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Multihull – Nacra 17
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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diagram Of Relationship Between Monohulls & Multihulls
A diagram is a symbolic representation of information using visualization techniques. Diagrams have been used since prehistoric times on walls of caves, but became more prevalent during the Enlightenment. Sometimes, the technique uses a three-dimensional visualization which is then projected onto a two-dimensional surface. The word ''graph'' is sometimes used as a synonym for diagram. Overview The term "diagram" in its commonly used sense can have a general or specific meaning: * ''visual information device'' : Like the term "illustration", "diagram" is used as a collective term standing for the whole class of technical genres, including graphs, technical drawings and tables. * ''specific kind of visual display'' : This is the genre that shows qualitative data with shapes that are connected by lines, arrows, or other visual links. In science the term is used in both ways. For example, Anderson (1997) stated more generally: "diagrams are pictorial, yet abstract, representati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Africa
East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territories make up Eastern Africa: Due to the historical Omani Empire and colonial territories of the British East Africa Protectorate and German East Africa, the term ''East Africa'' is often (especially in the English language) used to specifically refer to the area now comprising the three countries of Kenya, Tanzania, and Uganda. However, this has never been the convention in many other languages, where the term generally had a wider, strictly geographic context and therefore typically included Djibouti, Eritrea, Ethiopia, and Somalia.Somaliland is not included in the United Nations geoscheme, as it is internationally recognized as a part of Somalia. *Tanzania, Kenya, Uganda, Rwanda, Burundi, Democratic Republic of Congo and South Sudan are members of the East African Community. The firs ... [...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 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 is still in print. See also *Henk de Velde Henk de Velde (12 January 1949 – 3 November 2022) was a Dutch seafarer. He was especially known for his long solo-voyages around the world. Initially he worked for thirteen years in the merchant navy, from Ab ... [...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 hims ... [...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 the N ... [...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 al ... [...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 o ...'' (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] |
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 saili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry G
Henry may refer to: People *Henry (given name) *Henry (surname) * Henry Lau, Canadian singer and musician who performs under the mononym Henry Royalty * Portuguese royalty ** King-Cardinal Henry, King of Portugal ** Henry, Count of Portugal, Henry of Burgundy, Count of Portugal (father of Portugal's first king) ** Prince Henry the Navigator, Infante of Portugal ** Infante Henrique, Duke of Coimbra (born 1949), the sixth in line to Portuguese throne * King of Germany **Henry the Fowler (876–936), first king of Germany * King of Scots (in name, at least) ** Henry Stuart, Lord Darnley (1545/6–1567), consort of Mary, queen of Scots ** Henry Benedict Stuart, the 'Cardinal Duke of York', brother of Bonnie Prince Charlie, who was hailed by Jacobites as Henry IX * Four kings of Castile: **Henry I of Castile **Henry II of Castile **Henry III of Castile **Henry IV of Castile * Five kings of France, spelt ''Henri'' in Modern French since the Renaissance to italianize the name and to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tessarakonteres
''Tessarakonteres'' ( el, τεσσαρακοντήρης, "forty-rowed"), or simply "forty" was a very large catamaran galley reportedly built in the Hellenistic period by Ptolemy IV Philopator of Egypt. It was described by a number of ancient sources, including a lost work by Callixenus of Rhodes and surviving texts by Athenaeus and Plutarch. According to these descriptions, supported by modern research by Lionel Casson, the enormous size of the vessel made it impractical and it was built only as a prestige vessel, rather than an effective warship. The name "forty" refers not to the number of oars, but to the number of rowers on each column of oars that propelled it, and at the size described it would have been the largest ship constructed in antiquity, and probably the largest human-powered vessel ever built. Sources The "forty" was reportedly built by Ptolemy IV Philopator of Egypt in the 3rd century BC. It was first described by his contemporary Callixenus of Rhodes in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptolemy IV Philopator
egy, Iwaennetjerwymenkhwy Setepptah Userkare Sekhemankhamun Clayton (2006) p. 208. , predecessor = Ptolemy III , successor = Ptolemy V , horus = ''ḥnw-ḳni sḫꜤi.n-sw-it.f''''Khunuqeni sekhaensuitef'' The strong youth whose father has allowed him to appear , nebty = ''wr-pḥtj mnḫ-jb-ḫr-nṯrw-nbw nḏtj-n-ḥnmmt''''Werpekhty menekhibkhernetjerunebu nedjtyenkhenmemet'' Whose might is great, whose heart is beneficial with all the Gods, who is the savior of mankind , nebty_hiero = wr:r-F9:F9-mnx:D2-x:r-nTr-Z2:nb-Aa27-t*y:A40-n:N8-A1:Z2 , golden = '' swḏꜢ-bꜢḳt sḥḏ-gsw-prw smn-hpw-mi ḏḥwti-ꜤꜢ-ꜤꜢ nb-ḥbw-sd-mi-ptḥ-tꜢ-ṯnn ity-mi-rꜤ''''Sewedjabaqet sekhedjgesuperu semenhepumi Djehutia'a nebkhabusedmiptah-tatjenen itymire'' Who has kept Baqet safe by illuminating the temples and establishing laws like the twice-great Thoth, possessor of Sed festivals like Ptah Tatenen and a sovereign like Ra , golden_hiero = z:U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
