Used almost exclusively for coastal defense at Needles, Malta and Gibraltar. One gun was located at Bere Island for a short time.
Wire-wound construction, with the wire extending for about 60 percent of the barrel length, and was trunnioned. The breech was a three-motion type as completed and the interrupted screw block was cylindrical. A total of 14 guns were manufactured. Most guns were later modified to use a single-motion breech mechanism and altered so as to be able to use the same coastal mountings as the 9.2"/47 (23.4 cm) Mark X. Modified guns were designated as 'C' IX.
One gun was more extensively modified to use a Welin breech block, the trunnion ring was replaced by a seating for the naval mounting and two additional short tubes were screwed and shrunk on. This gun was designated as the Mark IX/X and used on the gunnery school boat Drudge.
|Designation||9.2"/47 (23.4 cm) Mark IX|
|Ship Class Used On||Coastal Defense and Drudge|
|Date Of Design||about 1895|
|Date In Service||1900|
|Gun Weight||Mark IX: 26.8 tons (27.2 kg)
Mark IX/X: 28.4 tons (28.9 tons)
|Gun Length oa||445.3 in (11.311 m)|
|Bore Length||430.0 in (10.922 m)|
|Chamber Volume||8,123 in3 (133.1 dm3)|
|Rate Of Fire||3 - 4 rounds per minute|
|Projectile Types and Weights||APC 2crh: 380 lbs. (172.4 kg)
CPC 2crh: 380 lbs. (172.4 kg)
|Bursting Charge||APC: N/A
CPC: 35.4 lbs. (16.1 kg)
|Projectile Length||APC: N/A
CPC: 35.4 in (89.9 cm)
|Propellant Charge||120 lbs. (54.4 kg) MD37
107 lbs. (48.5 kg) MD26
109 lbs. (49.4 kg) SC150
|Muzzle Velocity||MD37: 2,778 fps (847 mps)
Others: 2,748 fps (838 mps)
|Approximate Barrel Life||450 rounds|
|Ammunition stowage per gun||N/A|
|Range||Muzzle Velocity||Vertical Steel Plate|
|3,000 yards (2,740 m)||2,751 fps (839 mps)||14 in (35.6 cm)|
|4,550 yards (4,160 m)||9.2 in (23.4 cm)|
These figures are from "British Battleships: 1860 to 1950".
|3,000 yards (2,740 m)||9.7 in (24.6 cm)|
|6,000 yards (5,480 m)||7.7 in (19.6 cm)|
|9,000 yards (8,230 m)||5.3 in (13.5 cm)|
These figures are from "The Grand Fleet: Warship Design and Development 1906-1922" and assume a 90 degree inclination.
|Elevation||Army Coastal Artillery: -5 / +15, +30 or +35 degrees 1|
- ^The Gibraltar guns were mounted on the crest in a special mounting allowing 20 degrees depression.