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).
Changing valve sealing washers from Neuprene to thin aluminum for the B.V. & Wraith III models.
| Identifier | ExFiles\Box 10\3\ 03-page215 | |
| Date | 31th May 1939 | |
| 65H & 45H To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. MX.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}11/MH.{M. Huckerby}31.5.39. VALVE SEALING WASHERS (B.V. & WRAITH III). Further to our memo Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/MH.{M. Huckerby}13.5.39 regarding the making of 4 more sets of special top sealing washers to ECD.1022 with Neuprene rings to suit, MX.{John H Maddocks - Chief Proving Officer} has since found that thin alum washers are more satisfactory than Neuprene. These are used with the original type of top washer EX.32222 which has a straight sided recess, not conical as ECD.1022 (Ex.1925). In view of the above, will you please instruct that the 4 sets we have requested be made to Ex.32222 with alum washers to suit, details of which are being made. As our previous memo, these should be fitted to the inlet valves of W.III No.10 and Wraith Ripple No.1 unit. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||