QF 13-pounder 6 cwt AA gun
QF 13 pounder 6 cwt anti-aircraft gun | |
---|---|
hydro-spring, constant, 25 in (0.64 m)[2] | |
Carriage | high-angle mounting on lorry |
Elevation | 0°–70°[2] |
Traverse | 360° |
Maximum firing range | 17,000 ft (5,200 m)[2] |
The Ordnance QF 13 pounder Mk III anti-aircraft gun, also known as 13 pounder 6 cwt, was an early British improvisation in World War I to adapt the
History
This was a standard
It was first approved in October 1914 and was issued on Mk I high angle mounting, usually mounted on a motor lorry. The Mk I mounting had an additional
Mk II mount improved the usability, added deflection gear and the recoil system was improved so that the additional recuperator became unnecessary and was removed.[3] On the Mk II mount the gun has the appearance of a standard 13 pounder.
The mount design was unusual in having both
Following World War I, the guns were returned to service as standard 13 pounder field guns.
Combat use
The gun's performance was "ballistically poor" and it was only marginally effective against aircraft.
Performance
Gun | muzzle velocity |
Shell weight |
Time to 5,000 ft (1,500 m) at 25° (seconds) |
Time to 10,000 ft (3,000 m) at 40° (seconds) |
Time to 15,000 ft (4,600 m) at 55° (seconds) |
Max. height[6] |
QF 13 pounder Mk III | 1,600 ft/s (490 m/s) |
12.5 lb (5.7 kg) |
17,000 ft (5,200 m) | |||
QF 13-pounder 9 cwt | 1,990 ft/s (610 m/s)[ii] |
12.5 lb (5.7 kg) |
10.1 | 15.5 | 22.1 | 19,000 ft (5,800 m) |
QF 12-pdr 12 cwt | 2,200 ft/s (670 m/s) |
12.5 lb (5.7 kg) |
9.1 | 14.1 | 19.1 | 20,000 ft (6,100 m) |
QF 3-inch 20 cwt ( 1914) |
2,500 ft/s (760 m/s) |
12.5 lb (5.7 kg) |
8.3 | 12.6 | 16.3 | 23,500 ft (7,200 m) |
QF 3 inch 20 cwt (1916) |
2,000 ft/s (610 m/s) |
16 lb (7.3 kg) |
9.2 | 13.7 | 18.8 | 22,000 ft (6,700 m)[8] |
QF 4-inch Mk V (World War I) |
2,350 ft/s (720 m/s) |
31 lb (14 kg) ( 3 c.r.h. ) |
4.4 [sic] | 9.6 | 12.3 | 28,750 ft (8,760 m) |
QF 4 inch Mk V (World War II)[9] |
2,350 ft/s (720 m/s) |
31 lb (14 kg) ( 4.38/6 c.r.h. ) |
? | ? | ? | 31,000 ft (9,400 m) |
See also
References
- ^ a b c Routledge (1994), p. 6.
- ^ a b c d Hogg & Thurston (1972), p. 61.
- ^ a b c Hogg & Thurston (1972), p. 60.
- ^ Routledge (1994), p. 27.
- ^ a b Routledge (1994), p. 9.
- ^ Hogg & Thurston (1972), pp. 234–235.
- ^ Hogg & Thurston (1972), p. 65.
- ^ Routledge (1994), p. 13.
- ^ Tony DiGiulian, British 4"/45 (10.2 cm) QF Mark V and Mark XV
Bibliography
- ISBN 978-0-7110-0381-1.
- Routledge, Brigadier NW (1994). History of the Royal Regiment of Artillery. Anti-Aircraft Artillery, 1914-55. London: Brassey's. ISBN 978-1-85753-099-5.