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 air/fuel ratio distribution versus engine RPM for a 25/30 HP engine.
| Identifier | ExFiles\Box 103\4\ scan0145 | |
| Date | 1st July 1931 | |
| 25/30 HP DISTRIBUTION CURVE N.1 INDUCTION PIPE Ex 2/111 STROMBERG. DA{Bernard Day - Chassis Design} 42. CARBURETTER FULL THROTTLE HALF THROTTLE AIR/FUEL RATIO 15 14 13 12 11 FRONT CYLINDERS CENTRE REAR CAMBRIDGE EXHAUST GAS ANALYSER RPM (ENGINE) 500 1000 1500 2000 2500 3000 3500 4000 C/731 | ||