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).
Comparison of engine timing diagrams for standard and low lift camshafts, including clearance values.
| Identifier | ExFiles\Box 43\3\ Scan181 | |
| Date | 18th September 1928 | |
| To BY/CGH.{W Clough} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X4003 X4673 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG18.9.28. With reference to Py/BLB11/AV/CP17.9.28 attached. The timing of the engine cold with standard and low lift camshaft is as follows [Left Diagram - STANDARD CAM.] I.O 9° E.C. 10° I.C. 48° E.O. 30° [Right Diagram - LOW LIFT. CAM.] I.O. 15° E.C. 4° I.C. 44°. E.O. 52° .015" CLEARANCE RUNNING CLEAR: { Inlet - .015" Ex - .025" The water capacity of the engine is approx. 5 galls. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||