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Armstrong Gun
An Armstrong gun was a type of rifled breech-loading field and heavy artillery piece designed by Sir William Armstrong. It was first manufactured in England starting in 1855 by the Elswick Ordnance Company and the Royal Arsenal at Woolwich. The Armstrong gun employed a distinctive built-up gun construction method. The core of the gun consisted of a wrought iron (and later, mild steel) inner tube, which was reinforced by a series of wrought-iron coils shrunk over it. This design kept the inner tube under constant compression, increasing its strength and resistance to internal pressure generated during firing. The Armstrong rifled breechloading guns of the 1850s-1860s In 1854, Armstrong approached the Secretary of State for War with a proposal to construct a rifled breech-loading 3-pounder gun for evaluation. The gun was later modified to a 5-pounder, and the design proved successful in terms of both range and accuracy. Over the next three years, Armstrong further developed h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy
The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early Middle Ages, medieval period, the first major maritime engagements were fought in the Hundred Years' War against Kingdom of France, France. The modern Royal Navy traces its origins to the English Navy of the early 16th century; the oldest of the British Armed Forces, UK's armed services, it is consequently known as the Senior Service. From the early 18th century until the World War II, Second World War, it was the world's most powerful navy. The Royal Navy played a key part in establishing and defending the British Empire, and four Imperial fortress colonies and a string of imperial bases and coaling stations secured the Royal Navy's ability to assert naval superior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squeeze Bore
A squeeze bore, alternatively taper-bore, cone barrel or conical barrel, is a weapon where the internal gun barrel, barrel diameter progressively decreases towards the muzzle (firearms), muzzle, resulting in a reduced final internal diameter. These weapons are used in conjunction with special sub-caliber ammunition where the projectile is fitted with soft-metal flanges which fills out the caliber. As the projectile travels through the squeeze bore, the flanges fold inwards, resulting in a reduced caliber round with an increased velocity compared to a traditional full-caliber round. Mechanism A squeeze bore utilizes the energy of the propellant to squeeze the diameter of the bullet or shell (projectile), shell down, increasing penetration and velocity significantly. This process also means high chamber pressure and low barrel service life. For example, the service life of a squeeze bore 7.5 cm Pak 41 could be as low as 1000 rounds compared to 5000–7000 rounds for the 7.5 cm Pak 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millboard
Paperboard is a thick paper-based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker (usually over 0.30 mm, 0.012 in, or 12 points) than paper and has certain superior attributes such as foldability and rigidity. According to ISO standards, paperboard is a paper with a grammage above 250 g/m2, but there are exceptions. Paperboard can be single- or multi-ply. Paperboard can be easily cut and formed, is lightweight, and because it is strong, is used in packaging. Another end-use is high quality graphic printing, such as book and magazine covers or postcards. Paperboard is also used in fine arts for creating sculptures. Sometimes it is referred to as '' cardboard'', which is a generic, lay term used to refer to any heavy paper pulp–based board, however this usage is deprecated in the paper, printing, and packaging industries as it does not adequately describe each product type. History In 1817, the first paperboard car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tallow
Tallow is a rendered form of beef or mutton suet, primarily made up of triglycerides. In industry, tallow is not strictly defined as beef or mutton suet. In this context, tallow is animal fat that conforms to certain technical criteria, including its melting point. Commercial tallow commonly contains fat derived from other animals, such as lard from pigs, or even from plant sources. The solid material remaining after rendering is called cracklings, greaves, or graves. It has been used mostly for animal food, such as dog food. In the soap industry and among soap-making hobbyists, the name tallowate is used informally to refer to soaps made from tallow. Sodium tallowate, for example, is obtained by reacting tallow with sodium hydroxide (lye, caustic soda) or sodium carbonate (washing soda). It consists chiefly of a variable mixture of sodium salts of fatty acids, such as oleic and palmitic.Ruth Winter (2007): ''A Consumerýs Dictionary of Household, Yard and Office ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Ordnance Terms
This article explains terms used for the British Armed Forces' Materiel, ordnance (weapons) and ammunition. The terms may have different meanings depending on their usage in another country's military. BD Between decks: applies to a naval gun mounting in which part of the rotating mass is below the deck, and part of it is above the deck. This allows for a lower profile for a gun turret, turret, meaning that the turrets need not be superfiring (i.e. they can be mounted on the same deck and not obstruct each other at high angles of elevation). BL The term BL, in its general sense, stood for breech loading, and contrasted with muzzle loading. The shell was loaded via the breech (i.e. the gunner's end of the barrel, which opened) followed by the propellant charge, and the breech mechanism was closed to seal the chamber. Breech loading, in its formal British ordnance sense, served to identify the gun as the type of Rifled breech-loader, rifled breechloading gun for which the powder c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Cavalli
Lieutenant general Giovanni Cavalli (Novara, 23 July 1808 – Turin, 23 December 1879) was an Italian soldier, artillerist and inventor. He is credited with the creation of the first successful rifled breech loader gun. Biography He entered the Royal Academy of Turin in 1818, and graduated from it in 1828 as first of his class, with the rank of lieutenant. He worked on ways to reform and improve the work of artillerist and pontoneers, detailing proposals to change size and duties of gun crews, the procedures to drill them, among others. Then-captain Cavalli's first design for a breech-loading gun dated from 1832, but initially it was met with indifference; only in 1843 his proposal sparked some interest, and he was sent to Sweden to oversee the construction of an experimental rifled gun to his specifications. He met there and collaborated with Baron Martin von Wahrendorff, and in 1846 the first trials with the gun met with resounding success. He fought in the First War of Ital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Von Wahrendorff
Martin von Wahrendorff (1789 – 1861) was a Swedish diplomat and inventor. His father Anders von Wahrendorff was the owner of the gun foundry at Åker. Wahrendorff was Grand Master of Ceremonies at the Royal Court of Sweden from 1828 to 1831 In 1837 Wahrendorff applied for patent on a new breech mechanism, later known as the Wahrendorff breech. The first breech loaded Wahrendorff gun was manufactured at Åker in 1840. In the 1840s the Sardinian major Giovanni Cavalli was sent to the Åker foundry to inspect guns that the Sardinian government had ordered. The two then started experimenting with pointed elongated lead-coated projectile A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance. Although any objects in motion through space are projectiles, they are commonly found ...s fired from rifled, breech loading, guns of Wahrendorff's design. In 1854 the Swedish Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minié Ball
The Minié ball, or Minie ball, is a type of hollow-based bullet designed by Claude-Étienne Minié for muzzle-loaded, rifled muskets. Invented in 1846 shortly followed by the Minié rifle, the Minié ball came to prominence during the Crimean War and the American Civil War where it was found to inflict significantly more serious wounds than earlier round musket balls. Both the American Springfield Model 1861 and the British Pattern 1853 Enfield rifled muskets, the most common weapons found during the American Civil War, used the Minié ball. Rifling, the addition of spiral grooves inside a gun barrel, imparts a stabilizing spin to a projectile for better external ballistics, greatly increasing the effective range and accuracy of the gun. Before the introduction of the Minié ball, which themselves needed greasing, balls had to be rammed down the barrel, sometimes with a mallet, because gunpowder residue would foul a rifled bore after a relatively small number of shots, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast Iron
Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its carbon appears: Cast iron#White cast iron, white cast iron has its carbon combined into an iron carbide named cementite, which is very hard, but brittle, as it allows cracks to pass straight through; Grey iron, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and Ductile iron, ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable iron, malleable cast irons. With its relatively low melting point, g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trunnion
A trunnion () is a cylinder, cylindrical Boss (engineering), protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. In mechanical engineering (see the Trunnion#Trunnion bearings, 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. With the creation of larger and more powerful siege guns in the early 15th century, a new way of mounting them became necessary. Stouter gun carriages were created with reinforced wheels, axles, and “trails” which extended behind the gun. Guns were now as long as in length and they were capable of shooting iron projectiles weighing from . When discharged, these wrought iron balls were comparable in range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Treadwell
Daniel Treadwell (October 10, 1791 – February 27, 1872) was an American inventor. Amongst his most important inventions are a hemp-spinning machine for the production of cordage, and a method of constructing cannon from wrought iron and steel. Biography Daniel Treadwell was born on October 10, 1791, in Ipswich, Massachusetts. His first invention, made at an early age, was a machine for making wooden screws. In 1818 he devised a new form of printing press, and in 1819 went to England, where he conceived the idea of a power press. This was completed in a year after his return, and was the first press by which a sheet was printed on this continent by other than hand power. It was widely used, and in New York City large editions of the Bible were published by its means. In 1822, in conjunction with Dr. John Ware, he founded the ''Boston Journal of Philosophy and the Arts''. Treadwell was elected a Fellow of the American Academy of Arts and Sciences in 1823. In 1825 he was employ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
