RML 64 pounder 64 cwt gun
|RML 64 pounder 64 cwt gun|
Fortification mounted MK III gun firing at Fort Glanville Conservation Park, South Australia
|Place of origin||United Kingdom|
|In service||1865 - 190?|
|Used by||British Empire|
Elswick Ordnance Company
|Variants||Mk I, II, III|
|Weight||64-long-hundredweight (3,300 kg)|
|Length||9 ft 10 inches|
|Barrel length||97.5 inches bore|
|Shell||64 pounds (29 kg)|
|Calibre||6.3 inches (160 mm)|
|Breech||none – muzzle-loading|
wrought-iron tube : 1,252 feet per second (382 m/s)|
Mk III steel tube : 1,390 feet per second (420 m/s)
|Effective firing range||5,000 yards (4,600 m)|
The RML 64 pounder 64 cwt gun was a Rifled, Muzzle Loading (RML) naval, field or fortification artillery gun manufactured in England in the 19th century, which fired a projectile weighing approximately 64 pounds (29 kg). "64 cwt" refers to the gun's weight rounded up to differentiate it from other "64-pounder" guns.
The calibre of 6.3 inches was chosen to enable it to fire remaining stocks of spherical shells originally made for the obsolete 32 pounder guns if necessary.
Mark I (adopted in 1864) and Mark II (adopted 1866) guns, and Mark III guns made from 1867 - April 1871 had wrought-iron inner "A" tubes surrounded by wrought-iron coils.
Mark III guns made after April 1871 were built with toughened mild steel "A" tubes, and earlier Mark III guns were re-tubed with steel and were classified as a siege gun in land service. Remaining guns with iron tubes were used for sea service.
Rifling of all guns consisted of 3 grooves, with a uniform twist of 1 turn in 40 calibres (i.e. 1 turn in 252 inches).
The gun's standard shell was "common shell", for firing on troops in cover, ships and buildings, weighed 57.4 pounds (26.0 kg) when empty with a bursting charge of 7.1 pounds (3.2 kg). Shrapnel shells could also be fired; a 66.6 pounds (30.2 kg) shell with a 9-ounce (260 g) bursting charge propelling 234 metal balls.
Surviving Examples of Guns
- Mk I, Mk II no 164 and Mk III guns at Fort George, near Inverness, Scotland, UK
- Mark III gun at Nothe Fort, Weymouth, UK
- Mark III gun at Fort Brockhurst, Gosport, UK
- Mark III Gun number 17 on board HMS Gannet, Chatham Dockyard, UK
- Two Mark III guns, including no. 318 dated 1867 at Pendennis Castle, Cornwall, UK
- Two Mark III guns number 462 and 463 at Fort Glanville, Adelaide, South Australia
- Mk III gun no. 739 of 1878 at Townsville, Queensland, Australia
- Two Mk III guns at Fort Lytton Historic Military Precinct, Brisbane, Australia
- Lei Yue Mun Fort's Central Battery, Hong Kong
- 6 guns at Fort Siloso, Singapore including Mark III gun No. 767 of 1874
- RML 64-pr 64 cwt Mk 3 at Albert Park, Auckland, Auckland, New Zealand
64 pound naval gun ex HMQS Otter. Type mark 111 manufactured 1878 serial number 742 is on display in queens park Toowoomba. Gun is in excellent condition.
Surviving Examples of Ammunition
- RML 64pdr shell that has been fired, and RML 64 fuse at Fort Lytton Historic Military Precinct, Brisbane, Australia
Notes and references
- A Guide to Fort Glanville, South Australia. Semaphore Park, South Australia: The Fort Glanville historical association. 2000.
- 1,252 feet/second firing a 64-pound projectile with 8 pounds R.L.G. gunpowder is quoted for wrought-iron tubed guns in "Treatise on Construction and Manufacture of Service Ordnance, 1879", page 363. 1,390 feet/second firing a 65-pound projectile using 10 pounds R.L.G.4 gunpowder is quoted for Mk III steel tube gun in Table XII in "Text Book of Gunnery 1902".
- Treatise on Construction and Manufacture of Service Ordnance, 1879, pages 292, 261-265
- "The 64pr. 64 cwt gun Mark III". Palmerston Forts Society, Fareham Hampshire U.K. Retrieved 2009-01-20.
- The two 1878 guns are still fired regularly "Gun-firing Re-enactment | Fort Lytton Historic Military Precinct". fortlytton.org.au. Retrieved 13 August 2016.
- Treatise on the Construction and Manufacture of Ordnance in the British Service. War Office, UK, 1879
- Text Book of Gunnery, 1902. LONDON : PRINTED FOR HIS MAJESTY'S STATIONERY OFFICE, BY HARRISON AND SONS, ST. MARTIN'S LANE
|Wikimedia Commons has media related to RML 64 pounder 64 cwt Gun.|
- YouTube video showing re-enactment of loading and firing with blank cartridge at Fort Lytton, Queensland
- Handbook for the 64 - pr. R.M.L. gun of 64 cwt., marks I-III land service 1888, 1893, 1900, 1902 at State Library of Victoria
- Diagram of gun on 6 foot parapet platform mounting at Victorian Forts website