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 air/fuel ratio versus engine RPM for a 25/30 HP engine with a Stromberg DA 42 carburettor at full and half throttle.
| Identifier | ExFiles\Box 20\9\ Scan094 | |
| Date | 22th January 1936 guessed | |
| 25/30 HP DISTRIBUTION CURVE N°1 INDUCTION PIPE Ex 2/III. STROMBERG. DA{Bernard Day - Chassis Design} 42. CARBURRETTER AIR FUEL RATIO 15 14 13 12 11 FULL THROTTLE HALF THROTTLE FRONT CYLINDERS CENTRE REAR CAMBRIDGE EXHAUST GAS ANALYSER RPM (ENGINE) 500 1000 1500 2000 2500 3000 3500 4000 KTS | ||