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SA 49
The 75 SA 49 (french: 75 mm Semi-Automatique Modèle 1949; en, 75 mm Semi-Automatic 1949 Model) is a French 75 mm low-recoil rifled gun specially designed to be mounted on the EBR eight-wheeled armored reconnaissance vehicle. History The SA 49 was made with the idea of re-using the stockpiled 75x350mm R ammunition previously used by the French 75 mm Mle 97 gun and the US 75 mm M3 and M6 guns (already used by the French Army) while featuring the same external ballistics as the latter. The development effort has been then concentrated on reducing of the recoil force and its integration in the FL 11 oscillating turret. in development as early as 1945, the French army requested a 75mm gun who was capable of 100 mm of penetration against tank at a distance of 1000 m and capable to use the WW2 ammunition. initially named in his early development the Cannon de 75 75/600, (named based on the caliber 75 mm and velocity of 600 m/sec) unable to achieve this result at such dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rifled
In firearms, rifling is machining helical grooves into the internal (bore) surface of a gun's barrel for the purpose of exerting torque and thus imparting a spin to a projectile around its longitudinal axis during shooting to stabilize the projectile longitudinally by conservation of angular momentum, improving its aerodynamic stability and accuracy over smoothbore designs. Rifling is characterized by its twist rate, which indicates the distance the rifling takes to complete one full revolution, such as "1 turn in 10 inches" (1:10 inches), "1 turn in 254 mm" ("1:254 mm" or "1:25.4 cm)", or the like. Normally, an experienced shooter can infer the units of measurement from the numbers alone. A shorter distance indicates a faster twist, meaning that for a given velocity the projectile will rotate at a higher spin rate. The combination of length, weight, and shape of a projectile determines the twist rate needed to gyroscopically stabilize it – barrels ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscillating Turret
An oscillating turret is a form of turret for armoured fighting vehicles, both tanks and armoured cars. The turret is unusual in being made of two hinged parts. Elevation of the gun relies on the upper part of the turret moving relative to the lower part. Oscillating turrets have rarely been used. Their only widespread use was on two French designs: the AMX-13 light tank and the Panhard EBR armoured car; the Austrian SK-105 Kürassier uses a turret developed from the AMX-13. Design The turret consists of upper and lower parts, joined by a trunnion. The gap between these two parts is often covered by a visible rubber or canvas bellows. The gun itself is fixed to the upper part of the turret. Elevation of the gun is achieved by tilting the entire upper part of the turret. In conventional designs, the gun is mounted inside the one-piece turret by a trunnion, and its elevation is changed by tilting on that trunnion while the turret remains in fixed position relative to the hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold War Weapons Of France
Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to on the Celsius scale, on the Fahrenheit scale, and on the Rankine scale. Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in the classical sense. The object could be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tank Guns Of France
A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and good battlefield mobility provided by tracks and a powerful engine; usually their main armament is mounted in a turret. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat. Modern tanks are versatile mobile land weapons platforms whose main armament is a large-caliber tank gun mounted in a rotating gun turret, supplemented by machine guns or other ranged weapons such as anti-tank guided missiles or rocket launchers. They have heavy vehicle armour which provides protection for the crew, the vehicle's munition storage, fuel tank and propulsion systems. The use of tracks rather than wheels provides improved operational mobility which allows the tank to overcome rugged terrain and adverse conditions such as mud and ice/snow better than wheeled vehicles, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D-56T
The 76.2 mm D-56T series rifled tank gun is the tank gun used on the PT-76, which is the only known armoured vehicle to carry it. Description The D-56T is an anti-tank gun of 76.2mm calibre. It can fire five types of rounds, using a manual loader system, it has an effective fire rate of six to eight rounds per minute. It has a max effective range of approximately 1500 meters. This gun is 42 calibers long. A typical combat ammunition load consists of 24 x OF-350 Frag-HE, 4 x sub-caliber AP-T, 4 x AP-T and 8 x BK-350M HEAT rounds. The gun is usually mounted in an oval dish-type circular truncated cone turret with flat sloping sides which is mounted over the second, third, and fourth pair of road wheels. All PT-76s have a fume extractor for the main gun at the rear of the turret. Some were fitted with a multi-slotted muzzle brake. Most PT-76s typically feature this gun with a double-baffle muzzle brake, except the PT-76B, which is typically fitted with the D-56T gun with a t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SA 50
The 75 SA 50 (french: 75 mm Semi-Automatique Modèle 1950; en, 75 mm Semi-Automatic 1950 Model) also called 75 Mle 50 or CN 75-50 is a French 75 mm high-velocity rifled gun. Although originally designed for the AMX-13 light tank, the SA 50 has also been used on the EBR wheeled reconnaissance vehicle and foreign medium tanks such as the Israeli upgraded Super Sherman. History By the end of 1944, the chief engineer Lafargue considered a more powerful alternative to the 75 mm SA 44 developed for the upcoming ARL-44 transitional tank destroyer. The new 75 mm gun should have ballistic performance similar to the German 7.5 cm KwK 42 ; which means firing a round weighing a little more than 6 kg at a muzzle velocity close to 1000 m/s. A longer gun barrel (L/70), an increased chamber volume with a higher chamber pressure were thus required to achieve such performance. The new gun was made from existing components (breech block, gun tube, ...) developed clande ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Recoil Mechanism
A hydraulic recoil mechanism is a way of limiting the effects of recoil and adding to the accuracy and firepower of an artillery piece. Description The usual recoil system in modern quick-firing guns is the hydro-pneumatic recoil system. In this system, the barrel is mounted on rails on which it can recoil to the rear, and the recoil is taken up by a cylinder which is similar in operation to an automotive gas-charged shock absorber, and is commonly visible as a cylinder mounted parallel to the barrel of the gun, but shorter and smaller than it. The cylinder contains a charge of compressed air, as well as hydraulic oil; in operation, the barrel's energy is taken up in compressing the air as the barrel recoils backward, then is dissipated via hydraulic damping as the barrel returns forward to the firing position. The recoil impulse is thus spread out over the time in which the barrel is compressing the air, rather than over the much narrower interval of time when the project ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunnite
Dunnite, also known as Explosive D or systematically as ammonium picrate, is an explosive developed in 1906 by US Army Major Beverly W. Dunn, who later served as the chief inspector of the Bureau of Transportation Explosives. Ammonium picrate is a salt formed by reacting picric acid and ammonia. It is chemically related to the more stable explosive trinitrotoluene (TNT). History It was the first explosive used in an aerial bombing operation in military history, performed by Italian pilots in Libya in 1911. It was used extensively by the United States Navy during World War I. Though Dunnite was generally considered an insensitive substance, by 1911 the United States Army had abandoned its use in favor of other alternatives. The Navy, however, used it in armor-piercing artillery shells and projectiles, and in coastal defense. Dunnite typically did not detonate on striking heavy armor. Rather, the encasing shell would penetrate the armor, after which the charge would be triggere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-explosive Anti-tank
High-explosive anti-tank (HEAT) is the effect of a shaped charge explosive that uses the Munroe effect to penetrate heavy armor. The warhead functions by having an explosive charge collapse a metal liner inside the warhead into a high-velocity explosively formed penetrator (EFP) jet; this is capable of penetrating armor steel to a depth of seven or more times the diameter of the charge (charge diameters, CD). The EFPs jet effect is purely kinetic in nature; the round has no explosive or incendiary effect on the target. Because they rely on the kinetic energy of the EFP jet for their penetration performance, HEAT warheads do not have to be delivered with high velocity, as an armor-piercing round does. Thus they generate less recoil. The performance of HEAT weapons has nothing to do with thermal effects, with HEAT being simply an acronym. History HEAT warheads were developed during World War II, from extensive research and development into shaped charge warheads. Shaped char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panhard AML
The Panhard AML (''Auto Mitrailleuse Légère'', or "Light Machine Gun Car") is an Armored car (military), armoured car with reconnaissance capability. Designed on a lightly armoured Four-wheel drive, 4×4 chassis, it weighs an estimated 5.5 tonnes, and is thus suitable for airborne deployment. Since 1959, AMLs have been marketed on up to five continents; several variants remained in continuous production for half a century. These have been operated by fifty-four national governments and other entities worldwide, seeing regular combat. The AML-245 was once regarded as one of the most heavily armed scout vehicles in service, fitted with a low velocity Nexter, DEFA D921 90 mm (3.54 in) rifled cannon firing conventional Shell (projectile)#HE-Frag, high explosive and High-explosive anti-tank warhead, high explosive anti-tank shells, or a 60 mm (2.36 in) Brandt Mle CM60A1, breech loading mortar with 53 rounds and dual 7.5mm AA-52 machine gun, MAS AA-52 NF-1 machine g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tank Gun
A tank gun is the main armament of a tank. Modern tank guns are high-velocity, large-caliber artilleries capable of firing kinetic energy penetrators, high-explosive anti-tank, and cannon-launched guided projectiles. Anti-aircraft guns can also be mounted to tanks. As the tank's primary armament, they are almost always employed in a direct fire mode to defeat a variety of ground targets at all ranges, including dug-in infantry, lightly armored vehicles, and especially other heavily armored tanks. They must provide accuracy, range, penetration, and rapid fire in a package that is as compact and lightweight as possible, to allow mounting in the cramped confines of an armored gun turret. Tank guns generally use self-contained ammunition, allowing rapid loading (or use of an autoloader). They often display a bulge in the barrel, which is a bore evacuator, or a device on the muzzle, which is a muzzle brake. History World War I The first tanks were used to break through trench def ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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