From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Firing trial results for Gun 11240 on a Beaufighter aircraft at Duxford.
| Identifier | ExFiles\Box 176\1\ img217 | |
| Date | 29th September 1941 | |
| Phoned by Ve/NP. 29.9.41. to Rm{William Robotham - Chief Engineer}/ET. GUN 11240 BEAUFIGHTER - DUXFORD 6.9.41. Ground firing. 8 single shots. 8 auto Speed 100 rounds per minute. 12.9.41 Flight trials. 8 single shots. 9 auto Stoppage after 1 " 4 (feed trouble) 14.9.41 Ground firing. 1 single shot. 8 auto. 16.9.41 Flight trials. 8 single shots. 17.9.41 " " 8 auto . " " 8 " . " " 8 " 25.9.41 " " 8 " 26.9.41 " " 8 " at 4 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} 8 " 8 " Speed 124 rounds per minute. | ||