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 graphs for a CXII High Lift Unit showing power output and compression with various manifold and silencer setups.
| Identifier | ExFiles\Box 5a\5\ 05-page186 | |
| Date | 4th December 1931 guessed | |
| UNIT FITTED TO 20 G & K CHINA RM{William Robotham - Chief Engineer} 53 POWER OUTPUT CXII UNIT HIGH LIFT CAMSHAFT B.57177 (110 S°) 5.78 C/R KEY: ① CUT OUT OPEN ② SMALL MANIFOLD (1.6 DOWNTAKE) FRONT EXP. BOX P.I. SILENCER 1:5 FISHTAIL ③ LARGE MANIFOLD (1.875 DOWNTAKE) 1.875 STRAIGHT THROUGH DIAGRAMS: Valve Timing: TDC, Ex, In, 36, 48.4, 020 CLCE Manifold: LARGE MANIFOLD, SMALL MANIFOLD, 1.6 DOWNTAKE, 1.875 DOWNTAKE, P.I SHORT TYPE SILENCER AXES: Left Y-Axis: B.H.P., COMPRESSION PRESSURE (LBS SQ ") Bottom X-Axis: RPM Right Y-Axis: B.M.E.P. (LBS SQ "), INDUCTION DEPN INS Hg LABELS: STD. CYL HEAD AND INLET VALVES INDUCTION DEPN INS Hg | ||