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).
The exhaust valve guide and stem for the B.60 engine, suggesting component testing for comparison.
| Identifier | ExFiles\Box 124\1\ scan0048 | |
| Date | 18th March 1939 | |
| 1044 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}8/R.18.3.39. EXHAUST VALVE GUIDE & STEM. B.60. Are you satisfied that we have the latest drawings on the exhaust guide valve and stem on B.60 engine? Generally speaking, there is more work on the side valve than the overhead valve, due to overhead lubrication difficulties. We should at least try nitrided stems on one or two valves, and close clearance burnished valve guides to get a figure of comparison. Rm.{William Robotham - Chief Engineer} | ||