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).
Modifications to the reverse gear thrust surface and the servo drive lubrication system.
| Identifier | ExFiles\Box 15\5\ Scan365 | |
| Date | 17th December 1932 | |
| Y7310 HS{Lord Ernest Hives - Chair}/GRY.{Shadwell Grylls} FROM HDY.{William Hardy} HDY{William Hardy}/AM/17.12.32. C. to EY. E.{Mr Elliott - Chief Engineer} RIC. P. 2. SYNCHROMESH. REVERSE GEAR. We agree that a thrust surface should be provided to prevent movement of the reverse shaft beyond the correct position under load, as we think it impossible to eliminate all end thrust with a sliding shaft, and there is the saving feature that the end thrust can only be light. By turning the bush end for end the flange becomes available for a thrust surface. We now understand from E.{Mr Elliott - Chief Engineer} that RIC. suggests that whitemetal lined steel bushes will enable the expanding of the bush to be satisfactorily done so that in this case N. scheme 3492. should be worked to at least for the rear bush. LUBRICATION OF THE SERVO DRIVE. The oil feeding scheme first used on Phantom 2. was instructed by R.{Sir Henry Royce} to make sure that the servo drive received lubrication even when the box was short of oil. We understand that the experiments that have been made have shewn that the oil feeding scheme as used on Phantom and the 20/25. prior to the introduction of sliding reverse shaft will do what it was originally intended to do. In view of the above and the small cost of the troughs on the side of the box we think that they should be retained on all cars. HDY.{William Hardy} | ||