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 responding to a query about oil viscosity and the limitations of extrapolating data.
| Identifier | ExFiles\Box 145\1\ scan0062 | |
| Date | 2nd December 1933 | |
| SHELL-MEX X/1588. Telephone: Temple Bar 1234 Telegrams: Shelbeepee, Rand London 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}/Lid.{A. J. Lidsey}6/KT Our Department T.& R.{Sir Henry Royce} LGC/KCG Date 2nd December, 1933. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. LID{A. J. Lidsey} CONFIDENTIAL Dear Sirs, re OIL VISCOSITY In reply to your letter of the 25th ult., we regret that we are unable to give you figures on all the oils you mention, but have certain information which we send you herewith. It would, of course, be possible for us to extrapolate the information from the higher temperature viscosity ranges, but we are extremely distrustful of this method, as at the temperatures you mention all oils depart to a greater or lesser degree from the straight line on the logarithmic plot. We are quite willing to carry out tests on the other oils to get the information you require, but you will understand that this might, in certain circumstances, put us in rather a difficult position and such figures could only be given to you in strict confidence and without prejudice. Yours faithfully, for SHELL-MEX & B.P. LTD. L.G. Callingham K.c.f. Manager - Technical & Research Dept. All offers subject to acceptance by return of post unless otherwise stated Dictated but not signed by Mr. L.G.Callingham | ||