|
Oar (sport Rowing)
In rowing, oars are used to propel the boat. Oars differ from paddles in that they use a fixed or sliding fulcrum, an oarlock or rowlock attached to the side of the boat, to transfer power from the handle to the blade, rather than using the athlete's shoulders or hands as the pivot-point as in canoeing and kayaking. When the rower uses one oar on one side, it is called ''sweep'' rowing that the single oar is called a "sweep" oar. When the rower uses two oars at the same time, one on each side, it is called sculling, and the two oars are called a pair of "sculls". Typical sculls are around 284 cm - 290 cm in length — sweep oars are 370 cm - 376 cm. A scull has a smaller blade area, as each rower wields a pair of them at any one time, operating each with one hand. Since the 1980s many oars have been adjustable in length. The shaft of the oar ends with a thin flat surface 40 to 50 cm long and 25 cm wide, variously called the blade or spoon. Fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croker Sculling Oars
Croker Oars is an Australian manufacturer of rowing oars that was started by Howard Croker OAM in Sydney, Australia. They are now manufactured on Oxley Island, Taree, on the banks of the lower Manning River, in New South Wales. During the 1950s, Croker and his two brothers were students at Newington College and their father was a rowing coach at the school. Howard Croker went on to be a successful rower in the 1960s, winning both State and National rowing titles. Croker rowed for the then Haberfield Rowing Club at Dobroyd Point and was a coach in the years 1975 and 1976 at The Scots College. Croker Oars currently produce sculling and sweep oars for the Australian and international market. Croker also manufactures surf boat oars. Many elite rowers use Croker oars and together with Concept2 Concept2, Inc. is an American manufacturer of rowing equipment and exercise machines that is based in Morrisville, Vermont. It is best known for its air resistance indoor rowing mach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drag (physics)
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or between a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, the drag force depends on velocity. Drag force is proportional to the velocity for low-speed flow and the squared velocity for high speed flow, where the distinction between low and high speed is measured by the Reynolds number. Even though the ultimate cause of drag is viscous friction, turbulent drag is independent of viscosity. Drag forces always tend to decrease fluid velocity relative to the solid object in the fluid's path. Examples Examples of drag include the component of the net aerodynamic or hydrodynamic force acting opposite to the d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Rowing Blades
This is a list of blades of national teams, rowing clubs, schools and universities. The designs are not trademarked while the sport remains near globally not-for-profit although in some jurisdictions a club may assert design rights and similar to prevent imitation. It is also possible where identical or near identical blades are watched in winter head races or in summer side-by-side (multi-lane regatta) races for there to be instances of mistaken identity among supporters all of which considerations are commonly borne in mind instead of choosing unpainted blades among established clubs. National teams National teams often draw their colours from the related national flags. Clubs Club colours may be entirely original or very often based on local governmental or manorial coats of arms. School and university As with other academic sports teams the blades used tend to draw as their inspiration heraldry of their academic institutions. On rare occasions a colour difference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coxless Four
A coxless four is a rowing boat used in the sport of competitive rowing. It is designed for four persons who propel the boat with sweep oars, without a coxswain. The crew consists of four rowers, each having one oar. There are two rowers on the stroke side (rower's right hand side) and two on the bow side (rower's lefthand side). There is no coxswain, but the rudder is controlled by one of the crew, normally with the rudder cable attached to the toe of one of their shoes which can pivot about the ball of the foot, moving the cable left or right. The steersman may row at bow, who has the best vision when looking over their shoulder, or on straighter courses stroke may steer, since they can point the stern of the boat at some landmark at the start of the course. The equivalent boat when it is steered by a coxswain is called a "coxed four". Racing boats (often called "shells") are long, narrow, and broadly semi-circular in cross-section with gradual tapers, causing little dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweep (rowing)
Sweep rowing is one of two disciplines of the sport of rowing. In sweep rowing each rower has one oar, usually held with both hands. As each rower has only one oar, the rowers have to be paired so that there is an oar on each side of the boat. In the United Kingdom, rowing generally refers to sweep rowing only. The term pulling was also used historically.W B Woodgate ''Boating'' Read Books, 2008 In the other rowing discipline, sculling, each rower holds two oars, one in each hand. Sweep or single oar rowing has a long history and was the means of propulsion for Greek triremes and Viking longboats. These boats were wide enough for the pairs of rowers to sit alongside each other. Boats can go faster, the narrower they are, because a smaller cross-sectional area reduces drag and wave drag and gives a sharper angle to the bow. The hulls can be kept narrower by attaching riggers to the gunwales, so that the oarlocks can be placed farther out to carry longer oars. A narrower hull me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Germany
West Germany is the colloquial term used to indicate the Federal Republic of Germany (FRG; german: Bundesrepublik Deutschland , BRD) between its formation on 23 May 1949 and the German reunification through the accession of East Germany on 3 October 1990. During the Cold War, the western portion of Germany and the associated territory of West Berlin were parts of the Western Bloc. West Germany was formed as a political entity during the Allied occupation of Germany after World War II, established from eleven states of Germany, states formed in the three Allied zones of occupation held by the United States, the United Kingdom, and France. The FRG's provisional capital was the city of Bonn, and the Cold War era country is retrospectively designated as the Bonn Republic. At the onset of the Cold War, Europe was divided between the Western and Eastern Bloc, Eastern blocs. Germany was divided into the two countries. Initially, West Germany claimed an exclusive mandate for all of Ger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mâcon
Mâcon (), historically anglicised as Mascon, is a city in east-central France. It is the prefecture of the department of Saône-et-Loire in Bourgogne-Franche-Comté. Mâcon is home to near 34,000 residents, who are referred to in French as Mâconnais. The city gave its name to the nearby vineyards and wine 'appellation'. Geography The city lies on the western bank of the river Saône, between Bresse in the east and the Beaujolais hills in the south. Mâcon is the southernmost city in the department of Saône-et-Loire and the region of Bourgogne-Franche-Comté. It is north of Lyon and from Paris. The climate is temperate with a slight continental tendency. Climate Mâcon features an oceanic climate (Köppen: ''Cfb''), with warm summers, slightly too cool to be called humid subtropical (''Cfa''). Winters are relatively cold to French standards, but milder and more rainy than north of Mâcon. Most precipitation is in spring and autumn. History Ancient and Medieval era ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Rowing Championships
The European Rowing Championships is an international Rowing regatta organised by FISA (the International Rowing Federation) for European rowing nations, plus Israel which, though not a member of the European federation is treated as a European nation for competition purposes. The championships date back to 1893, the year after FISA was founded. Over time, the competition grew in status and as it was not restricted to European countries, became regarded as the quasi-world championships. The World Rowing Championships were commenced in 1962 and the last European Championships were held in 1973 as from 1974, the World Championships became an annual event. The European Championships were re-introduced in 2007 but with a narrower focus on Europe. History The first regatta held as a European Rowing Championships was held in 1893 and these continued annually until 1913; the 1914 to 1919 events did not occur due to World War I. The annual schedule was next interrupted in 1928 when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellipse
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special type of ellipse in which the two focal points are the same. The elongation of an ellipse is measured by its eccentricity e, a number ranging from e = 0 (the limiting case of a circle) to e = 1 (the limiting case of infinite elongation, no longer an ellipse but a parabola). An ellipse has a simple algebraic solution for its area, but only approximations for its perimeter (also known as circumference), for which integration is required to obtain an exact solution. Analytically, the equation of a standard ellipse centered at the origin with width 2a and height 2b is: : \frac+\frac = 1 . Assuming a \ge b, the foci are (\pm c, 0) for c = \sqrt. The standard parametric equation is: : (x,y) = (a\cos(t),b\sin(t)) \quad \text \quad 0\leq t\leq 2\pi. Ellipses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetrical
Symmetry (from grc, συμμετρία "agreement in dimensions, due proportion, arrangement") in everyday language refers to a sense of harmonious and beautiful proportion and balance. In mathematics, "symmetry" has a more precise definition, and is usually used to refer to an object that is invariant under some transformations; including translation, reflection, rotation or scaling. Although these two meanings of "symmetry" can sometimes be told apart, they are intricately related, and hence are discussed together in this article. Mathematical symmetry may be observed with respect to the passage of time; as a spatial relationship; through geometric transformations; through other kinds of functional transformations; and as an aspect of abstract objects, including theoretic models, language, and music. This article describes symmetry from three perspectives: in mathematics, including geometry, the most familiar type of symmetry for many people; in science and nature; a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croker Oars
Croker Oars is an Australian manufacturer of rowing oars that was started by Howard Croker OAM in Sydney, Australia. They are now manufactured on Oxley Island, Taree, on the banks of the lower Manning River, in New South Wales. During the 1950s, Croker and his two brothers were students at Newington College and their father was a rowing coach at the school. Howard Croker went on to be a successful rower in the 1960s, winning both State and National rowing titles. Croker rowed for the then Haberfield Rowing Club at Dobroyd Point and was a coach in the years 1975 and 1976 at The Scots College. Croker Oars currently produce sculling and sweep oars for the Australian and international market. Croker also manufactures surf boat oars. Many elite rowers use Croker oars and together with Concept2 Concept2, Inc. is an American manufacturer of rowing equipment and exercise machines that is based in Morrisville, Vermont. It is best known for its air resistance indoor rowing mach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Coxless Four")
.svg "Click for more on -> Symmetrical")