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 H.M. Hobson, Ltd. discussing the specific gravity and colour change of a fluid sample from an experimental car.
| Identifier | ExFiles\Box 61\3\ scan0198 | |
| Date | 3rd June 1931 | |
| X4038 CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: SHEPHERDS BUSH 3321. (4 LINES) TELEGRAMS: "ASSEMBLAGE, LONDON." H.M. HOBSON, LTD. (ESTABLISHED 1903) MANUFACTURERS OF Hobson Motor Accessories. Claudel-Hobson Carburetters. Hobson-Perfect Window Regulators. Hobson K-S Petrol Telegages. Hobson Sparking Plugs. WORKS: - LONDON AND WOLVERHAMPTON. 47-55, THE VALE, ACTON, LONDON, W. 3. 3rd June 1931. OUR REF. TPS/MW YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}8/KT. Messrs. Rolls-Royce, Ltd., Expl. Dept. Derby. For the attention of W.A. Robotham, Esq., Dear Sirs, We beg to thank you for your letter of the 1st inst., and we have duly received the further sample of liquid taken from one of your experimental cars. This is showing a darker colour than the new liquid, which is apparently the effect of daylight on it. We have checked the specific gravity of the fluid taken out of the production gauges, and find that it only varies from the standard by 1%. We think therefore that there is no chance of its having been in any way contaminated by petrol vapour, as the appearance of the liquid originally led us to think, as the specific gravity would have been more greatly affected. We are hopeful that in the course of a few days | ||