|
|
|
HOME
|
US Navy -
ships
|
US Navy - air
units
|
USMC - air
units
|
International
Navies
|
Weapon Systems
|
Special Reports |
|
Surface Vessel Weapon System Mk-42 gun (5"/54-caliber / 127mm) |
 Mk-42 gun aboard JDS Shirane (DDH 143) |
|
The Mark 42 5"/54 caliber gun (127mm) is a naval gun (naval
artillery) mount used by the United States Navy and other countries.
It consisted of the Mark 18 gun and Mark 42 gun mount. United States
naval gun terminology indicates the gun fires a projectile 5 inches
(127.0 mm) in diameter, and the barrel is 54 calibers long (barrel
length is 5" × 54 = 270" or 6.9 meters.) In the 1950s a gun with
more range and a faster rate of fire than the 5"/38 caliber gun used
in WWII was needed. Because of this reason, the gun was created
concurrently with the 3"/70 Mark 26 gun for different usages. The
5"/54 Mk-42 is an automatic, dual-purpose (air / surface target) gun
mount. It is usually controlled remotely from the Mk 68 Gun Fire
Control System, or locally from the mount at the One Man Control
(OMC) station. The self-loading gun mount weighs about 60.4 long tons (61.4 t) including two drums under the mount holding 40 rounds of semi-fixed case type ammunition. The gun fires 31.75 kg (70.0 lb) projectiles at a velocity of 2,650 ft/s (807.7 m/s). Maximum rate of fire is 40 rounds per minute. Magazine capacity is 599 rounds per mount. The Mark 42 mount originally was equipped for two on-mount gunners, one surface and one antiaircraft, but the antiaircraft gunner position was scrapped later on when the increasing speed of naval aircraft made manual aiming of antiaircraft weapons impractical. The Mark 45 lightweight (22.1 long tons (22.5 t)) gun mount began replacing the Mk 42 mount in 1971 for easier maintenance and improved reliability in new naval construction for the United States Navy. Manufacturer: FMC Corporation (later United Defense / now a part of BAE Systems) Technical data: Caliber: 5 inch (127 mm) Barrel lenght: 270 inch (6,86 meters) Shell: 70 lb (31,75 kg) Elevation: - 15° to + 85° Rate of fire: designed: 40 rpm / downrated to 28 rpm in 1968 Range: 12,8 nmi (23,70 km) at +45° elevation / 8,5 nmi (15,7 km) at +85° elevation Used on: US Navy: First used on USS Northampton (CLC 1) Forrestal class CV Belknap class CG USS Truxtun (CGN 35) Forrest Sherman class DD Mitscher class DD Charles F. Adams class DDG Farragut class DDG Knox class FF and ships of the following Navies: Australia, Egypt, Germany, Greece, Japan, Mexico, Spain, Taiwan, Thailand, Turkey |
|
images |
 Mk-42 (5"/54-caliber - 127mm) naval gun aboard USS Capodanno (FF 1093)  Mk-42 (5"/54-caliber) naval gun aboard USS Goldsborough (DDG 20)  Mk-42 gun aboard a JMSDF Hatakaze class Guided Missile Destroyer DDG  Mk-42 (5"/54-caliber - 127mm) naval gun aboard USS Badger (FF 1071)  Mk-42 (5"/54-caliber) naval gun aboard USS King (DDG 41)  Mk-42 (5"/54-caliber) naval gun aboard a Charles F. Adams class DDG  Mk-42 (5"/54-caliber) naval gun aboard a Charles F. Adams class DDG  Mk-42 (5"/54-caliber) naval gun and Mk-13 missile launcher aboard USS Semmes (DDG 18)  Mk-42 (5"/54-caliber) naval gun aboard a Charles F. Adams class DDG  Mk-42 (5"/54-caliber) naval gun aboard a Belknap class CG  Mk-42 (5"/54-caliber) naval guns aboard JDS Haruna (DDH 141)  Mk-42 gun aboard a JMSDF Hatakaze class Guided Missile Destroyer DDG  Mk-42 gun aboard a JMSDF Hatakaze class Guided Missile Destroyer DDG  Mk-42 gun aboard a JMSDF Hatakaze class Guided Missile Destroyer DDG  Mk-42 (5"/54-caliber) naval guns aboard JDS Hiei (DDH 142)  Mk-42 (5"/54-caliber) naval guns aboard JDS Haruna (DDH 141)  Mk-42 (5"/54-caliber) naval guns aboard JDS Haruna (DDH 141)  Mk-42 guns aboard a JMSDF Shirane class Helicopter Destroyer / DDH  Mk-42 guns aboard a JMSDF Shirane class Helicopter Destroyer / DDH  Mk-42 guns aboard a JMSDF Shirane class Helicopter Destroyer / DDH  Mk-42 guns aboard a JMSDF Shirane class Helicopter Destroyer / DDH  Mk-42 (5"/54-caliber) naval gun aboard USS William V. Pratt (DDG 44)  Mk-42 (5"/54-caliber) naval gun aboard USS Capodanno (FF 1093)  Mk-42 (5"/54-caliber) naval gun aboard a Knox class Frigate  Mk-42 (5"/54-caliber) naval gun aboard USS Fox (CG 33)  Mk-42 (5"/54-caliber) gun on a test platform  Mk-42 (5"/54-caliber) gun on a test platform  Mk-42 (5"/54-caliber) gun on a test platform  Mk-42 (5"/54-caliber) gun during maintenance  Mk-42 (5"/54-caliber) gun during maintenance  Mk-42 (5"/54-caliber) gun housing |
|
|
seaforces.org
|
Weapon Systems
start page
| |
