3-inch/23-caliber gun

3"/23 caliber gun
A 3"/23-caliber gun being fired aboard the United States Navy submarine chaser USS SC-291 sometime between 1918 and 1920.
Type
  • Naval gun
  • Anti-aircraft gun
  • Place of originUnited States
    Service history
    In service1913—1946
    Used byUS Navy
    WarsWorld War I
    World War II
    Production history
    Manufacturer
    VariantsMark 9, 13, and 14
    Specifications
    Mass
    • Mark 9: 749 pounds (340 kg) (with breech)
    • Mark 13: 531 pounds (241 kg)
    • Mark 14 Mod 0: 593 pounds (269 kg) (with breech)
    • Mark 14 Mod 1: 658 pounds (298 kg) (with breech)
    Length
    • Mark 9: 77.05 inches (1.957 m)
    • Mark 14: 79 inches (2.0 m)
    Barrel length
    • Mark 9: 69 inches (1.8 m) bore (23 calibres)
    • Mark 14: 71 inches (1.8 m) bore (23.5 calibres)

    Shell16.5 lb (7.5 kg) 76.2x234 mm R
    Caliber3-inch (76 mm)
    Elevation-15° to +65° or +75°
    Traverse365°
    Rate of fire8 – 9 rounds per minute
    Muzzle velocity1,650 feet per second (500 m/s)
    Effective firing range
    • 8,800 yards (8,000 m) at 45.3° elevation (WW I)
    • 10,100 yards (9,200 m) at 45° elevation (WW II)
    • 18,000 feet (5,500 m) at 75° elevation (AA)

    The 3-inch/23-caliber gun (spoken "three-inch-twenty-three-caliber") was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm) in diameter, and the barrel was 23 calibers long (barrel length is 3" × 23 = 69" or 1.75 meters.)[1]

    1. ^ Fairfield 1921 p.156