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, plotting Octane Number against the percentage by volume of Benzol.
| Identifier | ExFiles\Box 130\1\ scan0275 | |
| Date | 1st October 1935 | |
| BENZOL RESPONSE CURVES VERY APPROX. COMPRESSION RATIOS PERMISSIBLE ON BENTLEY FOR EQUAL FREEDOM FROM DETONATION ON GIVEN FUEL OCTANE NUMBER OCTANE NUMBER C.F.R. MOTOR METHOD 7-1 ETHYL+80 ENGLISH STANDARD 6 1/2-1 PREVIOUS ETHYL STANDARD PRESENT FRENCH STANDARD 6-1 5 3/4-1 Nº 1 GRADES 'BENZOL MIXTURES' Nº 3 GRADES BENZOL IN A CURRENT ETHYL PETROL APPROXIMATE RESPONSE IN A 76 OCTANE ETHYL PETROL PERCENT BY VOLUME OF 90'S BENZOL 10% 20% 30% 40% 50% 60% ETHYL EXPORT CORPORATION OCTOBER 1935. | ||