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).
Sourcing and specification of steel for Mk. 14 Naval gun barrels.
| Identifier | ExFiles\Box 176\3\ img119 | |
| Date | 14th August 1940 | |
| Ve. from Rm.{William Robotham - Chief Engineer} The Admiralty tentatively agreed to produce the barrels for our Mk.{R. E. B. Meade-King} 14. Naval guns, in the plants at present producing their 2-pounder Mk.{R. E. B. Meade-King} 8. barrels. Apparently, they do not use Vibrac on any other guns they are producing and are querying whether their normal nickel chrome molybdenum steel will be satisfactory. I attach a specification of this steel for your information, and, as far as I can see, there should be no difficulty in getting the 40/50 tons per sq/ins. yield which we ask for on Vibrac. The Admiralty also ask whether it is possible to specify AA.{D. Abbot-Anderson} alloy steel for some of the less important parts in the gun as they have large quantities of this steel at their disposal. We shall be glad, therefore, if you would specify this steel on your drawings of any parts for which you think it would be suitable. Attached are Admiralty specifications M.55.T. and M.55.U. We shall be glad if you will return these specifications when you have finished with them. RM.{William Robotham - Chief Engineer} | ||