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).
Producing improved camshaft forms for the 20 HP car, referencing related blueprints.
| Identifier | ExFiles\Box 13\2\ 02-page054 | |
| Date | 8th June 1929 | |
| R.{Sir Henry Royce} c. Sg.{Arthur F. Sidgreaves - MD} c. Wor.{Arthur Wormald - General Works Manager} c. Hs.{Lord Ernest Hives - Chair} c. DA.{Bernard Day - Chassis Design} X4090 BYL/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 8.6.29. X4090 X5090 X1770 CHINA. VALVE TIMING - RE CAMSHAFT. -------------------------------- Referring to RL/M5.6.29., we had already in anticipation of your views, produced cam forms for the 20 HP car which follow closely all the improvements incorporated in the SS.{S. Smith} camshaft. We are sending herewith blueprints of Schs. 1153/1158 showing the inlet valve and exhaust valve lift curves for the cam forms in question, and on the same drawings we have indicated the valve lift curves for the present type cam forms. We put the improved cam forms in hand immediately the larger bore was mooted, as it was evident that similar advantages would be required for the cam forms in this case under the new conditions as for the SP.{Mr Spinney} B². | ||