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 showing the variation of make-ratio with speed for a double breaker ignition distributor.
| Identifier | ExFiles\Box 163\7\ img233 | |
| Date | 14th March 1939 | |
| DELCO - REMY DOUBLE BREAKER IGNITION DISTRIBUTOR CURVE SHEWING VARIATION OF MAKE - RATIO WITH SPEED MAKER'S SETTING (.022") AT CONTACTS MAKE - RATIO DISTRIBUTOR SPEED (R.P.M.) Y-AXIS: 20, 30, 40, 50, 60, 70 X-AXIS: 800, 1600, 2400, 3200, 4000, 4800, 5600 SK. 8/4/3 14.3.39 | ||