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 carburetter metering performance under light, throttled loads for various configurations.
| Identifier | ExFiles\Box 66a\1\ scan0042 | |
| Date | 17th February 1925 | |
| 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. VERTICAL AXIS: No OF NOTCHES ON CONTROL TO OBTAIN CORRECT MIXTURE NOTCHES RICH NOTCHES WEAK HORIZONTAL AXIS: R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} 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. STAMP: LIMITED TEST ROOM 17 FEB. 25 DERBY | ||