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 discussing the effect of mixture temperature on fuel octane number.
| Identifier | ExFiles\Box 27a\4\ Scan155 | |
| Date | 13th July 1933 | |
| CABLEGRAMS: ETHYLPORT, LONDON. TELEGRAMS: ETHYLPORT, CHURTON 81-87. ETHYL EXPORT CORPORATION Incorporated in the State of Delaware, U.S.A. with limited liability. ABFORD HOUSE, VICTORIA LONDON, S.W.I Telephone: VICTORIA 5520 Head Office: 135 EAST 42ND STREET NEW YORK, U.S.A 13th July, 1933. A.{Mr Adams} C. Lovesey, Esq., Experimental Department, Rolls Royce Ltd., Nightingale Road, DERBY. Dear Lovesey, With reference to our conversation yesterday and the question of the effect of mixture temperature on Octane number. I have a curve, which I give below, and which may be of some interest to you, although it will only concern the particular engine (C.F.R.) on which the tests were carried out. The fuel is a "leaded" one and does not contain added aromatics, therefore the drop in value will not be so great as one which contains a reasonably high proportion of added aromatics. The fuel (B2) is a sub-standard reference fuel which is used in place of pure Octane and Heptane for carrying out routine tests. It is a "straight run" petrol to which "lead" or benzene is added in order to obtain a given Octane value. C.F.R. ENGINE running at 900 r.p.m. with jacket temp. of 212°F.{Mr Friese} Fuel Mixture Tempt. °F Octane No. B2 + 2 ccs. of TEL per gal. 100 79.4 " 200 78.0 " 250 76.6 " 300 75.4 I had a talk with Wood to-day and I understood that you had already spoken to him. It appears that they wish to carry out immediate type tests on the 76/78 Octane fuel, but apparently he agrees to development on the 87 Octane fuel. I will try and come up next week, but will give you notice before I arrive. Kindest regards, Yours sincerely, Rod Banks. | ||