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).
Agreement to change the material for Wraith air silencer frames and end caps, resulting in a cost saving.
| Identifier | ExFiles\Box 152\3\ scan0248 | |
| Date | 2nd April 1938 | |
| 1297. To By.{R.W. Bailey - Chief Engineer} c. to RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister} Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}2/JH.2.4.38. AIR SILENCERS. Replying to RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister}1/MC.29.3.38. we are in agreement with your proposal to fit 18 S.W.G. S/D in place of aluminium for frame E.83767 and end cap E.83764 on Wraith air silencers. We understand this shows a saving of 4d. per chassis. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||