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QF 4 Inch Mk XVI Naval Gun
The QF 4 inch Mk XVI gunMk XVI = Mark 16. Britain used Roman numerals to denote marks (models) of ordnance until after World War II. Mark XVI indicates this was the sixteenth model of QF 4 inch gun. was the standard British Commonwealth naval anti-aircraft and dual-purpose gun of World War II. Service The Mk XVI superseded the earlier QF 4 inch Mk V naval gun on many Royal Navy ships during the late 1930s and early 1940s. The ammunition fired by the Mk V gun and the Mk XVI guns were different. The ammunition for the Mk V gun was long and weighed , while the ammunition fired by the Mk XVI gun was long and weighed . The weight of the high-explosive projectile grew from for the Mk V to for the Mk XVI. There were three variants of the gun produced with differing construction methods. The original Mk XVI had an A tube, jacket to from the muzzle and a removable breech ring. The Mk XVI* replaced the A tube with an autofretted loose barrel with a sealing collar at the front of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Gun
Naval artillery is artillery mounted on a warship, originally used only for naval warfare and then subsequently used for more specialized roles in surface warfare such as naval gunfire support (NGFS) and anti-aircraft warfare (AAW) engagements. The term generally refers to powder-launched projectile-firing weapons and excludes self-propelled projectiles such as torpedoes, rockets, and missiles and those simply dropped overboard such as depth charges and naval mines. Origins The idea of ship-borne artillery dates back to the classical era. Julius Caesar wrote about the Roman navy's usage of ship-borne catapults against Celtic Britons ashore in his ''Commentarii de Bello Gallico''. The dromons of the Byzantine Empire carried catapults and Greek fire. From the Middle Ages onwards, warships began to carry cannons of various calibres. In the Battle of Tangdao in 1161, the Southern Song general Li Bao used huopao (a type of gunpowder weapons, possibly cannons) and fire arrows against ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autofrettage
Autofrettage is a work-hardening process in which a pressure vessel (thick walled) is subjected to enormous pressure, causing internal portions of the part to plastic yield, yield plastically, resulting in internal compressive residual stresses once the pressure is released. The goal of autofrettage is to increase the pressure-carrying capacity of the final product. Inducing residual compressive stresses into materials can also increase their resistance to stress corrosion cracking; that is, non-mechanically assisted cracking that occurs when a material is placed in a corrosive environment in the presence of tensile stress. The technique is commonly used in manufacture of high-pressure pump cylinders, warship and gun barrels, and fuel injection systems for diesel engines. Due to work-hardening process it also enhances wear life of the barrel marginally. While autofrettage will induce some work hardening, that is not the primary mechanism of strengthening. The start point is a si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Naval Anti-aircraft Guns
Naval anti-aircraft guns include anti-aircraft guns specially designed or adapted for mounting on ships, and naval guns adapted for high-angle fire. {, class="wikitable sortable" style="font-size:98%;" ! width=13% , Caliber (mm) ! width=16% , Number of barrels ! width=35% , Weapon name ! width=18% , Country of origin ! width=18% , Period , - , 20 , 1 or 2 , Oerlikon 20 mm cannon , , World War II , - , 20 , 4 , Flakvierling 38 cannon , , World War II , - , 25 , 1, 2, or 3 , Type 96 25 mm AT/AA Gun , , World War II , - , 28 , 4 , 1.1"/75 (28mm) gun , , World War II , - , 37 , 2 , 3.7 cm SK C/30 , , World War II , - , 40 , 1, 4, or 8 , QF 2 pdr Mk II, Mk VIII Vickers 2-pounder "pom-pom" , , World War I World War II , - , 40 , 1, 2, or 4 , Bofors 40 mm gun , , World War II - Korean War - Cold War , - , 45 , 1 or 2 , 45 mm anti-aircraft gun (21-K) , , World War II , - , 76.2 , , QF 3 inch 20 cwt , , World War I , - , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V And W-class Destroyer
The V and W class was an amalgam of six similar ship class, classes of destroyer built for the Royal Navy under the 9th, 10th, 13th and 14th of fourteen War Emergency Programme destroyers, War Emergency Programmes during the First World War and generally treated as one class. For their time they were among the most powerful and advanced ships of their type in the world, and set the trend for future British designs. They arrived in time to see service in the First World War. During the interwar period these ships formed the backbone of the Royal Navy's destroyer flotillas until gradually replaced by new construction; by the mid-1930s most had been displaced to the Reserve Fleet (United Kingdom), reserve fleet. Most ships survived to make an extensive contribution to the Second World War effort, in the vital role of Escort Group (naval), convoy escort, freeing up more modern ships for fleet action. History The V and W class were the ultimate evolution of British destroyer desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAS Transvaal
SAS ''Transvaal'' was one of three s in the South African Navy (SAN). She was built as HMS ''Loch Ard'' (K602) for the Royal Navy during World War II, but was transferred to the SAN in 1944 before completion and renamed as HMSAS ''Transvaal''. The ship was completed shortly after the German surrender in May 1945 and did not participate in the war. ''Transvaal'' was assigned to ferry troops home from Egypt after the war and participated in the annexation of the Prince Edward Islands in late 1947. Together with her sister ships, the ship made port visits in Middle Africa in 1948. Three years later, she participated in the celebration of Australia's Golden Jubilee. ''Transvaal'' received a lengthy refit in the late 1950s. The ship was placed in reserve in 1964 and was sold for scrap in 1977. ''Transvaal''s remains were donated for use as an artificial reef and it was scuttled the following year. Description ''Transvaal'' displaced at standard load and at deep load. The ship ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAS Good Hope
SAS ''Good Hope'' (pennant number: F432) was one of three s in the South African Navy (SAN). It was built as HMS ''Loch Boisdale'' (K432) for the Royal Navy during World War II, but was transferred to the SAN before completion in 1944 and renamed as HMSAS ''Good Hope''. The ship was assigned to convoy escort duties in 1945, but did not encounter any enemy ships before the end of the war. It was assigned to ferry troops home from Egypt afterwards and made port visits in Middle Africa in 1948. Upon returning home, ''Good Hope'' was placed in reserve until it was converted into a training ship during the mid-1950s and served as the navy's flagship. The ship was again placed in reserve in 1965 and was sold for scrap in 1977. ''Good Hope''s remains were donated for use as an artificial reef and it was scuttled the following year. Description ''Good Hope'' displaced at standard load and at deep load. The ship had an overall length of , a beam of and a mean deep draught of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NNS Obuma
NNS ''Obuma'', formerly NNS ''Nigeria'', was a Nigerian frigate which served as the flagship of the Nigerian Navy from 1965 to 1982. It is presently a hulk stationed at the Nigerian Navy College of Engineering. Background and construction The Nigerian government ordered the frigate ''Nigeria'' as a purpose-built flagship from Wilton-Fijenoord in the Netherlands at a cost of . This was part of an expansion practice which sought to use new ships to balance out the Nigerian Navy's older acquisitions and give the force seagoing capabilities. The Dutch Ministry of Defence loaned the Nigerian Navy another ship, NNS ''Ogoja'', pending the completion of the ''Nigeria'', until it eventually decided to gift the ''Ogoja'' to the navy in October 1965. ''Nigeria'' was laid down on 9 April 1964 and launched on 12 April 1965. It began performing sea trials with an all-Nigerian crew later that year. It was designed for a complement of 216 crew. Service The ''Nigeria'' formally entered servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Whelp (R37)
HMS ''Whelp'' was one of eight W-class destroyers built for the Royal Navy during the Second World War. Completed in 1944, the ship spent most of the war assigned to the Eastern and Pacific Fleets. She screened British aircraft carriers as their aircraft attacked targets in the Japanese-occupied Nicobar Islands, the Dutch East Indies, Formosa and near Okinawa. ''Whelp'' was present at the Japanese surrender in Tokyo Bay in 1945 and later in Hong Kong. She was paid off in January 1946 and went into reserve. ''Whelp'' was sold to the South African Navy (SAN) in 1952 and renamed ''Simon van der Stel''. She was subsequently converted into a fast anti-submarine frigate in the early 1960s and served as a training ship from 1968 until 1972 when she went back into reserve. ''Simon van der Stel'' was recommissioned in 1975 for a refit, but that proved to be uneconomical and she was scrapped the following year. Description The W-class ships displaced at standard load and at dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Wessex (R78)
HMS ''Wessex'' (pennant number: R78) was one of eight W-class destroyers built for the Royal Navy during World War II. Completed in 1944, the ship spent most of the war assigned to the Eastern and Pacific Fleets. She screened British aircraft carriers as their aircraft attacked targets in the Japanese-occupied Nicobar Islands, the Dutch East Indies and Okinawa. ''Wessex'' was then reduced to reserve after arriving home in December 1945. She was then transferred to Simon's Town, South Africa in 1947, to form the South Atlantic Reserve Force. The ship was purchased by the South African Navy in 1950 and renamed HMSAS ''Jan van Riebeeck''. She was placed in reserve in 1953 and continuing shortages of manpower kept the ship in reserve for most of the rest of her career even though she was converted into a fast anti-submarine frigate in 1964–66. ''Jan van Riebeeck'' was converted to serve as a training ship in 1971–72 and remained in that role until she was decommissioned in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 16 Frigate
The Type 16 frigates were a class of British anti-submarine frigates of the Royal Navy. They were based on the hulls of World War II-era destroyers that had been rendered obsolete by rapid advances in technology. They were similar in concept to the Type 15 frigate, but were a far more limited design rendered necessary by budget constraints. History At the start of the Cold War, the Royal Navy was in urgent need of fast escort ships to counter the large number of s being built by the Soviet Union, which were faster than the Royal Navy's existing sloops and frigates. Britain had large numbers of War Emergency Programme destroyers, which while relatively new, were poorly equipped for modern fleet purposes, with poor anti-aircraft armament and fire control. It was therefore decided to convert the Emergency Programme destroyers to interim escorts to meet the Royal Navy's requirements until new-build ships (which eventually became the Type 12 and Type 14 frigates) could be designe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 15 Frigate
The Type 15 frigate was a class of British anti-submarine frigates of the Royal Navy. They were conversions based on the hulls of World War II-era destroyers built to the standard War Emergency Programme "utility" design. History By 1945 the wartime "utility" vessels were obsolescent as destroyers due to their relatively small size and makeshift armament. Future construction would be based on ever larger vessels, such as the and . Rapid advances in German U-boat technology with the Type XXI and Type XXVI rendered even some of the most modern Royal Navy escorts obsolete. This technology was being put into production by the Soviet Navy in the form of the . The Royal Navy began designing and constructing new fast anti-submarine frigates of the Type 12 and Type 14 design to counter this threat. However, it would be some time before these vessels could be brought into service and budget constraints limited the number of new hulls that could be constructed. The solution to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
