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Rheinmetall RMK30
The RMK 30 (''Rückstoßfreie Maschinenkanone 30''; recoilless autocannon) is a recoilless 30 mm caliber autocannon firing caseless 30 × 250 mm ammunition cartridges. The gun was developed by the German company Mauser, which is now a subsidiary of the Rheinmetall group. The German Bundesamt für Wehrtechnik und Beschaffung (BWB) required a new recoilless autocannon, therefore the development of the RMK 30 started in 1993. Unlike former recoilless weapons it is capable of firing salvos or in fully automatic mode without producing recoil. It is a three-chamber revolver cannon; the revolver and firing mechanism are driven by an electric motor, allowing variable rates of fire of up to 300 rounds/min. A fraction of the propellant gases is ejected to the rear of the cannon, compensating for the recoil and allowing lightweight and less rigid mounts. Though recoilless, the RMK 30 has a higher muzzle energy than conventional 30 mm autocannons. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autocannon
An autocannon, automatic cannon or machine cannon is a fully automatic gun that is capable of rapid-firing large-caliber ( or more) armour-piercing, explosive or incendiary shells, as opposed to the smaller-caliber kinetic projectiles (bullets) fired by a machine gun. Autocannons have a longer effective range and greater terminal performance than machine guns, due to the use of larger/heavier munitions (most often in the range of , but bigger calibers also exist), but are usually smaller than tank guns, howitzers, field guns or other artillery. When used on its own, the word "autocannon" typically indicates a non-rotary weapon with a single barrel. When multiple rotating barrels are involved, such a weapon is referred to as a "rotary autocannon" or occasionally "rotary cannon", for short (particularly on aircraft). Autocannons are heavy weapons that are unsuitable for use by infantry. Due to the heavy weight and recoil Recoil (often called knockback, kickback o ... [...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, as 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. In hand-held small arms, the recoil momentum will be eventually transferred to the ground, but will do so through the body of the shooter hence resulting in a noticeable impulse commonly referred to as a "kick". In heavier mounted guns, such as heavy machine guns or artillery pieces, recoil momentum is transferred to the Earth's surface through the platform on which the weapon is mounted. In order to bring the rearward moving gun to a halt, the momentum acquired by the gun is di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caseless Firearms
Caseless ammunition (CL), or rather caseless cartridge, is a configuration of weapon-cartridge that eliminates the cartridge case that typically holds the primer, propellant and projectile together as a unit. Instead, the propellant and primer are fitted to the projectile in another way so that a cartridge case is not needed, for example inside or outside the projectile depending on configuration. Caseless ammunition is an attempt to reduce the weight and cost of ammunition by dispensing with the case, which is typically precision made of brass or steel, as well as to simplify the operation of repeating guns by eliminating the need to extract and eject the empty case after firing. Its acceptance has been hampered by problems with production expenses, heat sensitivity, sealing, and fragility. Its use to date has been mainly limited to prototypes and low-powered guns, with some exceptions. Internal propellant caseless ammunition Description Older caseless ammunition typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Guns
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. The human activity that surrounds aircraft is called ''aviation''. The science of aviation, including designing and building aircraft, is called ''aeronautics.'' Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ball ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
30 Mm Artillery
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muraena Gun
''Muraena'' is a genus of twelve species of large eels in the family Muraenidae. This genus is common in the Mediterranean, and is abundantly represented in tropical and subtropical seas, especially in rocky parts or on coral reefs. In the majority, a long fin runs from the head along the back, round the tail to the vent, but all are destitute of pectoral and ventral fins. The skin is scaleless and smooth, in many species ornamented with varied and bright colours. The mouth is wide, the jaws strong and armed with formidable, generally sharply pointed, teeth, which enable the ''Muraena'' not only to seize its prey (which chiefly consists of other fishes) but also to inflict serious, and sometimes dangerous, wounds on its enemies. It attacks persons who approach its places of concealment in shallow water, and is feared by fishermen. At least one species, ''Muraena retifera'', possesses an additional "raptorial pharyngeal jaw" within the pharynx, which is mobile and can be thrust fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and Autonomous underwater vehicle, robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as ''boats'' rather than ''ships'' irrespective of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and they were adopted by several navies. They were first widely used during World War I (1914–1918), and are now used in many navy, navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, Blockade runner, blockade running, Ballistic missile submarine, nuclear deterrence, reconnaissance, conventio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 212 Submarine
The German Type 212 class (German: U-Boot-Klasse 212 A), also Italian ''Todaro'' class, is a diesel-electric submarine developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German and Italian navies. It features diesel propulsion and an additional air-independent propulsion (AIP) system using Siemens proton exchange membrane (PEM) compressed hydrogen fuel cells. The submarines can operate at high speed on diesel power or switch to the AIP system for silent slow cruising, staying submerged for up to three weeks with little exhaust heat. The system is also said to be vibration-free, extremely quiet and virtually undetectable. Type 212 is the first fuel cell propulsion system equipped submarine series. Development At the beginning of the 1990s the German Navy was seeking a replacement for the Type 206 submarines. Initial study started on a Type 209 improved design, with AIP capability, called Type 212. The final programme started in 1994 as the two navies of Germany and I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wiesel AWC
The Wiesel Armoured Weapons Carrier (AWC) is a German light air-transportable armoured fighting vehicle, more specifically a lightly armoured weapons carrier, produced by Rheinmetall. It is quite similar to historical scouting tankettes in size, form and function, and is the only true modern tankette in use in Western Europe. The Wiesel has been used in several of the Bundeswehr's missions abroad (UNOSOM II, IFOR, SFOR, KFOR, TFH, ISAF). History The Wiesel was developed for the German Army to meet a requirement for an air-transportable light armored vehicle for use by its airborne troops, as the infantry of the German Bundeswehr, especially airborne infantry, were considered unprepared to successfully fight enemy main battle tanks (MBT) in the 1970s. The requirements were that the vehicle should fit in common NATO transport planes and could eventually be air-dropped. It should be able to fight infantry as well as enemy tanks or aircraft. Porsche produced some prototypes of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GIAT 30
The GIAT 30 is a series of 30 mm cannon developed to replace the DEFA 550 series weapons on French military aircraft. Introduced in the late 1980s, the GIAT 30 is a revolver cannon with electric ignition and automatic recocking. Unlike the DEFA cannon, the revolver chamber is electrically operated, rather than gas operated, improving both reliability and rate of fire. Two versions of the GIAT 30 are offered. GIAT 30M 781 Primarily intended for helicopter use and offered in several fixed, podded, and turreted installations. It is long with a total system weight of . It is designed to fire the ADEN/DEFA 30x113mm B rounds. The weight of the projectile varies from for HEI to for APHEI-SD. Typical muzzle velocity is with a rate of fire of 750 rounds per minute. Given its considerable recoil, it is typically used for single shots or controlled bursts rather than continuous fire. The 30 M781 is used on the Eurocopter Tiger and is also offered for naval use as part of the NARWHAL ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Army
The German Army (, "army") is the land component of the armed forces of Germany. The present-day German Army was founded in 1955 as part of the newly formed West German ''Bundeswehr'' together with the ''Marine'' (German Navy) and the ''Luftwaffe'' (German Air Force). , the German Army had a strength of 62,766 soldiers. History Overview A German army equipped, organized, and trained following a single doctrine and permanently unified under one command in 1871 during the unification of Germany under the leadership of Prussia. From 1871 to 1919, the title '' Deutsches Heer'' (German Army) was the official name of the German land forces. Following the German defeat in World War I and the end of the German Empire, the main army was dissolved. From 1921 to 1935 the name of the German land forces was the ''Reichsheer'' (Army of the Empire) and from 1935 to 1945 the name '' Heer'' was used. The ''Heer'' was one of two ground forces of the Third Reich during World War II but, unlike t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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