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).
Urgent memo requesting modifications to the exhaust valve seats on a Wraith cylinder head.
| Identifier | ExFiles\Box 8\6\ 06-page31 | |
| Date | 31th May 1938 | |
| 619 URGENT. X To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}31.5.38. WRAITH CYLINDER HEADS. Further to our memo Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}9/MH.{M. Huckerby}27.5.38 in which you opened up the inlet seats of the small valve head to take a standard inlet valve, will you now please carry out the following on this same head which is available for the job. The exhaust seat throats are at present 1.3 dia. and leaving these at 1.3 machine taper to take standard 1.4 valves, following which standard exhaust valves to be fitted to E.61299. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||