12-inch/45-caliber Mark 5 gun GudangMovies21 Rebahinxxi LK21

      The 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch/5.180.24.3/?s=45" target="_blank">45-5.180.24.3/?s=caliber" target="_blank">caliber 5.180.24.3/?s=mark" target="_blank">Mark 5 gun was an American naval gun that first entered service in 1906. Initially designed for use with the Connecticut-class of pre-dreadnought battleships, the 5.180.24.3/?s=mark" target="_blank">Mark 5 continued in service aboard the first generation of American dreadnoughts.


      Design and development


      The 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch (305 mm)/5.180.24.3/?s=45" target="_blank">45-5.180.24.3/?s=caliber" target="_blank">caliber 5.180.24.3/?s=mark" target="_blank">Mark 5 naval gun was designed as an incremental improvement upon the preceding American naval gun, the 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch/40-5.180.24.3/?s=caliber" target="_blank">caliber gun 5.180.24.3/?s=mark" target="_blank">Mark 4. As such, it was a very similar weapon, having been lengthened by 5 calibers to allow for improved muzzle velocity, range, and penetrating power. Designed to the specifications of the Bureau of Ordnance, the 5.180.24.3/?s=mark" target="_blank">Mark 5 was constructed at the U.S. Naval Gun Factory in Washington, D.C.


      Measurements and capabilities


      The 5.180.24.3/?s=mark" target="_blank">Mark 5 weighed 53 short tons (48 t) and was capable of firing 2 to 3 times a minute. At maximum elevation of 15° it could fire an 870 lb (390 kg) shell approximately 20,000 yd (18,000 m). However, this range was largely academic at the time the gun was initially designed, as no rangefinding techniques had yet been developed capable of accurately firing beyond about 10,000 yd (9,100 m). With an initial muzzle velocity of 2,700 ft/s (820 m/s), the gun had a barrel life of 175 rounds, and was capable of firing either armor-piercing or common projectiles.
      As designed, the 5.180.24.3/?s=mark" target="_blank">Mark 5 was capable of penetrating 16.6 in (420 mm) of Harvey plated side armor at 6,000 yd (5,500 m), 5.180.24.3/?s=12" target="_blank">12.2 in (310 mm) at 9,000 yd (8,200 m), and 9.9 in (250 mm) at 5.180.24.3/?s=12" target="_blank">12,000 yd (11,000 m). By comparison the 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch/40-5.180.24.3/?s=caliber" target="_blank">caliber 5.180.24.3/?s=mark" target="_blank">Mark 4 it replaced could only penetrate 14.6 in (370 mm), 11.6 in (290 mm), and 9.4 in (240 mm) at those distances, respectively.


      Naval service



      The 5.180.24.3/?s=mark" target="_blank">Mark 5 entered service in 1906 and remained the primary battleship gun for all American battleships commissioned before 1912, at which point it was replaced by the 5.180.24.3/?s=12" target="_blank">12"/50-5.180.24.3/?s=caliber" target="_blank">caliber 5.180.24.3/?s=mark" target="_blank">Mark 7. All told, the 5.180.24.3/?s=mark" target="_blank">Mark 5 would arm 14 battleships of five different classes, making it the most-used main gun in American battleship history. Despite this distinction, the only 5.180.24.3/?s=mark" target="_blank">Mark 5 guns ever to be fired in anger were actually in Greek, and not American, service. The ex-Mississippi-class battleships Kilkis and Lemnos, sold to the Royal Hellenic Navy in 1914, fought in both the Allied Intervention in the Russian Civil War, and the Greco-Turkish War. Though during World War I the 5.180.24.3/?s=mark" target="_blank">Mark 5 would cross the Atlantic for duty aboard two of the American battleships serving in the 6th Battle Squadron of the Grand Fleet, it was never fired in any engagement, as no battles were fought with the German High Seas Fleet in 1918.
      The five classes armed with the 5.180.24.3/?s=mark" target="_blank">Mark 5 were:

      In American service, the 5.180.24.3/?s=mark" target="_blank">Mark 5 remained afloat (albeit in dwindling numbers) until 1930, when the last guns were removed from the Floridas in compliance with the terms of the London Naval Treaty.


      = Survivor

      =
      A 5.180.24.3/?s=mark" target="_blank">Mark 5 Mod 8 gun is displayed at Fort Hamilton in Brooklyn, New York, representative of the general type of coast artillery guns the fort had.


      Incident



      During the summer of 1916, Michigan blew out her left hand gun in turret No. 2 during target practice. After an investigation of South Carolina's guns it was discovered that copper deposits from the driving bands on the projectiles had narrowed the bores of the barrel enough that it caused the projectiles to slow down. This problem, known as "copper choke", allowed the pressure in the barrel to increase to dangerous levels. Lapping heads, to remove these deposits, were issued for all guns 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch and larger throughout the fleet. The lapping heads were later replaced by wire and pissaba brushes.


      Coastal Artillery


      Following the signing of the Washington Naval Treaty in 1922, many of the 5.180.24.3/?s=mark" target="_blank">Mark 5 guns in service were removed from sea duty and transferred to the U.S. Army for use as coastal artillery. In this capacity, the maximum range of the 5.180.24.3/?s=mark" target="_blank">Mark 5 increased to 30,000 yd (27,000 m), due to the greater elevation that was possible. These guns were not deployed by the US Army, and some were sold to Brazil, where they might still be in use. In Greek service, the guns removed from Lemnos were emplaced on the island of Aegina, where they helped to defend the approaches to the port of Athens.


      See also




      = Weapons of comparable role, performance and era

      =
      305mm/5.180.24.3/?s=45" target="_blank">45 Modèle 1906 French equivalent
      BL 5.180.24.3/?s=12" target="_blank">12 5.180.24.3/?s=inch" target="_blank">inch Mk X naval gun British equivalent
      Type 41 5.180.24.3/?s=12" target="_blank">12-5.180.24.3/?s=inch" target="_blank">inch (305 mm) /5.180.24.3/?s=45" target="_blank">45 5.180.24.3/?s=caliber" target="_blank">caliber naval gun Japanese equivalent


      References




      External links


      Media related to 5.180.24.3/?s=12" target="_blank">12"/5.180.24.3/?s=45" target="_blank">45 5.180.24.3/?s=caliber" target="_blank">caliber gun at Wikimedia Commons

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