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).
Performance comparison of high and low lift rockers with ramming, showing BHP vs RPM curves and valve timing diagrams.
| Identifier | ExFiles\Box 5a\5\ 05-page171 | |
| Date | 1st October 1931 guessed | |
| COMPARISON OF HIGH & LOW LIFT ROCKERS, WITH RAMMING RM.{William Robotham - Chief Engineer}45 CLAUDEL CARBS. JAPAN A C/R 5.15 HEAD MACHINED TO GIVE .225 CLCE ROUND INLET VALVE BEST TIMING FOR POWER 1 1/2" CAMSHAFT VALVE LIFT .395 VALVE LIFT .344 B.H.P. R.P.M. B.M.E.P. IN EX DIS CLCE 52 16.5 46 C AS ABOVE BUT INLET VALVE SHROUDED TIMING TOO EARLY FOR MAX POWER VALVE LIFT .395 VALVE LIFT .344 IN 55 EX 40 46 2 | ||