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(Experimental Engine) 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 | ||
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).