RML 7 inch 7 ton gun
| RML 7 inch 7 ton gun | |
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| General Information | |
| Military designation: | RML 7 inch 7 ton gun |
| Manufacturer designation: | RML 7 inch 7 ton gun |
| Manufacturer country: |
 United Kingdom
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| Development year: | 1865 |
| Production time: | 1865 to? |
| Number of pieces: | Mk I: 51 Mk II: 2 Mk III:? |
| Model variants: | Mk I, II, III |
| Weapon Category: | cannon |
| Technical specifications | |
| Pipe length: | 18 caliber / 3.2 |
| Caliber : |
7 inch (177.8 mm) |
| Number of trains : | 3 |
The RML gun ton inch 7 7 was a British cannon , which in the coastal artillery was used.
history
The first breech-loading guns ( RBL - Rifled Breech Loading) rifled were from Armstrong developed and in 1859 the British Army and the Royal Navy introduced. However, these guns could not convince in action. Therefore, the British Army and the Royal Navy switched to rifled muzzle loading ( RML ) again from the mid-1860s . The rifled barrel was retained, however.
The RML 7 inch 7 ton gun was designed for use in coastal artillery. It is constructed in the same way as the RML 7 inch 6½ ton gun and looks similar to it. However, this was mainly intended for use as a ship gun and is shorter than the 7 tons version due to the space available on board . The penetration rate was around 2 cm iron at a distance of 910 m.
construction
The Mk I version was developed in 1865. It resembles the RML 7 inch 6½ ton gun Mk I . However, the tube is longer and the number of rings in the jacket tube has been reduced from six to five to save weight. The jacket pipe corresponded to the construction of Armstrong and consisted of several layers of thin iron. The Mk II version followed in 1866. Except for the length of the barrel, it also corresponded to the RML 7 inch 6½ ton gun Mk II . Compared to the Mk I, the number of rings on the jacket tube has been reduced. The ring above the rear of the cannon was forged. In the Mk III version developed in the same year, the forged ring was abandoned and the shape was changed slightly. It also corresponded to its counterpart 6½ ton except for the length of the pipe.
The grenades used were provided with wart-shaped elevations that slid along the rifling of the barrel and thus enabled the projectile to be inserted from the front.
Construction of the tube (Mk III)
Grenade caliber 7 inch Mk III
Grenade caliber 7 inch Mk VI
The gun did not have a barrel return mechanism . In order to absorb the forces of the recoil , special mount designs were necessary. When setting up the pivot, the lower mount could be rotated around a pin. The cannon was mounted on a wall mount that was placed on the lower mount. A similar construction was used when setting up the casemate.
Coastal artillery
Cannons of this type were relatively common in all parts of the British Empire. In general, however, aiming accuracy and penetration ability were considered insufficient. When fighting fast targets like the emerging torpedo boats, the cadence also proved to be insufficient. This type was therefore replaced from the 1880s by Schnellfeuerkansonen (OF - Quick Fire) and soon afterwards by more modern breech loading cannons (BL - Breech Loading). The breech- loaders in particular had an enormously increased range at high cadence compared to the muzzle-loaders, which made some coastal fortifications such as Żonqor Battery on Malta superfluous.
User countries
Individual evidence
- ^ A b Treatise on the Construction and Manufacture of Ordnance in the British Service. 1877, pp. 272f.
- ^ Text Book of Gunnery 1887. Table XVI, page 312.
- ^ Treatise on the Construction and Manufacture of Ordnance in the British Service. 1877, pp. 77f.
- ^ Treatise on the Construction and Manufacture of Ordnance in the British Service. 1877, p. 270ff.
- ^ Text Book of Gunnery 1887. Table XVI, page 313.
- ↑ http://www.palmerstonforts.org.uk/art/gallery1/large/ascn03.jpg
- ↑ http://www.palmerstonforts.org.uk/art/7inR1.htm ( Memento from August 30, 2010 in the Internet Archive )
Web links
- Text Book of Gunnery. 1887.
- Treatise on the construction and manufacture of ordnance in the British Service. 1877.
literature
- Treatise on the construction and manufacture of ordnance in the British Service prepared in the Royal Gun Factory. Printed in Order of the Secretary of State of War, London 1877.
- Text Book of Gunnery. Printed for His Majesty's Stationery Office by Harrison and Sons, St Martin's Lane, London 1887.