Notification of an alternative steel material for the 40mm Type BD gun barrel.
| Identifier | ExFiles\Box 176\3\ img124 | |
| Date | 19th August 1940 | |
| To RM. {William Robotham - Chief Engineer} O {Mr Oldham} /C HPS. {Horace Percy Smith - Experimental Factory Mgr} O {Mr Oldham} /C BIK. O {Mr Oldham} /C Dy {F R Danby} /MM. Ve/NP.5/CB.19.8.40. 40 mm. TYPE BD {Mr Berend} GUN. Please note that the barrel for the above gun, drawing No. Q.1712, may now be made in Admiralty OO steel as an alternative to Vibrac (50 tons yield), minimum Ve/NP. | ||
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).