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 from Ethyl Export Corporation concerning fuel octane ratings and Benzene equivalents.
| Identifier | ExFiles\Box 27a\4\ Scan012 | |
| Date | 23th September 1932 | |
| CABLEGRAMS: ETHYLPORT, LONDON. TELEGRAMS: ETHYLPORT, CHURTON. ETHYL EXPORT CORPORATION Incorporated in the State of Delaware, U.S.A. with limited liability. ABFORD HOUSE, VICTORIA LONDON, S.W.1 Telephone: VICTORIA 5520 Head Office: 135 EAST 42ND STREET NEW YORK, U.S.A 23rd September, 1932. E.{Mr Elliott - Chief Engineer} W. Hives, Esq., Rolls-Royce Ltd., DERBY. Handwritten: YNG Dear Hs.{Lord Ernest Hives - Chair}, Very many thanks for yours of the 22nd. With reference to your query concerning the Benzene equivalent used by the A.I.D. at Kidbrooke, you may take it as a rough estimate that approximately 3% of Benzene equals 1 octane number when the fuel is around 75 to 76 octane and the tests are conducted at 100°C jacket temperature (i.e. under the same conditions as the present Ministry tests). In other words, your sample would appear to be between two and three octane numbers down on the reference fuel.. Taking the reference fuel at the equivalent of about 76 octane, one would estimate the sample to be about 73 - 73.5 octane. Kindest regards, Yours sincerely, F.R.Banks. Handwritten: PG Please return HS{Lord Ernest Hives - Chair} noted many thanks R.J. WNT/FRB Stamp: RECEIVED 24 SEP 1932 Stamp: RECEIVED 26 SEP 1932 | ||