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 results from Test No. 4, plotting air/fuel ratio distribution for a standard open carburetter across different cylinder pairs.
| Identifier | ExFiles\Box 155\2\ scan0030 | |
| Date | 7th January 1937 guessed | |
| 25/30 DISTRIBUTION S.17. TEST N°4 STANDARD CARBURRETTER OPEN (NO BEND OR SILENCER) AIR/FUEL RATIO 15 14 13 12 11 CYLS 1&2 CYLS 5&6 CYLS 3&4 500 1000 1500 2000 2500 3000 3500 4000 C.T.S. | ||