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).
Internal memorandum requesting the order of rubber washers with specific hardness requirements.
| Identifier | ExFiles\Box 115\2\ scan0409 | |
| Date | 23th January 1939 | |
| 1020 To Roy.{Sir Henry Royce} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. G/JWH. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}23.1.39. Will you please order rubber washers in accordance with the attached drawing ExS.1377. 6 to have a durometer hardness of 70-75. 6 " " " " " of 50-55. as per drawing. These should definitely be in rubber and not Neoprene, also we should like to know what involved cost will be before ordering. O/N. 52444. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||