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).
Query regarding a material change for the carburetter air silencer from 28 SWG to 26 SWG planished steel due to sourcing difficulties.
| Identifier | ExFiles\Box 93\1\ scan0070 | |
| Date | 15th December 1936 | |
| B.W. C. Rm.{William Robotham - Chief Engineer} Wyman - What about this Rm{William Robotham - Chief Engineer} 323 Roy{Sir Henry Royce}/Dn7/ME.15.12.36. RE: CARBURETTER AIR SILENCER. We observe from the Carburetter Air Silencer Shell drawings - "Bentley" E.B.2915, and 25/30-HP. - E.61228, that they are specified in 28 SWG planished steel. We find in enquiring for these parts that there is considerable difficulty in getting 28 SWG. material, but we can obtain 26 SWG. (.018) much more easily, the difference in thickness is .004. May we be permitted to employ 26 SWG. please ? We understand from Mr. White, Derby, who has made several of these Silencers for Exptl. Dept. that all his samples were produced in 26 SWG. Rm{William Robotham - Chief Engineer} Reply sent to Roy{Sir Henry Royce} & By.{R.W. Bailey - Chief Engineer} Goodbyrum ROY.{Sir Henry Royce} | ||