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).
Pattern modification for an 8-cylinder exhaust valve guide.
| Identifier | ExFiles\Box 142\4\ scan0115 | |
| Date | 25th November 1938 | |
| 1202 also 1360 HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm.{William Robotham - Chief Engineer} c. RHC{R. H. Coverley - Production Engineer}/Vs.{J. Vickers} Rm{William Robotham - Chief Engineer}8/R.25.11.38. There is a pattern modification to the Exhaust Valve guide which we should like incorporating on the 8-cylinder pattern when you have obtained two castings from it. All the other castings should then be made to incorporate the modification. Rm.{William Robotham - Chief Engineer} | ||