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 comparing carburettor mixture settings against engine RPM for various E.A.C. carburettor configurations under light load.
| Identifier | ExFiles\Box 66a\1\ scan0024 | |
| Date | 15th January 1925 guessed | |
| No 2. CARBURETTERS E.A.C. METERING UNDER LIGHT LOADS, THROTTLED BRAKE SET AT 2000 R.P.M. FULL LOAD. FOR EACH THROTTLE POSITION MIXTURE CONTROL IS ADJUSTED TO GIVE MAX. R.P.M. OF ENGINE. NOTE:- CURVES ABOVE THE ZERO LINE INDICATE A RICH MIXTURE AND CURVES BELOW THE LINE INDICATE WEAK MIXTURE. AXIS LABELS: Y-AXIS: Nº OF NOTCHES ON CONTROL TO OBTAIN CORRECT MIXTURE Above 0 line: NOTCHES WEAK 0 line: CORRECT MIXTURE Below 0 line: NOTCHES RICH X-AXIS: R.P.M. GRAPH ANNOTATIONS: AIR VALVE STARTS TO LIFT ON STD E.A.C & EXPL. E.A.C. STD. 40/50 CARB. AIR PORTS OPEN 40/50 & EXPL. E.A.C. EXPERIMENTAL E.A.C. 40/50 AIR VALVE STARTS TO LIFT STD. E.A.C WITH 8 COIL SPG. RATING 38 oz/IN. EXCESSIVE WEAK SPOT ON STD. E.A.C. CARBURETTER. AIR PORTS OPEN STD. E.A.C. | ||