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 octane number response of petrol when mixed with varying percentages of 90's benzol.
| Identifier | ExFiles\Box 150\1\ scan0064 | |
| Date | 1st October 1935 | |
| COPIES FOR FILING BENZOL RESPONSE CURVES Octane Number — C.F.R. Motor Method Y-Axis: 82, 81, ETHYL→80, 79, 78, 77, Previous ETHYL Standard→76, 75, 74, 73, 72, No 1 Grades / Benzol mixtures→71, 70, 69, No 3 Grades→68, 67, 66 X-Axis: Percent by Volume of 90's Benzol X-Axis Scale: 10%, 20%, 30%, 40%, 50%, 60% Curve 1: Benzol in a Current ETHYL Petrol Curve 2: Approximate Response in a 76 Octane ETHYL Petrol ETHYL EXPORT CORPORATION. October 1935 | ||