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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] |
Chine (boating)
A chine in boat design is a sharp change in angle in the Cross_section_(geometry), cross section of a hull (watercraft), hull. The chine typically arises from the use of sheet materials (such as sheet metal or marine ply) as the mode of construction. Rationale of chines Using sheet materials in boat construction is cheap and simple, but whereas these sheet materials are flexible longitudinally, they tend to be rigid vertically. Examples of steel vessels with hard chines include narrowboats and widebeams; examples of plywood vessels with hard chines include sailing dinghies such as the single-chined Graduate (dinghy), Graduate and the double-chined Enterprise (dinghy), Enterprise. Although a hull made from sheet materials might be unattractively "slab-sided", most chined hulls are designed to be pleasing to the eye and hydrodynamics, hydrodynamically efficient. Hulls without chines (such as Clinker (boat building), clinker-built or Carvel (boat building), carvel-built vessels) u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plano Formas
Plano may refer to: Native Americans * Plano cultures, the Late Paleo-Indian hunter-gatherer societies of the Great Plains of North America ** Plano point, the chipped stone tools of the Plano cultures Places in the United States * Plano, California, former name of Sanborn * Plano, Illinois ** Plano (Amtrak station), train station in Plano, Illinois * Plano, Indiana * Plano, Iowa * Plano, Missouri * Plano, Ohio * Plano, Texas Education in the United States * Plano High School (Illinois), a high school in Plano, Illinois * Plano Senior High School, a senior high school in Plano, Texas * Plano Independent School District, the school district serving Plano, Texas, and surrounding cities * University of Plano, a former liberal arts college in Plano, Texas People * Lorenzo de Plano (born 1994), American businessman * Óscar Plano (born 1991), Spanish footballer Other uses * Plano, California, fictitious home town near San Jose, of the protagonist of Donna Tartt's novel ''The Secre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Arrangement
A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made objects such as buildings and machines and natural objects such as biological organisms, minerals and chemicals. Abstract structures include data structures in computer science and musical form. Types of structure include a hierarchy (a cascade of one-to-many relationships), a network featuring many-to-many links, or a lattice featuring connections between components that are neighbors in space. Load-bearing Buildings, aircraft, skeletons, anthills, beaver dams, bridges and salt domes are all examples of load-bearing structures. The results of construction are divided into buildings and non-building structures, and make up the infrastructure of a human society. Built structures are broadly divided by their varying design approaches and standards, into categories including building structures, arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buoyancy
Buoyancy (), or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. The pressure difference results in a net upward force on the object. The magnitude of the force is proportional to the pressure difference, and (as explained by Archimedes' principle) is equivalent to the weight of the fluid that would otherwise occupy the submerged volume of the object, i.e. the displaced fluid. For this reason, an object whose average density is greater than that of the fluid in which it is submerged tends to sink. If the object is less dense than the liquid, the force can keep the object afloat. This can occur only in a no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy MTB 5
Royal may refer to: People * Royal (name), a list of people with either the surname or given name * A member of a royal family Places United States * Royal, Arkansas, an unincorporated community * Royal, Illinois, a village * Royal, Iowa, a city * Royal, Missouri, an unincorporated community * Royal, Nebraska, a village * Royal, Franklin County, North Carolina, an unincorporated area * Royal, Utah, a ghost town * Royal, West Virginia, an unincorporated community * Royal Gorge, on the Arkansas River in Colorado * Royal Township (other) Elsewhere * Mount Royal, a hill in Montreal, Canada * Royal Canal, Dublin, Ireland * Royal National Park, New South Wales, Australia Arts, entertainment, and media * ''Royal'' (Jesse Royal album), a 2021 reggae album * ''The Royal'', a British medical drama television series * ''The Royal Magazine'', a monthly British literary magazine published between 1898 and 1939 * ''Royal'' (Indian magazine), a men's lifestyle bimonthly * Royal Te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterline
The waterline is the line where the hull of a ship meets the surface of the water. Specifically, it is also the name of a special marking, also known as an international load line, Plimsoll line and water line (positioned amidships), that indicates the draft of the ship and the legal limit to which a ship may be loaded for specific water types and temperatures in order to safely maintain buoyancy, particularly with regard to the hazard of waves that may arise. Varying water temperatures will affect a ship's draft, because warm water is less dense than cold water, providing less buoyancy. In the same way, fresh water is less dense than salinated or seawater with a similar lessening effect upon buoyancy. For vessels with displacement hulls, the hull speed is defined by, among other things, the waterline length. In a sailing boat, the waterline length can change significantly as the boat heels, and can dynamically affect the speed of the boat. A waterline can also refer to any l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeological Institute Of America
The Archaeological Institute of America (AIA) is North America's oldest society and largest organization devoted to the world of archaeology. AIA professionals have carried out archaeological fieldwork around the world and AIA has established research centers and schools in seven countries. As of 2019, the society had more that 6,100 members and more than 100 affiliated local societies in the United States and overseas. AIA members include professional archaeologists and members of the public. The AIA has established many archaeological organizations and protected many historical sites in the world. The AIA has hosted an Annual Meeting every year for over 120 years, where archaeologists present their latest work. The institute also has established scholarships for students and awarded archaeologists for their contributions to archaeology. The institute publishes a scholarly journal, the '' American Journal of Archaeology'' (''AJA'') and the magazine ''Archaeology''. History T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeology (magazine)
''Archaeology'' is a bimonthly magazine for the general public, published by the Archaeological Institute of America The Archaeological Institute of America (AIA) is North America's oldest society and largest organization devoted to the world of archaeology. AIA professionals have carried out archaeological fieldwork around the world and AIA has established re .... The institute also publishes the professional '' American Journal of Archaeology.'' The editor-in-chief was Peter Young until 2011 when he was replaced by Claudia Valentino. Jarrett A. Lobell assumed the editorship from Valentino in November 2018. References External links * Science and technology magazines published in the United States Archaeology magazines Magazines established in 1948 Bimonthly magazines published in the United States Magazines published in New York City {{archaeology-mag-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plank (wood)
A plank is timber that is flat, elongated, and rectangular with parallel faces that are higher and longer than wide. Used primarily in carpentry, planks are critical in the construction of ships, houses, bridges, and many other structures. Planks also serve as supports to form shelves and tables. Usually made from sawed timber, planks are usually more than thick, and are generally wider than . In the United States, planks can be any length and are generally a minimum of deep by wide, but planks that are by and by are more commonly stocked by lumber retailers. Planks are often used as a work surface on elevated scaffolding, and need to be wide enough to provide strength without breaking when walked on. The wood is categorized as a board if its width is less than , and its thickness is less than . A plank used in a building as a horizontal supporting member that runs between foundations, walls, or beams to support a ceiling or floor is called a joist. The plank was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
30th Century BC
The 30th century BC was a century that lasted from the year 3000 BC to 2901 BC. Events * Before 3000 BC: An image of a deity (detail from a cong) recovered from Tomb 12 in Fanshan, Yuyao, Zhejiang, is made during the Neolithic period by the Liangzhu culture. It is now kept at Zhejiang Provincial Museum, Hangzhou. *c. 3000 BC - Earliest remains from Aniba (Nubia). * c. 3000 BC: Early agriculture in North Africa. * c. 3300 BC – 2600 BC: Early Harappan period continues in the Indus Valley. * c. 3000 BC: Camels are domesticated in Egypt. * c. 3000 BC: There is an intense phase of burial at on the Hill of Tara, the ancient seat of the High King of Ireland. * c. 3000 BC: Stonehenge begins to be built. In its first version, it consists of a circular ditch and bank, with 56 wooden posts. * c. 3000 BC: Cycladic civilization in the Aegean Sea starts. * c. 3000 BC: Helladic period starts. * c. 3000 BC: Aegean Bronze Age starts. * c. 3000 BC: Austronesian expansion begins. * c. 3000 BC: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monocoque
Monocoque ( ), also called structural skin, is a structural system in which loads are supported by an object's external skin, in a manner similar to an egg shell. The word ''monocoque'' is a French term for "single shell". First used for boats, a true monocoque carries both tensile and compressive forces within the skin and can be recognised by the absence of a load-carrying internal frame. Few metal aircraft other than those with milled skins can strictly be regarded as pure monocoques, as they use a metal shell or sheeting reinforced with frames riveted to the skin, but most wooden aircraft are described as monocoques, even though they also incorporate frames. By contrast, a semi-monocoque is a hybrid combining a tensile stressed skin and a compressive structure made up of longerons and ribs or frames. Other semi-monocoques, not to be confused with true monocoques, include vehicle unibodies, which tend to be composites, and inflatable shells or balloon tanks, both of which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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