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 BMEP curves versus RPM for four different carburettor and camshaft configurations, all tested with open exhaust.
| Identifier | ExFiles\Box 92\2\ scan0125 | |
| Date | 3rd June 1931 | |
| CURVE (3A) PII BMEP CURVES. ALL TAKEN OPEN EXHAUST. (A) R.R.C.H. EAGLE IX CARB. (4.9:1 COMP RATIO)(R.TYPE 110° CAMSHAFT) (B) TWIN CARBS 1.4 CHOKES ( " " )( " " ) (C) TWIN CARBS 1.3 CHOKES (4.6:1 STD. COMP RATIO)(STANDARD CAMSHAFT) (D) STANDARD CARB. ( " " )( " " ) B.M.E.P. 120 110 100 90 80 70 60 R.P.M. 500 1000 1500 2000 2500 3000 3500 A.{Mr Adams} B. C. D.{John DeLooze - Company Secretary} L.W.S 3-6-31 | ||