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).
Letter discussing the advantages and value of high octane fuels, comparing different octane number increases.
| Identifier | ExFiles\Box 89\1\ scan0170 | |
| Date | 13th November 1935 | |
| x261a Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KW. 13th November, 1935. R.{Sir Henry Royce} Summers Esq., Denna Hall, Burton Point, Chester. Dear Dick, Further to my last letter, here is a curve showing the advantage of high octane fuels. You will observe that an increase of octane number from 80 to 82 is about twice as valuable as an increase in octane number from 62 to 64. I feel that unless you watch the Ethyl development closely you will be out of date with your Benzol mixtures. Yours sincerely, | ||