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2. BL 12-inch Mk I – VII naval gun - Wikipedia

   en.wikipedia.org/wiki/BL_12-inch_Mk_I_–_VII...

   By July 1880, a 12-inch rifled breech-loading gun of 43 tons was in advanced state of construction. [10] Later in 1880, a 43 tons gun was mentioned as being prepared at Woolwich for trial. It was 358 inches (9.1 m) inch long and meant to use a charge of 285 pounds (129 kg) of P2 powder to fire a projectile of 714 pounds (324 kg).

3. Rodman gun - Wikipedia

   en.wikipedia.org/wiki/Rodman_gun

   These heavy guns were intended to be mounted in seacoast fortifications. 8-inch, 10-inch, 13-inch, 15-inch, and 20-inch bore (20, 25, 33, 38, and 51 cm) Rodman guns were produced. Other than size, the guns were all nearly identical in design, with a curving bottle shape, a large flat cascabels , and ratchets or sockets for the elevating mechanism.

4. BL 12-inch Mk I – II naval gun - Wikipedia

   en.wikipedia.org/wiki/BL_12-inch_Mk_I_–_II...

   By July 1880, a 12-inch rifled breech-loading gun of 43 tons was in advanced state of construction. [10] Later in 1880, a 43 tons gun was mentioned as being prepared at Woolwich for trial. It was 358 inches (9.1 m) inch long and meant to use a charge of 285 pounds (129 kg) of P2 powder to fire a projectile of 714 pounds (324 kg).

5. BL 12-inch railway gun - Wikipedia

   en.wikipedia.org/wiki/BL_12-inch_railway_gun

   The remaining recoil energy was absorbed by allowing the entire railway wagon to roll backwards 40 feet (12 m) [6] (Vickers carriage) or 3–4 yards (2.7–3.7 m) [7] (Armstrong carriage) against locked brakes. This "rolling recoil" system allowed the gun to be operated without the need to construct a pit with a strong static platform below the ...

6. RML 12.5-inch 38-ton gun - Wikipedia

   en.wikipedia.org/wiki/RML_12.5-inch_38-ton_gun

   The gun originated from a desire for a longer 12 in (30 cm) gun than the existing RML 12-inch 35-ton gun.Experiments in 1874 with both 12 in (30 cm) and 12.5 in (32 cm) versions 3 ft (91 cm) longer than the existing 12 in (30 cm) gun showed the 12.5 in (32 cm) calibre was more suitable, and further experiments showed a projectile of 800 lb (360 kg) could be fired with a charge of 130 lb (59 kg ...

7. RML 12-inch 35-ton gun - Wikipedia

   en.wikipedia.org/wiki/RML_12-inch_35-ton_gun

   This gun design originated in 1871 as an 11.6-inch (295 mm) gun firing a 700-pound (317.5 kg) projectile. Results were unsatisfactory, leading to the gun being bored out to 12 inches (305 mm) and firing a 706-pound-12-ounce (320.6 kg) shell. [2]