RML 11-inch 25-ton gun

Ordnance RML 11-inch 25-ton gun
Disappearing gun on HMS Temeraire in firing position
TypeNaval gun
Coast defence gun
Service history
In service1867–1903
Used byRoyal Navy
WarsBombardment of Alexandria
Production history
ManufacturerRoyal Arsenal
Unit cost£1,589 (18751)[1]
VariantsMk I, Mk II
Specifications
Mass25 long tons (25,000 kg)
Barrel length145 inches (3.7 m) (bore + chamber)[2]
Shell532 to 543 pounds (241.3 to 246.3 kg) Palliser, Common, Shrapnel
Calibre11-inch (279.4 mm)
Muzzle velocity1,360 feet per second (410 m/s)[3]

RML 11-inch 25-ton guns were large rifled muzzle-loading guns used as primary armament on British battleships and for coastal defence. They were effectively the same gun as the RML 12-inch 25-ton gun, bored to 11 inches instead of 12.

  1. ^ [1]
  2. ^ Treatise on Construction of Service Ordnance 1877, page 292
  3. ^ MV of 1,360 feet/second firing 543-pound 2-oz projectile with "Battering charge" of 85 pounds "P" (gunpowder) is quoted in "Text Book of Gunnery 1887" Table XVI.