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).
Lubrication of rocker adjusting screws for the Phantom III engine.
| Identifier | ExFiles\Box 96\2\ scan0186 | |
| Date | 11th December 1936 | |
| pw/as [crossed out] c. Rm.{William Robotham - Chief Engineer} [crossed out] c. Hw. [crossed out] c. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux} [crossed out] 354. Miller [handwritten] Swell - [handwritten] BY.9/G.11.12.36. PHANTOM 111 - RE: LUBRICATION OF ROCKER ADJUSTING SCREWS. --------------------------------------------------------- In view of the talk we had with Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} and bearing in mind Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}2/R.9.12.36. which covers the same ground, we have cancelled the instruction we received from the Design Department to drill a .015 hole in the bronze bush to allow a direct passage of oil feed to the adjusting screws. You will recollect that the reason GWH.{George W. Hancock - Head Chateauroux} wished us to cancel the instruction which we had just issued was that until he was able to find a means of controlling the oil on the rocker lever face operating from the cam by the use of wool tightly packed into the hole or asbestos, it was not possible to obtain satisfactory results on the engine, owing to the fact that over-oiling down the valve stems took place. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}; however, desired us to add grooves to the upper and lower balls on the tappet side, as these were beneficial even without the drilling of the .015 hole to give direct feed. BY.{R.W. Bailey - Chief Engineer} RM{William Robotham - Chief Engineer} [handwritten signature] | ||