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).
Blueprint detailing aircraft armament specifications with a top-down schematic.
| Identifier | ExFiles\Box 176\1\ img033 | |
| Date | 17th July 1940 guessed | |
| 8 - 7.7m/m GUNS. 300 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 1100 ROUNDS PER MINUTE PER GUN. MUZZLE VELOCITY 2440 FT./SEC. 4 - 12.5m/m GUNS | ||