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5 inch 50 caliber gun USS CHATTANOOGA C-16
Chattanooga, 5"/50 caliber deck gun, probably port side forward.
Type *Naval gun
Place of origin Flag of the United States.svg United States
Service history
In service 1904
Used by United States Navy
Wars *World War I
Production history
Designer Bureau of Ordnance
Designed 1900
Manufacturer U.S. Naval Gun Factory
Number built * Mark 5: 87 (Nos. 200–286)
  • Mark 6: 64 (Nos. 293–356)
Variants Mark 5 Mods 0–3, Mark 6 Mods 0–2
Specifications
Weight * Mark 5: 10,294 lb (4,669 kg) (with breech)
  • Mark 6: 10,550 lb (4,790 kg) (with breech)
Length Marks 5 and 6: 255.65 in (6.494 m)
Barrel length Marks 5 and 6: 250 in (6.4 m) bore (50 calibers)

Shell * Mark 5: 60 lb (27 kg) armor-piercing
  • Mark 6: 50 lb (23 kg) armor-piercing
Caliber 5 inches (127 mm)
Elevation * Mark 9: −10° to +15°
  • Mark 12: −10° to +25°
Traverse −150° to +150°
Rate of fire 6–8 rounds per minute
Muzzle velocity * 50lb:3,000 ft/s (910 m/s)
  • 60lb:2,700 ft/s (820 m/s)
Maximum range 19,000-yard (17,374 m) at 25.3° elevation

The 5"/50 caliber gun (spoken "five-inch-fifty-caliber") was the first long barrel 5-inch gun of the United States Navy and was used in the secondary batteries of the early Delaware-class dreadnought battleships, protected cruisers, and scout cruisers and refit the armored cruiser New York, and the New Orleans-class protected cruisers. They would go on to be used on cargo ships, store ships and unclassified auxiliaries during World War II as well as in emergency coastal defense batteries.[1]

DesignEdit

The Mark 5, Nos. 200 – 286, was a 50 caliber naval gun of a simplified construction by combining the breech piece along with the chase hoop into one long tube that was shrunk on from the muzzle. Mod 1 was a Mod 0 gun that was relined with a conical nickel-steel liner and an additional gun-steel chase hoop that extended to the muzzle that was secured by a nickel-steel locking ring. Mod 2, gun No. 280, had a slightly different liner with Mod 3, gun No. 245, was a Mod 0 gun with its gun-steel tube replaced with a nickel-steel tube with a gun-steel chase hoop added that extended all the way to the muzzle. The Mod 3 gun had a longer chase hoop and shorter jacket compare to Mods 1 and 2.[1][2]

The Mark 6, gun Nos. 293–356, was the bag-ammunition equivalent to the Mark 5 gun. Mod 0, Nos. 323-356, had a single jacket constructed of nickel-steel, that replaced the jacket, chase hoop and locking ring of the Mark 5. Mod 1, Nos. 293–306 and 308, was built of gun-steel with a chamber of a different design with some external differences to fit it onto differnet mountings. The Mod 2, Nos. 307 and 309–322, had the same chamber as the Mod 0 but was otherwise almost identical to the Mod 1.[1][2]

Naval ServiceEdit

Ship Gun Installed Gun Mount
USS Delaware (BB-28) Mark 6 Mod 0: 14 × 5"/40 caliber (Nos. 343–356) Mark 9 and 12
USS North Dakota (BB-29) Mark 6 Mod 0: 14 × 5"/40 caliber (Nos. 329–342) Mark 9 and 12
USS New York (ACR-2) Mark 6 Mod 1: 10 × 5"/40 caliber (Nos. 295–304) (1907 refit) Unknown
USS Denver (C-14) Mark 5: 10 × 5"/40 caliber Unknown
USS Des Moines (C-15) Mark 5: 10 × 5"/40 caliber Unknown
USS Chattanooga (C-16) Mark 5: 10 × 5"/40 caliber Unknown
USS Galveston (C-17) Mark 5: 10 × 5"/40 caliber Unknown
USS Tacoma (C-18) Mark 5: 10 × 5"/40 caliber Unknown
USS Cleveland (C-19) Mark 5: 10 × 5"/40 caliber Unknown
USS Chester (CS-1) Mark 6 Mod 0: 2 × 5"/40 caliber (Nos. 323–324) Unknown
USS Birmingham (CS-2) Mark 6 Mod 0: 2 × 5"/40 caliber (Nos. 325–326) Unknown
USS Salem (CS-3) Mark 6 Mod 0: 2 × 5"/40 caliber (Nos. 327–328) Unknown
USS New Orleans (CL-22) Mark 5: 10 × 5"/40 caliber (1904 and 1907 refits) Unknown
USS Albany (CL-23) Mark 5: 10 × 5"/40 caliber (1904 and 1907 refits) Unknown

The 5"/50 caliber gun was used on cargo ships, store ships and unclassified auxiliaries during World War II.[1]

ReferencesEdit

External linksEdit

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