Ordnance RBL 7-inch gun | |
---|---|
Type | Naval gun Coast Defence gun |
Place of origin | United Kingdom |
Service history | |
In service | 1861–190? |
Used by | United Kingdom |
Wars | New Zealand Wars Bombardment of Kagoshima Bombardment of Shimonoseki |
Production history | |
Designer | W.G. Armstrong Co. |
Manufacturer | W.G. Armstrong Co. Royal Gun Factory |
Unit cost | £425 - £650[1] (£47000-£72000 in 2013) |
Produced | 1859–1864 |
No. built | 959[2] |
Variants | 82cwt, 72cwt |
Specifications | |
Barrel length | 99.5 inches (2.527 m) bore (14.21 calibres)[3] |
Shell | 90 to 109 pounds (40 to 50 kg)[4] |
Calibre | 7-inch (177.8 mm)[3] |
Breech | Armstrong screw with vertical sliding vent-piece (block) |
Muzzle velocity | 1,100 feet per second (340 m/s)[3] |
Maximum firing range | 3,500 yards (3,200 m)[5] |
The Armstrong RBL 7-inch gun, also known as the 110-pounder,[4] was a heavy caliber Armstrong gun, an early type of rifled breechloader.
William Armstrong's innovative combination of a rifled built-up gun with breechloading had proven suitable for small cannon. When it was applied to a 7-inch gun, it proved that the pressure caused by the explosive charge that was required to propel a 110-pound shot was too much for his breechloading system.