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).
Power output chart for a C18 unit with camshaft E57177, showing performance with a larger carburetter under various exhaust configurations.
| Identifier | ExFiles\Box 179\2\ img044 | |
| Date | 4th December 1931 | |
| POWER OUTPUT C18 UNIT CHINA CAMSHAFT E 57177 (110.5°) C/R 5.74 STANDARD 15% LARGER R.R. CARBURETTER LEGEND: ① OPEN EXHAUST ② C.O. OPEN ③ COMPLETE EXHAUST SYSTEM & DOWNTAKE VALVE TIMING DIAGRAM: Ex In 6 40.5 43.7 OZO CLCE AXIS LABELS: COMP. PR.{Percy H. Rose} LBS/SQ" R.P.M. LATE TIMING | ||