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).
Photographs of a 40mm Naval Gun converted to an automatic aircraft weapon for endurance trials.
| Identifier | ExFiles\Box 176\1\ img222 | |
| Date | 19th May 1942 | |
| SECRET. To Rm.{William Robotham - Chief Engineer} from Ve/NP. Ve/NP.5/CB.19.5.42. Attached herewith are photographs of the 40 mm. Gun, type BH Mark I. This is the 40 mm. Naval Gun converted to a 9-round Automatic weapon for use in aircraft and the photographs show the gun as submitted for the endurance trials at Boscombe Down during April. Ve/NP. SE | ||