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 loads and throttled conditions for various setups.
| Identifier | ExFiles\Box 66a\1\ scan0023 | |
| 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. NO. OF NOTCHES ON CONTROL TO OBTAIN CORRECT MIXTURE NOTCHES WEAK NOTCHES RICH R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} 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. AIR PORTS OPEN STD E.A.C. EXCESSIVE WEAK SPOT ON STD E.A.C CARBURETTER. | ||