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Columbiad
The columbiad was a large-caliber, smoothbore, muzzle-loading cannon able to fire heavy projectiles at both high and low trajectory, trajectories. This feature enabled the columbiad to fire solid Round shot, shot or Shell (projectile), shell to long range of a projectile, ranges, making it an excellent seacoast defense weapon for its day. Invented by Colonel George Bomford, United States Army, in 1811, columbiads were used in seacoast defense in the United States, United States seacoast defense from the War of 1812 until the early years of the 20th century. Very few columbiads were used outside of the U.S. and Confederate Armies; nevertheless, the columbiad is considered by some as the inspiration for the later shell-only Paixhans gun, cannons developed by Frenchman Henri-Joseph Paixhans some 30 years later. History The first columbiads produced in 1811 had a diameter bore and fired a fifty-pound projectile. Although some Seacoast defense in the United States, Second System ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbiad At Fort Donelson
The columbiad was a large- caliber, smoothbore, muzzle-loading cannon able to fire heavy projectiles at both high and low trajectories. This feature enabled the columbiad to fire solid shot or shell to long ranges, making it an excellent seacoast defense weapon for its day. Invented by Colonel George Bomford, United States Army, in 1811, columbiads were used in United States seacoast defense from the War of 1812 until the early years of the 20th century. Very few columbiads were used outside of the U.S. and Confederate Armies; nevertheless, the columbiad is considered by some as the inspiration for the later shell-only cannons developed by Frenchman Henri-Joseph Paixhans some 30 years later. History The first columbiads produced in 1811 had a diameter bore and fired a fifty-pound projectile. Although some Second System forts were armed with this weapon, the Army did not widely adopt early columbiads due to initial high costs of manufacture. Only after 1844 did an eight-in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbiad 10-inch Seacoast Defense Model 1840
The columbiad was a large-caliber, smoothbore, muzzle-loading cannon able to fire heavy projectiles at both high and low trajectories. This feature enabled the columbiad to fire solid shot or shell to long ranges, making it an excellent seacoast defense weapon for its day. Invented by Colonel George Bomford, United States Army, in 1811, columbiads were used in United States seacoast defense from the War of 1812 until the early years of the 20th century. Very few columbiads were used outside of the U.S. and Confederate Armies; nevertheless, the columbiad is considered by some as the inspiration for the later shell-only cannons developed by Frenchman Henri-Joseph Paixhans some 30 years later. History The first columbiads produced in 1811 had a diameter bore and fired a fifty-pound projectile. Although some Second System forts were armed with this weapon, the Army did not widely adopt early columbiads due to initial high costs of manufacture. Only after 1844 did an eight-inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbiad 10-inch Model 1840 Side View
The columbiad was a large-caliber, smoothbore, muzzle-loading cannon able to fire heavy projectiles at both high and low trajectories. This feature enabled the columbiad to fire solid shot or shell to long ranges, making it an excellent seacoast defense weapon for its day. Invented by Colonel George Bomford, United States Army, in 1811, columbiads were used in United States seacoast defense from the War of 1812 until the early years of the 20th century. Very few columbiads were used outside of the U.S. and Confederate Armies; nevertheless, the columbiad is considered by some as the inspiration for the later shell-only cannons developed by Frenchman Henri-Joseph Paixhans some 30 years later. History The first columbiads produced in 1811 had a diameter bore and fired a fifty-pound projectile. Although some Second System forts were armed with this weapon, the Army did not widely adopt early columbiads due to initial high costs of manufacture. Only after 1844 did an eight-inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Bomford
George Bomford (1780 – March 25, 1848) was a distinguished military officer in the United States Army and an inventor and designer of weapons and defensive installations. He served as the second Chief of Ordnance for the U.S. Army Ordnance Corps. Early life and education George Bomford was born on Long Island, New York in 1780 during the American Revolutionary War, the son of a British officer, Thomas Bomford of the 60th Royal Artillery, and his wife. His birth records do not indicate an exact date of birth nor the name of his father. Bomford later told his son James the information, who reported it in records at Norwich University. By a chance meeting, Bomford befriended the first graduate of West Point Joseph Gardner Swift. Swift sought and received a "Cadet's Warrant" from General Henry Dearborn for his friend, and Bomford was appointed to West Point from the state of New York on 23 October 1804, despite the circumstances of his birth. Career After graduating from United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seacoast Defense In The United States
Seacoast defense was a major concern for the United States from its independence until World War II. Before Military aviation, airplanes, many of America's enemies could only reach it from the sea, making coastal forts an economical alternative to Standing army, standing armies or a large navy. After the 1940s, it was recognized that fixed fortifications were obsolete and ineffective against aircraft and missiles. However, in prior eras foreign fleets were a realistic threat, and substantial fortifications were built at key locations, especially protecting major harbors. The defenses heavily depended on fortifications but also included Submarine mines in United States harbor defense, submarine minefields, nets and boom (navigational barrier), booms, ships, and airplanes. Therefore, all of the armed forces participated in seacoast defense, but the United States Army Corps of Engineers, U.S. Army Corps of Engineers played the central role in constructing fixed defenses. Designs evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seacoast Defense In The United States
Seacoast defense was a major concern for the United States from its independence until World War II. Before Military aviation, airplanes, many of America's enemies could only reach it from the sea, making coastal forts an economical alternative to Standing army, standing armies or a large navy. After the 1940s, it was recognized that fixed fortifications were obsolete and ineffective against aircraft and missiles. However, in prior eras foreign fleets were a realistic threat, and substantial fortifications were built at key locations, especially protecting major harbors. The defenses heavily depended on fortifications but also included Submarine mines in United States harbor defense, submarine minefields, nets and boom (navigational barrier), booms, ships, and airplanes. Therefore, all of the armed forces participated in seacoast defense, but the United States Army Corps of Engineers, U.S. Army Corps of Engineers played the central role in constructing fixed defenses. Designs evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arc (geometry)
In mathematics, a curve (also called a curved line in older texts) is an object similar to a line, but that does not have to be straight. Intuitively, a curve may be thought of as the trace left by a moving point. This is the definition that appeared more than 2000 years ago in Euclid's ''Elements'': "The urvedline is €¦the first species of quantity, which has only one dimension, namely length, without any width nor depth, and is nothing else than the flow or run of the point which €¦will leave from its imaginary moving some vestige in length, exempt of any width." This definition of a curve has been formalized in modern mathematics as: ''A curve is the image of an interval to a topological space by a continuous function''. In some contexts, the function that defines the curve is called a ''parametrization'', and the curve is a parametric curve. In this article, these curves are sometimes called ''topological curves'' to distinguish them from more constrained curves such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traverse (gunnery)
Traverse may refer to: * Traverse (climbing), skiing, and in the engineering of roads into slopes * Traverse (surveying), a method of establishing basic points in the field * Movement of a machine slide on a machine tool * Traverse stage, a style of theatre seating or performance Other meanings: * TRAVERSE (software), accounting and business software * Traverse (gunnery), the horizontal field of fire of an artillery piece * Traverse (trench warfare), a development in trench design * Traverse (fortification), a mass of earth behind a military parapet * ''Traverse'' (magazine), a Northern Michigan regional monthly * Chevrolet Traverse, a 2009 sport-utility vehicle * Traverse County, Minnesota, a county in Minnesota * Traverse City, Michigan * Traverse, Michigan, an unincorporated community * Traverse Theatre, writing theatre in Scotland * Traverse Town, a fictional city in some Kingdom Hearts series video games * Traverse (common law), a pleading In law as practiced in countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotation
Rotation, or spin, is the circular movement of an object around a '' central axis''. A two-dimensional rotating object has only one possible central axis and can rotate in either a clockwise or counterclockwise direction. A three-dimensional object has an infinite number of possible central axes and rotational directions. If the rotation axis passes internally through the body's own center of mass, then the body is said to be ''autorotating'' or '' spinning'', and the surface intersection of the axis can be called a ''pole''. A rotation around a completely external axis, e.g. the planet Earth around the Sun, is called ''revolving'' or ''orbiting'', typically when it is produced by gravity, and the ends of the rotation axis can be called the ''orbital poles''. Mathematics Mathematically, a rotation is a rigid body movement which, unlike a translation, keeps a point fixed. This definition applies to rotations within both two and three dimensions (in a plane and in space, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam (structure)
A beam is a structural element that primarily resists Structural load, loads applied laterally to the beam's axis (an element designed to carry primarily axial load would be a strut or column). Its mode of Deflection (engineering), deflection is primarily by bending. The loads applied to the beam result in reaction forces at the beam's support points. The total effect of all the forces acting on the beam is to produce shear forces and bending moments within the beams, that in turn induce internal stresses, strains and deflections of the beam. Beams are characterized by their manner of support, profile (shape of cross-section), equilibrium conditions, length, and their material. Beams are traditionally descriptions of building or civil engineering structural elements, where the beams are horizontal and carry vertical loads. However, any structure may contain beams, for instance automobile frames, aircraft components, machine frames, and other mechanical or structural systems. In th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Track
A railway track (British English and UIC terminology) or railroad track (American English), also known as permanent way or simply track, is the structure on a railway or railroad consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll upon. Early tracks were constructed with wooden or cast iron rails, and wooden or stone sleepers; since the 1870s, rails have almost universally been made from steel. Historical development The first railway in Britain was the Wollaton Wagonway, built in 1603 between Wollaton and Strelley in Nottinghamshire. It used wooden rails and was the first of around 50 wooden-railed tramways built over the next 164 years. These early wooden tramways typically used rails of oak or beech, attached to wooden sleepers with iron or wooden nails. Gravel or small stones were packed around the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inclined Plane
An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists. Inclined planes are used to move heavy loads over vertical obstacles. Examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade. Moving an object up an inclined plane requires less force than lifting it straight up, at a cost of an increase in the distance moved. The mechanical advantage of an inclined plane, the factor by which the force is reduced, is equal to the ratio of the length of the sloped surface to the height it spans. Owing to conservation of energy, the same amount of mechanical energy (work) is required to lift a given object by a given vertical distance, disregarding losses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
