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 illustrating engine degrees advance against RPM for light and full load operations.
| Identifier | ExFiles\Box 163\7\ img164 | |
| Date | 9th December 1930 guessed | |
| ENGINE DEGREES ADVANCE AUTOMATIC MANUAL O B R.P.M 500 1000 1500 2000 2500 3000 LIGHT LOAD OPERATION THIS EXTRA ADVANCE CAN BE SUPPLIED BY VACUUM CONTROL. FULL LOAD OPERATION THIS IS WHAT IS REQD WHEN THROTTLE IS WIDE OPEN AND CAN BE OBTAINED FROM CENTRIFUGAL ADVANCE. CUT IN OF CENTRIFUGAL ADVANCE ADVANCE REQUIRED WHEN ENGINE IS IDLING | ||