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 to C.C. Wakefield & Co. Ltd. sending four samples of 'Castrolite' oil from a Bentley for analysis.
| Identifier | ExFiles\Box 145\2\ scan0192 | |
| Date | 23th November 1938 | |
| 1231, Experimental Dept. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/MH.{M. Huckerby} 23rd. November 1938. E.A.Evans, Esq., Messrs. C.C.Wakefield & Co. Ltd., Wakefield House, 30/32, Cheapside, LONDON, E.C.2. Dear Mr. Evans, We are sending you under separate cover, four samples of Wakefield's "Castrolite" oil used in a Bentley car which has just come back from a test on the Continent. A by-pass filter was used on the engine throughout the test, the element being changed immediately after Sample B. The mileages at which the samples were taken are:- A - 7,036 B - 12,383 C - 1,023 - after fitting a new cartridge. D - 4,868 - after fitting a new cartridge. We should be very grateful if you could let us know the percentage and nature of foreign matter in each of these samples. Would it also be possible to have microphotos of any metallic or siliceous matter found ? Kind regards, Yours sincerely, | ||