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).
Letter to English Steel Corporation regarding the preferred material for 40 mm gun barrels.
| Identifier | ExFiles\Box 176\3\ img221 | |
| Date | 5th September 1940 | |
| 2L EXPERIMENTAL DEPARTMENT. 5th September, 1940. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}4/ET. English Steel Corporation, Vickers Works, S H E F F I E L D.{John DeLooze - Company Secretary} Dear Sirs, re 40 mm. Gun (Mark III - Type B.D.) With reference to the manufacture of barrels for the above, the question of material was raised. It was stated that you would prefer to continue making these barrels in Vibrac rather than Admiralty "OO" steel. We would be obliged if you would confirm this point. Yours faithfully, | ||