|
MK18 Mod 2 Kingfish Underwater Unmanned Vehicle
Mark XVIII or Mark 18 often refers to the 18th version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk." Mark XVIII or Mark 18 can specifically refer to: In technology In military and weaponry * De Havilland Mosquito NF Mk XVIII; a Royal Air Force night fighter radar modification * De Havilland Mosquito FB Mk XVIII, also called ''Tsetse''; RAF ground-attack aircraft carrying a QF 6 pounder (57 mm) anti-tank gun * Supermarine Spitfire Mk 18; a further development of the Mk XIV, arriving too late to serve in World War II *Mark 18 torpedo, 1944 US Navy electric torpedo *Mark 18 nuclear bomb; 1953 American nuclear bomb *CQBR The Close Quarter Battle Receiver (CQBR) is a replacement Receiver (firearms), upper receiver for the M4 carbine, M4A1 Carbine, developed by the US Navy. The CQBR features a 10.3 in (262 mm) length Gun barrel, barrel (similar to the CAR-15 ... Mark 18 Mod 0; a modification of the M4 Carbine * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Mosquito
The de Havilland DH.98 Mosquito is a British twin-engined, shoulder-winged, multirole combat aircraft, introduced during the Second World War. Unusual in that its frame was constructed mostly of wood, it was nicknamed the "Wooden Wonder", or "Mossie". Lord Beaverbrook, Minister of Aircraft Production, nicknamed it "Freeman's Folly", alluding to Air Chief Marshal Sir Wilfrid Freeman, who defended Geoffrey de Havilland and his design concept against orders to scrap the project. In 1941, it was one of the fastest operational aircraft in the world.Bowman 2005, p. 21. Originally conceived as an unarmed fast bomber, the Mosquito's use evolved during the war into many roles, including low- to medium-altitude daytime tactical bomber, high-altitude night bomber, pathfinder, day or night fighter, fighter-bomber, intruder, maritime strike, and photo-reconnaissance aircraft. It was also used by the British Overseas Airways Corporation as a fast transport to carry small, high-value c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supermarine Spitfire Variants Part Two
The British Supermarine Spitfire was facing several challenges by mid-1942. The debut of the formidable Focke-Wulf Fw 190 in late 1941 had caused problems for RAF fighter squadrons flying the latest Spitfire Mk Vb. Rolls-Royce engineers were already working on a new version of the Merlin incorporating a two-stage supercharger; the combination of the improved Merlin and the Spitfire Mk Vc airframe in a "stop-gap" design allowed the RAF to combat the Fw 190 on equal terms. In a second stream of development Supermarine was working on an improved, reinforced, Spitfire airframe which incorporated several new features and was designed for the Merlin 60 and 70 series engines. This new airframe later formed the basis for the Rolls-Royce Griffon powered Spitfires. This article presents a history of the Spitfire powered by two-stage engine variants and also describes some of the "drawing board" projects and experimental Spitfires. The Griffon powered variants are described in a separat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark 18 Torpedo
The Mark 18 torpedo was an electric torpedo used by the United States Navy during World War II. The Mark 18 was the first electric storage battery torpedo manufactured for the US Navy and it was designed primarily for use as a submarine-launched torpedo. Development The Mark 18 was built in competition with the Bureau of Ordnance electric torpedoes, which had been in development at the Naval Torpedo Station (NTS), Newport, Rhode Island, since the 1920s,, p. 280 in particular the Mark 20, originated in 1941 in collaboration with General Electric and Electric Storage Battery Company. In 1942, several German G7e electric torpedoes ran ashore, leading CNO, Admiral Ernest J. King, to urge BuOrd to build an electric torpedo for the U.S. Navy's own submarines. BuOrd told NTS to get the Mark 20 in shape, or drop it in favor of a copy, with the primary emphasis being speed of introduction. "Newport, typically, preferred its own finely machined project", but neither General E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark 18 Nuclear Bomb
The Mark 18 nuclear bomb, also known as the SOB or Super Oralloy Bomb, was an American nuclear bomb design which was the highest yield fission bomb produced by the US. The Mark 18 had a design yield of 500 kilotons. Noted nuclear weapon designer Ted Taylor was the lead designer for the Mark 18. The Mark 18 was tested once, in the Ivy King nuclear test at the Enewetak atoll in the Pacific Ocean. The test was a complete success at full yield. Description The Mark 18 bomb design used an advanced 92-point implosion system, derived from the Mark 13 nuclear bomb and its ancestors the Mark 6 nuclear bomb, Mark 4 nuclear bomb, and Fat Man Mark 3 nuclear bomb of World War II. Its normal mixed uranium/plutonium fissile core ("pit") was replaced with over 60 kg of pure highly enriched uranium or HEU. With a natural uranium tamper layer, the bomb had over four critical masses of fissile material in the core, and was unsafe: the accidental detonation of even one of the detonato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Close Quarters Battle Receiver
The Close Quarter Battle Receiver (CQBR) is a replacement upper receiver for the M4A1 Carbine, developed by the US Navy. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces. The overall length of the upper receiver is 19.25 inches (489 mm). With the stock retracted, the overall length of the weapon is 26.75 inches (679.4 mm). Those created as complete rifles (rather than only upper receivers) are type designated as MK 18 MOD 0/1. Special forces units utilize the CQBR for scenarios such as VIP protection, urban warfare, and other close quarters battle (CQB) situations. Its former preliminary National Stock Number (NSN) had been 1005-LL-L99-5996. A complete CQBR-equipped carbine now has the NSN 1005-01-527-2288. Background The M4 carbine and M16 are not ide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mk 18 Mod 0 Grenade Launcher
A Mk 18 grenade launcher in use on a M2 Browning machine guns) ">M2_Browning.html" ;"title="Patrol Craft Fast (on top of the dual .50 M2 Browning">M2 Browning machine guns) The Mk 18 Mod 0 was a 40x46mm grenade launcher used by the United States Navy during the Vietnam War and also the last known Crank (mechanism), hand crank operated firearm since the Gatling gun. It was replaced by the Mk 19 grenade launcher in service with the United States Armed Forces. Design This weapon is a manually-operated, belt-fed. The use of a split breech mechanism allowed the weapon to be light and simple. Employment The Mark 18 was used primarily on small boats or in fixed positions such as bunkers; their primary users were the so-called "river rats" and the SEALs. They could be mounted on M2HB, M60, M1919 tripods, or pintle mounts, but could not be fired without such a mount. Armored Troop Carrier (LCM)s of the Mobile Riverine Force usually mounted two Mk 18s. left, A Mk 18 grenade launcher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> De Havilland Mosquito")
