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Heavy Machine Guns
A heavy machine gun (HMG) is significantly larger than light machine gun, light, medium machine gun, medium or general-purpose machine guns. HMGs are typically too heavy to be man-portable (carried by one person) and require weapon mount, mounting onto a weapons platform to be operably stable or tactically mobility (military), mobile, have more formidable firepower, and generally Crew-served weapon, require a team of personnel for operation and maintenance. There are two classes of weapons generally defined as HMGs: * The historical definition refers to machine guns, typically chambered in standard full-power cartridges, that are identified as being "heavy" due to their weight and cumbersomeness, which prevents infantrymen from transporting them on foot. Examples include the Maxim machine gun and M1917 Browning machine gun. * The modern definition refers to "heavy caliber" machine guns, pioneered by the German Empire's MG 18 TuF which was a Maxim derivative chambered in 13.2×92mm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M2 Machine Gun
The M2 machine gun or Browning .50-caliber machine gun (informally, "Ma Deuce") is a heavy machine gun that was designed near the end of World War I by John Browning. While similar to Browning's M1919 Browning machine gun, which was chambered for the .30-06 cartridge, the M2 uses Browning's larger and more powerful .50 BMG (12.7 mm) cartridge. The design has had many designations; the official U.S. military designation for the infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It has been used against infantry, light armored vehicles, watercraft, light fortifications, and low-flying aircraft. The gun has been used extensively as a vehicle weapon and for aircraft armament by the United States since the 1930s. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Soviet–Afghan War, the Gulf War, the Iraq War, and the War in Afghanistan. It is the primary heavy machine gun of NATO countries and has been used by many o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stopping Power
Stopping power is the supposed ability of a weapon – typically a ranged weapon such as a firearm – to cause a target (human or animal) to be incapacitated or immobilized. Stopping power contrasts with lethality in that it pertains only to a weapon's ability to make the target cease action, regardless of whether or not death ultimately occurs. Which ammunition cartridge (firearms), cartridges have the greatest stopping power is a much-debated topic. Stopping power is related to the physical properties and terminal ballistics, terminal behavior of the projectile (bullet, shot (pellet), shot, or shotgun slug, slug), the biology of the target, and the wound location, but the issue is complicated and not easily studied. Although higher-caliber ammunitions usually have greater muzzle energy and momentum and thus traditionally been widely associated with higher stopping power, the physics involved are multifactorial, with caliber, muzzle velocity, bullet mass, bullet shape and bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiram Maxim
Sir Hiram Stevens Maxim (5 February 1840 – 24 November 1916) was an American-born British inventor best known as the creator of the first automatic machine gun, the Maxim gun. Maxim held patents on numerous mechanical devices such as hair-curling irons, a mousetrap, and steam pumps. Maxim laid claim to inventing the lightbulb. Maxim experimented with powered flight; his large aircraft designs were never successful. Circa 1904 he designed a highly successful amusement ride called the "Captive Flying Machine" to fund his research while generating public interest in flight. Maxim moved from the United States to the United Kingdom at the age of 41, and remained an American citizen until he became a naturalised British citizen in 1899, and received a knighthood in 1901. Birth and early life Maxim was born in Sangerville, Maine on 5 February 1840, into a family of French Huguenot origin. He became an apprentice Coach (vehicle), coachbuilder at the age of 14 and ten yea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxim Gun
The Maxim gun is a Recoil operation, recoil-operated machine gun invented in 1884 by Hiram Maxim, Hiram Stevens Maxim. It was the first automatic firearm, fully automatic machine gun in the world. The Maxim gun has been called "the weapon most associated with imperial conquest" by historian Martin Gilbert, and was heavily used by Colonialism, colonial powers during the "Scramble for Africa". Afterwards, Maxim guns also saw extensive usage by different armies during the Russo-Japanese War, the World War I, First and World War II, Second World Wars, as well as in contemporary conflicts. The Maxim gun was greatly influential in the development of machine guns, and it has multiple variants and derivatives. Design The Maxim gun featured one of the earliest recoil-operated firing systems in history. Energy from recoil acting on the breech block is used to eject each spent cartridge and insert the next one. Maxim's earliest designs used a 360-degree rotating cam to reverse the move ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water-cooling
Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and non-toxic; however, it can contain impurities and cause corrosion. Water cooling is commonly used for cooling automobile internal combustion engines and power stations. Water coolers utilising convective heat transfer are used inside high-end personal computers A personal computer, commonly referred to as PC or computer, is a computer designed for individual use. It is typically used for tasks such as Word processor, word processing, web browser, internet browsing, email, multimedia playback, and PC ... to lower the temperature of CPUs and other components. Other uses include the cooling of lubricant oil in pumps; for cooling purposes in heat exchangers; for cooling buildings in Heating, ventilation, and air conditioning, HVAC and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rifle Cartridge
A rifle cartridge is a firearm cartridge (firearms), cartridge primarily designed and intended for use in a rifle/carbine, or machine gun. Types Full-powered A full-powered cartridge is a rifle cartridge used interchangeably between service rifles, sniper rifles, and general purpose machine guns. It is a retronym for rifle cartridges used prior to and during World War II. They are primarily used today in general purpose machine guns, designated marksman rifles, and sniper rifles. Magnum A magnum cartridge is a cartridge with a larger case size than, or derived from, a similar cartridge of the same bullet caliber and case shoulder shape. Magnum cartridges allow for more propellant to be loaded within the casing, and thus have a higher muzzle energy. Modern magnum rifle cartridges include .300 RUM, 7mm Remington Magnum, .300 Weatherby Magnum, .460 Weatherby Magnum, .300 Winchester Magnum, .338 Lapua Magnum or .338 Norma Magnum. Today they are primarily used in civilian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recoil
Recoil (often called knockback, kickback or simply kick) is the rearward thrust generated when a gun is being discharged. In technical terms, the recoil is a result of conservation of momentum, for according to Newton's third law the force required to accelerate something will evoke an equal but opposite reactional force, which means the forward momentum gained by the projectile and exhaust gases (ejectae) will be mathematically balanced out by an equal and opposite momentum exerted back upon the gun. Basics Any launching system (weapon or not) generates recoil. However recoil only constitutes a problem in the field of artillery and firearms due to the magnitude of the forces at play. Gun chamber pressures and projectile acceleration forces are tremendous, on the order of tens to hundreds mega pascalAs a perspective, the atmospheric pressure is roughly 0.1 megapascal. and tens of thousands of times the acceleration of gravity ( g's), both necessary to launch the projectile a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squad Automatic Weapon
A squad automatic weapon (SAW), also known as a section automatic weapon or light support weapon (LSW), is a man-portable automatic firearm attached to infantry squads or sections as a source of rapid direct firepower. Weapons fulfilling this role can be light machine guns, or modified selective-fire rifles fitted with a heavier barrel, bipod and a belt/ drum-fed design. Squad automatic weapons usually fire the same cartridge (though heavier- bullet variants are preferred) as the assault rifles or battle rifles carried by other members of the unit. This reduces logistical requirements by making it only necessary to supply one type of service ammunition to a unit. These weapons are light enough to be carried and operated by one infantryman, unlike medium machine guns (such as the M1919 Browning) that require a crew to operate at full effectiveness; or heavy machine guns (such as the M2 Browning or the DShK) which fire more powerful cartridges but are also crew-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assault Rifle
An assault rifle is a select fire rifle that uses an intermediate cartridge, intermediate-rifle cartridge and a Magazine (firearms), detachable magazine.C. Taylor, ''The Fighting Rifle: A Complete Study of the Rifle in Combat'', F.A. Moyer ''Special Forces Foreign Weapons Handbook'', R.J. Scroggie, F.A. Moyer ''Special Forces Combat Firing Techniques'', Musgave, Daniel D., and Thomas B. Nelson, ''The World's Assault Rifles'', vol. II, The Goetz Company, Washington, D.C. (1967): 1 Assault rifles were first put into mass production and accepted into widespread service during World War II. The first assault rifle to see major usage was the German StG 44, a development of the earlier Maschinenkarabiner 42(H), Mkb 42.''Firearms: The Life Story of a Technology'', by Roger Pauly. Greenwood Publishing Group. 2004. pp. 145–146 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intermediate Cartridge
An intermediate cartridge is a rifle/ carbine cartridge that has significantly greater power than a pistol cartridge but still has a reduced muzzle energy compared to fully powered cartridges (such as the .303 British, 7.62×54mmR, 7.65×53mm Mauser, 7.92×57mm Mauser, 7.7×58mm Arisaka, , or 7.62×51mm NATO), and therefore is regarded as being "intermediate" between traditional rifle and handgun cartridges. As their recoil is significantly reduced compared to full-power cartridges, fully automatic rifles firing intermediate cartridges are relatively easy to control. However, even though they are less powerful than a traditional full-power cartridge, the external ballistics are still sufficient for an effective range of , which covers most typical infantry engagement situations in modern warfare. This allowed for the development of the assault rifle, a type of versatile selective fire small arms that is lighter and more compact than traditional battle rifles that fire f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium Machine Gun
A medium machine gun (MMG), in modern terms, usually refers to a belt-fed machine gun firing a full-powered rifle cartridge, and is considered "medium" in weight (). Medium machine guns are light enough to be infantry-portable (as opposed to a heavy machine gun, which completely relies on mounting onto a weapons platform for operational stability and mobility), but still cumbersome enough to require a crew for optimal operational efficiency (as opposed to a light machine gun, which can be operated to full capacity by only a single gunner). History Late 19th century In the late 19th century, Gatling guns and other externally powered types, such as the Nordenfelt, were often made in different ranges of calibers, such as half-inch and one-inch. Thanks to their many barrels, overheating was not a major issue, and they were also quite heavy, being, essentially, heavy machine guns. When Hiram Maxim developed his recoil-powered machine gun that used a single barrel, the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Rifle
A battle rifle is a service rifle chambered to fire a fully powered cartridge. The term "battle rifle" is a retronym created largely out of a need to differentiate automatic rifles chambered for fully powered cartridges from automatic rifles chambered for intermediate cartridges, which were later categorized as assault rifles. Battle rifles were most prominent from the 1940s to the 1970s, when they were used as service rifles. While modern battle rifles largely resemble modern assault rifle designs, which replaced battle rifles in most roles, the term may also describe older military full-power semi-automatic rifles such as the M1 Garand, SVT-40, Gewehr 41, Gewehr 43, Type 4 rifle, Type 4, FN Model 1949, and MAS-49 rifle, MAS-49. History World War I Semi-automatic First examples of semi-automatic fully powered-cartridge rifles used in World War I are the Meunier rifle, Meunier A6, Fusil Automatique Modèle 1917 in 8×50mmR Lebel and the Winchester Model 1910 in .401 Wincheste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
