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).
Use and distinctive marking of Chromium and Silchrome valves for the 20 HP engine.
| Identifier | ExFiles\Box 54\3\ Scan203 | |
| Date | 2nd July 1924 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} X4634. Hs{Lord Ernest Hives - Chair}2/LG2.7.24. 20 HP. VALVES. We consider it would be quite in order to use the Chromium valves for the inlet. We believe the Silchrome valves have a different shaped head owing to the thickened ring being left round the seating. This would give the valves a distinctive marking. We think that the Chromium Valves should also be marked 'inlet'. Hs.{Lord Ernest Hives - Chair} | ||