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 Shell-Mex and B.P. Ltd regarding lubricating oil and methods for correlating anti-knock test results with on-road engine temperature readings.
| Identifier | ExFiles\Box 145\3\ scan0219 | |
| Date | 4th May 1934 | |
| X524 SHELL-MEX & BP LTD Telephone: Temple Bar 1234 Telegrams: Shelbeepee, Rand, London, Telex SHELL-MEX AND B.P. LTD Distributors for the Shell and Anglo-Persian Oil Groups P.O. BOX NO. 148 . SHELL-MEX HOUSE VICTORIA EMBANKMENT . LONDON . W.C.2 Your Reference...... Hs.{Lord Ernest Hives - Chair}4/MJ. Our Department.... T. & R.{Sir Henry Royce} LGC/EMM. Date 4th May, 1934. E.{Mr Elliott - Chief Engineer} W. Hives Esq., Messrs. Rolls-Royce Ltd., DERBY. Dear Mr. Hives, Thank you for your letter of May 3rd. - I have passed the information on with regard to stocking of lubricating oil to our Motor Oils Department and they are approaching Mr. Sidgreaves as you suggest. The mixture temperatures we have been taking are in connection with our work in correlating the anti-knock test methods used with C.F.R. engines with road results and I attach the readings from several cars. We use an iron-Eureka type thermo-couple with milli-voltmeter - fixing the couple into the induction manifold in such a way as to be in the gas stream close to an inlet valve port. We take particular care to insulate the thermo-couple so that we are actually measuring the gas temperature and not that of the wall of the inlet pipe. When bonnet air temperatures are measured, we use a similar instrument and attach it to any convenient part, such as a bonnet stay. It is interesting to note how temperatures go up when idling and we think this is due to the very much smaller quantity of gas passing. All offers subject to acceptance by return of post unless otherwise stated. | ||