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).
Progress report letter to the Ministry of Aircraft Production on the development of a half-inch gun.
| Identifier | ExFiles\Box 176\1\ img094 | |
| Date | 7th October 1940 | |
| Rm.{William Robotham - Chief Engineer}2/ML. 7.10.40. S The Ministry of Aircraft Production, Thames House, Millbank. LONDON. For the attention of Sir John Salmond. Dear Sirs, HALF INCH GUN. Some considerable progress has been made during the past fortnight. Several bursts of twelve rounds have been fired. Development is proceeding to eliminate causes of unreliability. Yours faithfully, for ROLLS ROYCE LTD., | ||