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 Benzol Response Curves showing the relationship between Octane Number and the percentage of Benzol.
| Identifier | ExFiles\Box 150\1\ scan0063 | |
| Date | 1st October 1935 | |
| BENZOL RESPONSE CURVES Y-AXIS: Octane Number - C.F.R. Motor Method X-AXIS: Percent by Volume of 90's Benzol CURVE LABELS: - Benzol in a current ETHYL Petrol - Approximate Response in a 76 Octane ETHYL Petrol - Benzol Mixtures ANNOTATIONS: - ETHYL -> [Struck out: ENGLISH STANDARD] - Previous ETHYL Standard -> [Struck out: PRESENT PRODUCT STANDARD] - No 1 Grades - No 3 Grades LEFT MARGIN TEXT: VERY APPROX COMPRESSION RATIOS PERMISSIBLE ON BENTLEY FOR EQUAL FREEDOM FROM DETONATION ON GIVEN FUEL OCTANE NUMBER 77 83-1 6-7 5.2-1 BOTTOM RIGHT: ETHYL EXPORT CORPORATION. October 1935 | ||