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).
Design of non-roller type valve rockers and cams.
| Identifier | ExFiles\Box 43\3\ Scan102 | |
| Date | 30th December 1926 | |
| To E.{Mr Elliott - Chief Engineer} from R.{Sir Henry Royce} c. to BJ. RG.{Mr Rowledge} c. to BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} +4003 R1/M30.12.26. F.10. VALVE ROCKERS. X.4003 X.3822 X.3866 NON ROLLER TYPE. SKETCH. I cannot really understand why you say we must have curved surface not more than .75 radius = 1½" roller instead of proposed 2", unless cam becomes too pointed to wear well. SKETCH Regarding the cams and rockers is it not possible to proceed as follows: Arange the two cams as close together as they can be made, considering grinding. Locate a centre of the pad under each cam in plan, draw 2 centre lines. SKETCHES. It will be seen that if these propositions were possible, only 1-R and 1-L hand lever becomes necessary for all. It will be seen that such a lever would be a cross between your inlet and your exhaust: perhaps Also the stem should go to the centre of the boss. To get a good smooth bore in the rocker boss it should be the same size right through, so that it can be ground and lapped to a fine finish. R.{Sir Henry Royce} | ||