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Leeboards
A leeboard is a form of pivoting keel used by a sailboat largely and very often in lieu of a fixed keel. Typically mounted in pairs on each side of a hull, leeboards function much like a centreboard, allowing shallow-draft craft to ply waters fixed keel boats cannot. Only the leeward side leeboard is used at any time, as it submerges when the boat heels under the force of the wind. A disadvantage, where there is an inadequate fixed keel, is that they typically ship (bear) little ballast, which being on the far side delays the onset of unballasted craft's heeling, that is, to put up a good, constant resistance against the wind. The classical, archetypal definition of ballast is a low, central weight to optimise centre of mass, reduce turning moment and therefore resistance to the boat keeling over, however tends to be higher in self-righting vessels. Modern developments allow them to act as a speed-enhancing lifting foil. History Leeboards existed in China from at least the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thames Sailing Barge
A Thames sailing barge is a type of commercial sailing boat once common on the River Thames in London. The flat-bottomed barges with a shallow draught and leeboards, were perfectly adapted to the Thames Estuary, with its shallow waters and narrow tributary rivers. The larger barges were seaworthy vessels, and were the largest sailing vessel to be handled by just two men. The average size was about 120 tons and they carried of canvas sail in six working sails. The mainsail was loose-footed and set up with a sprit, and was brailed to the mast when not needed. It is sheeted to a horse, as is the foresail; they require no attention when tacking. The foresail is often held back by the mate to help the vessel come about more swiftly. The topsail was usually first sail on and last sail off, being fixed to the topmast by hoops. In the upper reaches of the rivers and constricted harbours it reached into the clear air, and when approaching a berth casting off the halliard would drop it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proa
Proas are various types of multi-hull outrigger sailboats of the Austronesian peoples. The terms were used for native Austronesian ships in European records during the Colonial era indiscriminately, and thus can confusingly refer to the double-ended single-outrigger boats of Oceania, the double-outrigger boats of Island Southeast Asia, and sometimes ships with no outriggers or sails at all. In its most common usage, the term ''proa'' refers to the Pacific proas which consist of two (usually) unequal-length parallel hulls. It is sailed so that one hull is kept to windward, and the other to leeward. It is double-ended, since it needs to " shunt" to reverse direction when tacking. It is most famously used for the ''sakman'' ships of the Chamorro people of the Northern Marianas, which were known as the "flying proas" for their remarkable speed. In Island Southeast Asia, the term ''proa'' may also sometimes be used, but the terms perahu, prau, prahu, paraw and prow are more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junk (boat)
A junk (Chinese: 船, ''chuán'') is a type of Chinese sailing ship with fully battened sails. There are two types of junk in China: northern junk, which developed from Chinese river boats, and southern junk, which developed from Austronesian ships visiting southern Chinese coasts since the 3rd century CE. They continued to evolve in later dynasties and were predominantly used by Chinese traders throughout Southeast Asia. Similar junk sails were also adopted by other East Asian countries, most notably Japan where junks were used as merchant ships to trade goods with China and Southeast Asia. They were found, and in lesser numbers are still found, throughout Southeast Asia and India, but primarily in China. Historically, a Chinese junk could be one of many types of small coastal or river ships, usually serving as a cargo ship, pleasure boat, or houseboat, but also ranging in size up to large ocean-going vessel. Found more broadly today is a growing number of modern recreationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Barge
A Dutch barge is a traditional flat-bottomed shoal-draught barge, originally used to carry cargo in the shallow ''Zuyder Zee'' and the waterways of Netherlands. There are very many types of Dutch barge, with characteristics determined by regional conditions and traditions. Originally, Dutch barges were sailing craft with wooden hulls. Today, while few wooden examples remain, there are many steel barges that are 100 years old or more. Although most Dutch barges have been converted to motor-propulsion, ''schuyt'' sailing contests are still held on the IJsselmeer and on the Wadden Sea (Waddenzee). Dutch barges have become popular live-aboard leisure craft, and brand-new "Dutch-style" examples continue to be built. The Dutch barge A typical traditional Dutch barge would have gaff rig, a bluff bow and stern, a pair of leeboards and a large rudder. The leeboards and rudder would be raised by an arrangement of blocks and tackles. Schuyts engaged in eel fishing were said to have begun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klipper Pegasus Kieler Woche 2008
Klipper is a clipboard manager for the KDE interface. It allows users of Unix-like operating systems running the KDE desktop environment to access a history of X Selections, any item of which can be reselected for pasting. It can also be used to perform an action automatically if certain text is selected (e.g. opening a URL A Uniform Resource Locator (URL), colloquially termed as a web address, is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifie ... in a browser). References External linksThe Klipper Handbook Clipboard (computing) KDE software KDE Software Compilation {{KDE-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabin (ship)
A cabin or berthing is an enclosed space generally on a ship or an aircraft. A cabin which protrudes above the level of a ship's deck (ship), deck may be referred to as a deckhouse. Sailing ships In sailing ships, the officers and paying passengers would have an individual or shared cabin. The Captain (nautical), captain or commanding officer would occupy the "great cabin" that normally spanned the width of the stern and had large windows. On a warship, it was a privileged area, separate from the rest of the ship, for the exclusive use of the captain. In large warships, the cabin was subdivided into day and night cabins (bedrooms) by movable panels, called ''Bulkhead (partition), bulk-heads'', that could be removed in time of battle to leave the cabin clear for the gunners to use the chase gun, stern chasers several of which were usually stationed in the cabin. On large Three-decker, three decker warships in the age of sail the captain's cabin was sometimes appropriated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Inventions
China has been the source of many innovations, scientific discoveries and inventions. This includes the ''Four Great Inventions'': papermaking, the compass, gunpowder, and printing (both woodblock and movable type). The list below contains these and other inventions in ancient and modern China attested by archaeological or historical evidence, excluding prehistoric inventions of Neolithic and early Bronze Age China. The historical region now known as China experienced a history involving mechanics, hydraulics and mathematics applied to horology, metallurgy, astronomy, agriculture, engineering, music theory, craftsmanship, naval architecture and warfare. Use of the plow during the Neolithic period Longshan culture (c. 3000–c. 2000 BC) allowed for high agricultural production yields and rise of Chinese civilization during the Shang Dynasty (c. 1600–c. 1050 BC). Later inventions such as the multiple-tube seed drill and the heavy moldboard iron plow enabled China to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
