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 the governor advance curve for a distributor, showing degrees of advance against distributor RPM.
| Identifier | ExFiles\Box 168\3\ img094 | |
| Date | 4th February 1938 | |
| GOVERNOR ADVANCE CURVE OF ROLLS-ROYCE DISTRIBUTOR TO DRG 426 (Nº7) LIMITS TO RM{William Robotham - Chief Engineer}/SNDL 4-2-38 FOR B.T. UNITS. 1st SPRING AS DRG. 2nd SPRING 34 COILS 16 SWG (.064") FREE ANGLE 143° LENGTH .375 LOAD 2 LB. 2.825 INSIDE DIA. .296 MEAN DIA. .360" DEGREES ADVANCE. DISTRIBUTOR SPEED R.P.M. LIMIT SJ/4-2-38/F.3 | ||