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 graph for a 'Japan Unit' engine with specified carburettor, camshaft, and valve modifications.
| Identifier | ExFiles\Box 179\2\ img058 | |
| Date | 12th December 1931 | |
| RM.{William Robotham - Chief Engineer} 58 POWER OUTPUT WITH R.R. CARBS TO LEC 2924 JAPAN UNIT. 112° SHAFT. INLET & EXHAUST CAMS TO E.55358 HIGH LIFT ROCKERS OPEN EXHAUST INLET VALVE DIA 1.4 MACHINED TO GIVE MIN CLCE .225 ROUND VALVE C.R. 5.85-1 CHOKE DIA .90" Valve Timing Diagram: T.D.C. 12 EX 59 DIZ CLCE IN 507 Graph Axes: X-Axis: R.P.M Y-Axis Labels (Left): p, I, B Y-Axis Labels (Right): p, M, B | ||