in the Philippines and Eastern Indonesia, where it remains the dominant hull design of traditional fishing boats. Double-outriggers are derived from the older catamaran and single-outrigger boat designs. Terminology The word "trimaran" is a portmanteau of "tri" and "(cata)maran", a term that is thought to have been coined by Victor Tchetchet, a pioneering, Ukrainian-born modern multihull designer. Trimarans consist of a main hull connected to outrigger floats on either side by a crossbeam, wing, or other form of superstructure—the traditional Polynesian ter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock Crowther
Lock Crowther (9 September 1940–1993; first name by birth Lachlan) was an Australian multihull sailboat designer. He grew up in Bairnsdale in the East Gippsland region of Victoria. Though his first name was Lachlan by birth, he insisted on being called Lock or Lockie. Career Lock and his family built his first boat, a trimaran called ''Bunyip'', in 1959 while he was still a teenager. In 1960 he raced in the Easter regatta at Paynesville, Victoria, Australia, and won against a field of 300 boats. This initial success inspired others to build similar boats. Crowther then studied electrical engineering in Melbourne and in the early 1960s became involved in multihull design and the '' Amateur Yacht Research Society''. In 1962 ''Trio'' was built based upon his designs. Crowther's next design was the Kraken 25, garnering some recognition. Later, Lockie decided to give up his day job in Melbourne and move to Sydney to design multihulls full-time. In 1969, a Kraken 40 won ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Wharram
James Wharram (15 May 1928 – 14 December 2021) was a British multihull pioneer and designer of catamarans. Polynesian beginnings Wharram was born in Manchester, England. In 1953, after long studies into the records of boats of the Pacific in the libraries and museums of Britain, and inspired by Eric de Bisschop's book ''The voyage of the Kaimiloa'', he designed and built the first British ocean-going double-canoe-catamaran, the ''Tangaroa'' (length ) and in 1955–56 sailed with Jutta Schultze-Rohnhof and Ruth Merseburger, across the Atlantic to Trinidad – the beginning of cruising and transatlantic crossing with a catamaran. No scholars in the Western world at this time believed that the Polynesians had boats capable of directed ocean voyages. Wharram believed otherwise and set out to prove it by doing it himself. He followed this first Atlantic crossing by building a 40-foot V-hull double canoe, ''Rongo'', in Trinidad in 1957–58, with Bernard Moitessier's help, and sail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farrier Marine
Farrier Marine is a catamaran and trimaran manufacturer based in Christchurch, New Zealand. The sailing boats produced by this shipyard are designed by Ian Farrier (1947-2017), and have a unique patented folding system without hinges in the beams or the critical beam to float join, allowing overall beam to be varied in seconds by just one person. History After gaining hands-on experience from building and sailing his own sailboats, Ian Farrier designed a trimaran folding system and applied in 1973 for a patent that was granted in 1975 as the Farrier Folding System. In 1974, the original prototype was built and launched by Farrier in Australia, followed in 1976 by the first Trailertri 18, and in 1980 by the first production fiberglass Farrier trimaran, that was named Australian Boat of the Year in 1981. In 1984, Ian Farrier funded by Corsair Marine in the US and started designing and building the F-27 trimaran ''Super Fox'' which set a race record in her first official event ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chris White (multihull Designer)
Chris White is an American multihull sailboat designer. Career White built his first trimaran, a Jim Brown designed Searunner 31, in 1973. In the late 1970s he worked with Jim Brown and Dick Newick. His first large design was the 52' trimaran, ''Juniper'', built in southern Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth are ... and launched in 1981, later sailed around the world by Henk de Velde. In 1983 he started his design business, developing the concept of the forward cockpit or pilot house catamaran. The first of the Atlantic Cats were launched in 1985. Designs *1981 ** ''Juniper'' *Later 1980s ** Discovery 20 ** Atlantic 50 *Atlantic Cats ** Atlantic 48 ** Atlantic 55 ** Atlantic 57 *2010s **Atlantic 47 Books In 1990 Chris published '' The Cruising Multihull'', which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hull (watercraft)
A hull is the watertight body of a ship, boat, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast. The line where the hull meets the water surface is called the waterline. General features There is a wide variety of hull types that are chosen for suitability for different usages, the hull shape being dependent upon the needs of the design. Shapes range from a nearly perfect box in the case of scow barges to a needle-sharp surface of revolution in the case of a racing multihull sailboat. The shape is chosen to strike a balance between cost, hydrostatic considerations (accommodation, load carrying, and stability), hydrodynamics (speed, power requirements, and motion and behavior in a seaway) and special considerations for the ship's role, such as the rounded bow of an icebreaker or the flat bottom of a landing craft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-outrigger Boat
Outrigger boats are various watercraft featuring one or more lateral support floats known as outriggers, which are fastened to one or both sides of the main hull. They can range from small dugout canoes to large plank-built vessels. Outrigger boats can also vary in their configuration, from the ancestral double-hull configuration ( catamarans), to single-outrigger vessels prevalent in the Pacific Islands and Madagascar, to the double-outrigger vessels ( trimarans) prevalent in Island Southeast Asia. They are traditionally fitted with Austronesian sails, like the crab claw sails and tanja sails, but in modern times are often fitted with petrol engines. Unlike a single-hulled vessel, an outrigger or double-hull vessel generates stability as a result of the distance between its hulls rather than due to the shape of each individual hull. As such, the hulls of outrigger or double-hull boats are typically longer, narrower and more hydrodynamically efficient than those of single- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monohull
right A monohull is a type of boat having only one 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 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 Romans, Phoenicians and Vikings. Modern ships carry tons of ballast in order to maintain their stability; even heavily laden cargo ships use ballast to optimize the dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catalac Catamarans
Catalac is a defunct English maritime construction company that specialised in building sailing catamarans. The company was founded by Tom Lack (hence "Cata + Lac"), in Christchurch, Dorset. After a successful period of production, the company closed in 1986. In the 1990s, the Catalac 9M was briefly revived and updated in the US as the "Catalac 900". Catalac catamarans The Catalac company's main model was the 9-metre 9M. All the other models are derived from the 9M and use a similar design concept; the 8M even used the same hulls as the 9M. All Catalacs were very strongly-built with thick grp hulls and glass windows. Some of the superstructure, such as the solid foredeck, was of sandwich grp construction. Compared to modern designs, Catalacs had a narrow beam of less than half the LOA, and vertical transoms (rather than the more modern "sugar scoop" with transom steps). Initially featuring lifting dinghy-type rudders, Catalac moved to fixed rudders protected by a skeg; this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derek Kelsall
Derek Kelsall is an English multihull sailboat designer now resident in New Zealand. Designs A partial list of Kelsall's designs follows. *'' Toria'' (1966) *''Trifle Trifle is a layered dessert of English origin. The usual ingredients are a thin layer of sponge fingers or sponge cake soaked in sherry or another fortified wine, a fruit element (fresh or jelly), custard and whipped cream layered in that ord ...'' (late 1960s) References Multihull designers Year of birth missing (living people) Living people Place of birth missing (living people) {{designer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
