Performance
The following table compares the gun's performance with the other British World War I anti-aircraft guns:-
| Gun | muzzle velocity (ft/s) | Shell (lb) | 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 (ft) |
|---|---|---|---|---|---|---|
| QF 13 pounder Mk III | 1600 | 12.5 | ? | ? | ? | 17,000 |
| QF 13 pounder 9 cwt | 1990 | 12.5 | 10.1 | 15.5 | 22.1 | 19,000 |
| QF 12 pdr 12 cwt | 2200 | 12.5 | 9.1 | 14.1 | 19.1 | 20,000 |
| QF 3 inch 20 cwt 1914 | 2500 | 12.5 | 8.3 | 12.6 | 16.3 | 23,500 |
| QF 3 inch 20 cwt 1916 | 2000 | 16 | 9.2 | 13.7 | 18.8 | 22,000 |
| QF 4 inch Mk V WWI | 2350 | 31 (3 c.r.h.) | 4.4?? | 9.6 | 12.3 | 28,750 |
| QF 4 inch Mk V WWII | 2350 | 31 (4.38/6 c.r.h.) | ? | ? | ? | 31,000 |
Read more about this topic: QF 13 Pounder 9 Cwt
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