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 comparison chart of an 8 Litre Bentley and a 40/50 R.R.M. engine, showing valve timing and B.M.E.P.
| Identifier | ExFiles\Box 102\5\ scan0139 | |
| Date | 24th June 1932 guessed | |
| RMP57 COMPARISION OF 8 LITRE BENTLEY AND 40/50 R.R.M. 5-1 C/R OPEN EXHAUST. M.E.P.'S DIAGRAM 1 (LEFT): BENTLEY INLET 019 EX .004 Angles: 10, 12, 50, 45 INLET 235 EXHAUST 242 DIAGRAM 2 (MIDDLE): 114° W.W. SHAFT 28-7.5 O20 CLCE Angles: 52, 43 INLET 230 EXHAUST 236 DIAGRAM 3 (RIGHT): R ENGINE CAMS 110° SHAFT 17 18-G O20 CLCE Angles: 56, 53 INLET 256.5 EXHAUST 254 GRAPH: Y-Axis: B.M.E.P.'S (60, 70, 80, 90, 100, 110) X-Axis: R.P.M. (500, 1000, 1500, 2000, 2500, 3000, 3500) Graph Data: 40/50 VALVE AREA/LITRE 2.1 8 LITRE BENTLEY AREA/LITRE 2.0 INDUCTION SYSTEM 2 SU CARBURETTERS | ||