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 graph comparing timing alterations on a 112° camshaft with two Claudel carburettors.
| Identifier | ExFiles\Box 181\M13\M13.2\ img106 | |
| Date | 23th September 1931 | |
| RM.{William Robotham - Chief Engineer} 35 COMPARISON OF TIMING ALTERATIONS ON 112° CAMSHAFT WITH TWO CLAUDEL CARBS. INLET VALVE DIA 1.4 C/R 5.13-1 OPEN EXHAUST 112° CAMSHAFT STANDARD ROCKERS. HEAD MACHINED TO GIVE MINIMUM CLCE. OF ROUND INLET VALVE .275" TIMING A TOOTH EARLIER B VALVE LIFT .344 B.H.P. R.P.M. INDUCTION DEPN. LBS/SQ TIMING DIAGRAM A: Ex. 46, IN 46 .013 CLCE. 3.2 10.8 TIMING DIAGRAM B: Ex. 40, IN 55 4.6 2.0 23-9-31 | ||