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).
Graph of engine power output curves against RPM for various exhaust configurations, including a valve timing diagram.
| Identifier | ExFiles\Box 102\5\ scan0112 | |
| Date | 1st December 1931 guessed | |
| POWER OUTPUT CTR UNIT CHINA R.M. 55 CAMSHAFT E.57177 (110.5°) C/R 5.74 STANDARD 1 5/8" LARGER R.R. CARBURETTER ① -------- COMPLETE EXHAUST SYSTEM 1'6" PIPES P1 SHORT ② ------ SILENCER SMALL FRONT EXPANSION BOX -- -- -- AS ABOVE BUT C.O. OPEN VALVE TIMING DIAGRAM: 1° 020 CLCE IN 49.8 Ex 33.7 Y-AXIS (LEFT): B.H.P. COMP. PR.{Percy H. Rose} LBS/SQ" 90, 80, 70, 60, 50, 40, 30, 20, 10 Y-AXIS (RIGHT): B.M.E.P. 110, 100, 90, 80, 70 X-AXIS: R.P.M. 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000 GRAPH TEXT: EARLY TIMING | ||