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).
Addition of tappet retaining plates for Wraith III and Bentley 111 engines.
| Identifier | ExFiles\Box 158\4\ scan0200 | |
| Date | 16th December 1937 | |
| Copied 11/1 Filed Detailed DY{F R Danby}/NS{Norman Scott} C. Rm.{William Robotham - Chief Engineer} 1360. DA.{Bernard Day - Chassis Design}8/G.16.12.37. Rm{William Robotham - Chief Engineer} 485 Spring Plates WRAITH 111 and BENTLEY 111. TAPPET RETAINING PLATES. Please receive herewith . E.CD.293 Tappet Retaining Plates - Wraith 111 and Bentley 111. Although a suction release hole was added to the spherical cup in tappet, to prevent tappet from lifting out of crankcase when removing push rods, it has not proved to be a cure for the trouble. We have therefore added in the tappet covers, sheet aluminium plates which prevent the tappets lifting completely out of their bores while the tappet doors are in position, as suggested by the Experimental Department. The suction release holes in tappets should be omitted when the retaining plates are fitted. We have shown a scrap view on the drawing, showing the retaining plates fitted to existing tappet doors for use on existing engines. Will you please detail and instruct the necessary parts as soon as possible, so that the retaining plates may be fitted to the Wraith 111 car shortly due to go to France, they should also be fitted to the six cars now being made. EW 1583. By/CS2/EH 22-12-37. DA.{Bernard Day - Chassis Design} | ||