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).
Proposals for an oil seal on the valve spring top washer for the Wraith III and Bentley 111 models.
| Identifier | ExFiles\Box 100\3\ scan0010 | |
| Date | 10th November 1938 | |
| BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} c. Mx.{John H Maddocks - Chief Proving Officer} c. Rm{William Robotham - Chief Engineer}/Swdl{Len H. Swindell} # HSH & 654 DA.{Bernard Day - Chassis Design}24/G.10.11.38. WRAITH File WRAITH 111 and BENTLEY 111 - OIL SEAL FOR VALVE SPRING TOP WASHER. Herewith please receive:- E.CD.1014 Oil Seal for Valve Spring Top Washer - Wraith 111. This is a further suggestion for prevention of oil flow through the split of the top washer wedges to that shown on E.CD.846 which proved very effective, but unfortunately refused to remain in position on some of the valves on the Bentley 111 car recently run in France. There are two methods shown on E.CD.1014, Figure 1. having small strips of 'Neoprene' moulded to each side of the split in the wedge, various proposals to facilitate the moulding operation being given on the design, all the parts for this proposal are standard except for the addition of the 'Neoprene'. Figure 11. shows a reduced length of wedge from standard, with the lower ends of the wedge moulded on to a shaped 'Neoprene' ring moulded to correct size to form an oil seal in the valve spring washer, the remaining parts being standard. We are getting in touch with the outside people who will be asked to do the rubber moulding to ascertain from them the most suitable of the proposals for the moulding of the rubber for Figure 1. scheme, and we will then instruct which proposal should be detailed. Figure 11. should be detailed and instructed experimentally in the meantime. DA.{Bernard Day - Chassis Design} | ||