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Norman Wiard
The Wiard rifle refers to several weapons invented by Norman Wiard, most commonly a semi-steel light artillery piece in six-pounder and twelve-pounder calibers. About 60 were manufactured between 1861 and 1862 during the American Civil War, at O'Donnell's Foundry, New York City: "although apparently excellent weapons, heydo not seem to have been very popular". Wiard also designed a rifled steel version of the Dahlgren boat howitzer (a 12-pounder (5.44 kg) weapon with a bore), among other gun types.Olmstead 1997, pp. 177-178 Further, Wiard unsuccessfully attempted to develop a rifled gun for the US Navy and proposed a gun. In 1881 he unsuccessfully proposed various "combined rifle and smoothbore" weapon conversions of Rodman guns and Parrott rifles.Olmstead 1997, pp. 144-146 Wiard described two calibers: a six-pounder (2.72 kg) rifle with a bore, and a twelve-pounder (5.44 kg) smoothbore weapon with a bore. All survivors are rifled, though this may have occurred long af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wiard Gun
The Wiard rifle refers to several weapons invented by Norman Wiard, most commonly a semi-steel light artillery piece in six-pounder and twelve-pounder calibers. About 60 were manufactured between 1861 and 1862 during the American Civil War, at O'Donnell's Foundry, New York City: "although apparently excellent weapons, heydo not seem to have been very popular". Wiard also designed a rifled steel version of the Dahlgren boat howitzer (a 12-pounder (5.44 kg) weapon with a bore), among other gun types.Olmstead 1997, pp. 177-178 Further, Wiard unsuccessfully attempted to develop a rifled gun for the US Navy and proposed a gun. In 1881 he unsuccessfully proposed various "combined rifle and smoothbore" weapon conversions of Rodman guns and Parrott rifles.Olmstead 1997, pp. 144-146 Wiard described two calibers: a six-pounder (2.72 kg) rifle with a bore, and a twelve-pounder (5.44 kg) smoothbore weapon with a bore. All survivors are rifled, though this may have occurred long afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trunnion
A trunnion (from Old French "''trognon''", trunk) is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. Alternatively, a trunnion is a shaft that positions and supports a tilting plate. This is a misnomer, as in reality it is a cradle for the true trunnion. In mechanical engineering (see the trunnion bearing section below), it is one part of a rotating joint where a shaft (the trunnion) is inserted into (and turns inside) a full or partial cylinder. Medieval history In a cannon, the trunnions are two projections cast just forward of the center of mass of the cannon and fixed to a two-wheeled movable gun carriage. As they allowed the muzzle to be raised and lowered easily, the integral casting of trunnions is seen by military historians as one of the most important advances in early field artillery. With the creation of larger and more powerful siege guns in the early 15th century, a n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Museum Of The United States Navy
The National Museum of the United States Navy, or U.S. Navy Museum for short, is the flagship museum of the United States Navy and is located in the former Breech Mechanism Shop of the old Naval Gun Factory on the grounds of the Washington Navy Yard in Washington, D.C., United States. The U.S. Navy Museum is one of ten official Navy museums,. The U. S. Navy Memorial Museum, Washington, D.C., is not on this list of U.S. Navy museums. and is part of the Naval History & Heritage Command, the official history program of the United States Navy. Mission The U.S. Navy Museum collects, preserves, displays, and interprets historic naval artifacts and artwork to inform, educate, and inspire naval personnel and the general public. History The U.S. Navy Museum was established in 1961 and opened to the public in 1963. As one of 15 Navy museums throughout the country, it is the only one that presents an overview of U. S. naval history. Permanent and temporary exhibitions commemor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stones River National Battlefield
Stones River National Battlefield, a park along the Stones River in Rutherford County, Tennessee, three miles (5 km) northwest of Murfreesboro and twenty-eight miles southeast of Nashville, memorializes the Battle of Stones River. This key battle of the American Civil War occurred on December 31, 1862 and January 2, 1863, and resulted in a strategic Union victory. Creation of the National Battlefield The national battlefield was established through the efforts of both private individuals, the Stones River Battlefield and Park Association, the Nashville, Chattanooga and St. Louis Railway (in 2011, part of CSX Transportation), and a 1927 act of Congress authorizing a national military park under the jurisdiction of the War Department.Styles, 1. During the early years of the twentieth century, the railroad emphasized the battlefield as a destination to increase passenger traffic. It promoted veteran reunions and acquired parts of the battlefield as points of historical i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shiloh National Military Park
Shiloh National Military Park preserves the American Civil War Shiloh and Corinth battlefields. The main section of the park is in the unincorporated town of Shiloh, about nine miles (14 km) south of Savannah, Tennessee, with an additional area located in the city of Corinth, Mississippi, 23 miles (37 km) southwest of Shiloh. The Battle of Shiloh (April 6–7, 1862) began a six-month struggle for the key railroad junction at Corinth. Afterward, Union forces marched from Pittsburg Landing to take Corinth in a May siege, then withstood an October Confederate counter-attack. The visitor center provides exhibitions, films and a self-guided auto-tour. Shiloh battlefield The Battle of Shiloh was one of the first major battles in the Western Theater of the American Civil War. The two-day battle, April 6–7, 1862, involved about 65,000 Union troops under Ulysses S. Grant and Don Carlos Buell and 44,000 Confederates under Albert Sidney Johnston (killed in the b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Sill
Fort Sill is a United States Army post north of Lawton, Oklahoma, about 85 miles (136.8 km) southwest of Oklahoma City. It covers almost . The fort was first built during the Indian Wars. It is designated as a National Historic Landmark and serves as home of the United States Army Field Artillery School as well as the Marine Corps' site for Field Artillery MOS school, United States Army Air Defense Artillery School, the 31st Air Defense Artillery Brigade, and the 75th Field Artillery Brigade. Fort Sill is also one of the four locations for Army Basic Combat Training. It has played a significant role in every major American conflict since 1869.Janda, Lanceof Oklahoma History and Culture''. "Fort Sill."Retrieved 16 December 2013. History The site of Fort Sill was staked out on 8 January 1869, by Maj. Gen. Philip H. Sheridan, who led a campaign into Indian Territory to stop tribes from raiding border settlements in Texas and Kansas. Sheridan's massive winter campaign inv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uniontown, Pennsylvania
Uniontown is a city in Fayette County, Pennsylvania, United States, southeast of Pittsburgh and part of the Greater Pittsburgh Region. The population was 10,372 at the 2010 census, down from 12,422 at the 2000 census. It is the county seat and largest city of Fayette County. History Uniontown was founded by Henry Beeson on July 4, 1776. This was, coincidentally, the same date the United States Declaration of Independence was adopted. The National Road, also known as the Cumberland Road, was routed through Uniontown in the early 19th century, and the town grew along with the road (now US 40). southeast of Uniontown is Fort Necessity, built by George Washington during the French and Indian War (part of the international Seven Years' War) as well as the site of the Battle of Jumonville Glen, where the North American branch of the war began. Uniontown's role in the Underground Railroad in the antebellum years is commemorated by a marker on the corner of East Main Street and B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breechloading
A breechloader is a firearm in which the user loads the ammunition (cartridge or shell) via the rear (breech) end of its barrel, as opposed to a muzzleloader, which loads ammunition via the front ( muzzle). Modern firearms are generally breech-loading – except for replicas of vintage weapons. Early firearms before the mid-19th century were almost entirely muzzle-loading. Mortars and the Russian GP-25 grenade launcher are the only muzzleloaders remaining in frequent modern usage. However, referring to a weapon specifically as breech loading is mostly limited to single-shot or otherwise non-repeating firearms, such as double-barreled shotguns. Breech-loading provides the advantage of reduced reloading time, because it is far quicker to load the projectile and propellant into the chamber of a gun/cannon than to reach all the way over to the front end to load ammunition and then push them back down a long tube – especially when the projectile fits tightly and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast Artillery
Coastal artillery is the branch of the armed forces concerned with operating anti-ship artillery or fixed gun batteries in coastal fortifications. From the Middle Ages until World War II, coastal artillery and naval artillery in the form of cannons were highly important to military affairs and generally represented the areas of highest technology and capital cost among materiel. The advent of 20th-century technologies, especially military aviation, naval aviation, jet aircraft, and guided missiles, reduced the primacy of cannons, battleships, and coastal artillery. In countries where coastal artillery has not been disbanded, these forces have acquired amphibious capabilities. In littoral warfare, mobile coastal artillery armed with surface-to-surface missiles can still be used to deny the use of sea lanes. It was long held as a rule of thumb that one shore-based gun equaled three naval guns of the same caliber, due to the steadiness of the coastal gun which allowed for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casting Core
A core is a device used in casting and moulding processes to produce internal cavities and reentrant angles (an interior angle that is greater than 180°). The core is normally a disposable item that is destroyed to get it out of the piece.. They are most commonly used in sand casting, but are also used in die casting and injection moulding. For example, cores define multiple passages inside cast engine blocks. One model of GM V-8 engine requires 5 dry-sand cores for every casting. Materials required to make cores *Core sand *Bentonite clay *Pulverized coal *Resin oil Advantages and disadvantages Cores are useful for features that cannot tolerate draft or to provide detail that cannot otherwise be integrated into a core-less casting or mold. The main disadvantage is the additional cost to incorporate cores. Requirements There are seven requirements for cores: #Green strength: In the green condition, there must be adequate strength for handling #In the hardened state, it must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluting (firearms)
In firearms terminology, fluting refers to the removal of material from a cylindrical surface, usually creating grooves. This is most often the barrel of a rifle, though it may also refer to the cylinder of a revolver or the bolt of a bolt action rifle. In contrast to rifle barrels and revolver cylinders, rifle bolts are normally helically fluted, though helical fluting is sometimes also applied to rifle barrels. The main purpose of fluting is to reduce weight, and to a lesser extent increase rigidity for a given total weight or increase surface area to make the barrels less susceptible for overheating for a given total weight. However, for a given diameter, while a fluted barrel may cool more quickly, a non-fluted barrel will be stiffer and be able to absorb a larger amount of total heat at the price of additional total weight. In barrel chamber In the barrel chamber, fluting refers to gas relief flutes/grooves used to ease the extraction of cartridges. They may also come ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John A
Sir John Alexander Macdonald (January 10 or 11, 1815 – June 6, 1891) was the first prime minister of Canada, serving from 1867 to 1873 and from 1878 to 1891. The dominant figure of Canadian Confederation, he had a political career that spanned almost half a century. Macdonald was born in Scotland; when he was a boy his family immigrated to Kingston in the Province of Upper Canada (today in eastern Ontario). As a lawyer, he was involved in several high-profile cases and quickly became prominent in Kingston, which elected him in 1844 to the legislature of the Province of Canada. By 1857, he had become premier under the colony's unstable political system. In 1864, when no party proved capable of governing for long, Macdonald agreed to a proposal from his political rival, George Brown, that the parties unite in a Great Coalition to seek federation and political reform. Macdonald was the leading figure in the subsequent discussions and conferences, which resulted in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
