• Thumbnail for Unrotated Projectile
    The Unrotated Projectile (UP) was a British anti-aircraft and ground-bombardment rocket of the Second World War. The original 7-inch version was developed...
    35 KB (4,722 words) - 20:20, 3 November 2024
  • Thumbnail for HMS Vanguard (23)
    7 mm) in compensation. A small conning tower was added aft, and four Unrotated Projectile mounts were added to supplement the six octuple-barrel 2-pounder...
    43 KB (5,571 words) - 18:32, 9 September 2024
  • precision Unified Process, a software development process framework Unrotated projectile, an anti-aircraft weapon UP (complexity) Up (game theory) Up quark...
    5 KB (650 words) - 03:26, 25 October 2024
  • Thumbnail for Hedgehog (weapon)
    destroyers and corvettes to supplement the depth charges. As the mortar projectiles employed contact fuzes rather than time or bathymetric (depth) fuzes...
    20 KB (2,304 words) - 12:14, 15 November 2024
  • Thumbnail for HMS Hood
    with two more mountings added in 1937. To these were added five unrotated projectile (UP) launchers in 1940, each launcher carrying 20 seven-inch (178 mm)...
    80 KB (10,148 words) - 18:55, 25 November 2024
  • Thumbnail for RP-3
    cordite-powered surface-to-air rockets. Several models of these Unrotated Projectile (UPs) were introduced, starting with a 7 inches (180 mm) diameter...
    45 KB (5,264 words) - 19:01, 11 October 2024
  • Sea Ceptor Sea Dart – retired Seaslug – retired Sea Viper Sea Wolf Unrotated projectile - retired Fuze Keeping Clock Gyro rate unit HACS Hazemeyer gun mount...
    8 KB (899 words) - 15:57, 23 November 2024
  • Thumbnail for Cordite
    before World War II, and as 2-and-3-inch-diameter (51 and 76 mm) Unrotated Projectiles for launching anti-aircraft weapons. Small cordite rocket charges...
    29 KB (3,484 words) - 00:48, 22 November 2024
  • Thumbnail for Rocket launcher
    rockets were initially used in the anti-aircraft role; the 7-inch Unrotated Projectile was fired from single pedestal-mounted launchers on warships and...
    10 KB (1,092 words) - 14:43, 5 October 2024
  • (missile family) Starburst surface-to-air missile Holman Projector Unrotated Projectile Z battery (2 inch rocket battery) AIM-9X Sidewinder RIM-2 Terrier...
    13 KB (1,385 words) - 07:33, 10 November 2024
  • Thumbnail for German battleship Bismarck
    a high-explosive 20.3 cm (8.0 in) shell; the explosion detonated unrotated projectile ammunition and started a large fire, which was quickly extinguished...
    86 KB (11,514 words) - 20:13, 23 November 2024
  • Thumbnail for Oerlikon 20 mm cannon
    550 to 600 m/s with a rate of fire of 520 rpm. The FFL of 30 kg fired a projectile at a muzzle velocity of 675 m/s with a rate of fire of 500 rpm. And the...
    27 KB (3,239 words) - 08:03, 23 October 2024
  • Thumbnail for Arethusa-class cruiser (1934)
    accommodation in lieu for service as commodore. Aurora received an unrotated projectile (UP) mounting and eight QF 2-pounder Mark VIII in two quadruple mountings...
    13 KB (1,151 words) - 21:56, 23 January 2024
  • Thumbnail for HMS Nelson (28)
    Nelson in the Firth of Forth, September 1940; the Unrotated Projectile mounts are visible on the roofs of two of her main-gun turrets...
    37 KB (4,722 words) - 14:20, 13 November 2024
  • Thumbnail for Squid (weapon)
    to scatter the projectiles. The barrels were mounted in a frame that could be rotated through 90 degrees for loading. The projectiles weighed 390 pounds...
    7 KB (702 words) - 10:46, 11 July 2024
  • through Destroyers-for-bases deal 3-inch/23-calibre Holman Projector Unrotated Projectile 18-inch torpedoes Mk VIII-XVII 21-inch torpedo Mk II-XI 24.5-inch...
    13 KB (1,076 words) - 22:16, 30 September 2024
  • Thumbnail for Proximity fuze
    Proximity fuze (category Explosive projectiles)
    range, Doppler radar. British tests were then carried out with "unrotated projectiles" (the contemporary British term for unguided rockets). However,...
    50 KB (6,189 words) - 11:53, 16 November 2024
  • inch AA gun QF 4.5-inch Mark I to Mark V QF 5.25-inch gun Z Battery Unrotated Projectile, including "fast aerial mine" Holman Projector SBML 2-inch Mortar...
    21 KB (2,059 words) - 21:53, 8 September 2024
  • Thumbnail for HMS King George V (41)
    two Mark VI pom-pom mounts. In 1940, to combat air attack, four Unrotated Projectile mountings were fitted, on "B" turret, two on "Y" turret, one replaced...
    34 KB (3,994 words) - 22:13, 5 November 2024
  • Thumbnail for AA mine discharger
    Bulletin, March 1945) HyperWar: Handbook on Japanese Military Forces Unrotated projectile a British rocket launched parachute aerial mine system for ship defence...
    2 KB (229 words) - 13:32, 2 July 2024
  • ready-use ammunition for the anti-aircraft guns and rockets of the Unrotated Projectile mounts. Right before 06:00, while Hood was turning 20° to port to...
    38 KB (5,452 words) - 08:48, 11 September 2024
  • Thumbnail for Holman Projector
    throwing device AA Mine Discharger, a Japanese anti-aircraft mortar. Unrotated Projectile, another Royal Navy anti-aircraft weapon. Steam cannon, other steam-powered...
    11 KB (1,384 words) - 13:01, 3 November 2024
  • Thumbnail for King George V-class battleship (1939)
    replaced by two Mark VI pom-poms. In 1940, to combat air attack, four Unrotated Projectile (rocket) mountings were fitted, one on "B" turret, two on "Y" turret...
    74 KB (10,128 words) - 17:14, 17 November 2024
  • Thumbnail for Artillery
    seems only to have been used with British anti-aircraft artillery 'unrotated projectiles' (rockets) in World War II. Radar proximity fuzes were a big improvement...
    124 KB (16,146 words) - 01:02, 5 November 2024
  • Thumbnail for German cruiser Prinz Eugen
    Eugen scored a hit with a high-explosive 20.3 cm shell, detonating unrotated projectile ammunition and starting a large fire on Hood, which was quickly extinguished...
    53 KB (6,408 words) - 13:46, 23 October 2024
  • instead of conventional guns or mortars. Note that the "Calibre" of rocket projectiles may not refer to the warhead diameter but to the launch tube diameter...
    10 KB (83 words) - 11:30, 23 October 2024
  • Thumbnail for BL 15-inch Mk I naval gun
    yards (27,370 m) at 2,638 ft/s (804 m/s) using the Mk XVIIB or Mk XXII projectile, while HMS Vanguard could theoretically range to 37,870 yards (34,630 m)...
    14 KB (1,438 words) - 15:20, 27 October 2024
  • Thumbnail for Z Battery
    Z Batteries was known as the UP-3 (Unrotated Projectile) and had been developed in the late 1930s by the Projectile Development Establishment at Fort Halstead...
    8 KB (1,010 words) - 10:15, 17 January 2024
  • Thumbnail for BL 6-inch Mk XXIII naval gun
    charges of cordite or flashless (NQFP) powder for a 51 kg (112-pound) projectile. Useful life of a barrel was 1,100 effective full charges (EFC) with standard...
    8 KB (726 words) - 13:44, 23 May 2024
  • replace the Bofors, because the "VT" proximity fuse would not fit a 40mm projectile, and the 40 mm weapon was considered inadequate against the emerging anti-ship...
    66 KB (7,768 words) - 14:37, 23 November 2024