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 the Vacuum Oil Company regarding the testing of two extreme pressure lubricant samples.
| Identifier | ExFiles\Box 145\1\ scan0221 | |
| Date | 12th August 1937 | |
| 1229 Rm{William Robotham - Chief Engineer}/Gryl/R.{Sir Henry Royce} 12th August, 1937. O.T. Jones, Esq., Vacuum Oil Company Limited, Caxton House, Westminster, S.W.1. Dear Mr. Jones, Many thanks for your letter of August 4th saying you would run off a test on your Cornell machine of an extreme pressure lubricant. We are sending two samples marked 'A' and 'B', the latter having been maintained at a high temperature for a considerable length of time. We should like, if possible, to have your views on the load carrying capacities of these oils at temperatures of 90 and 130°C as compared with Vacuum Hypoid gear lubricant. Yours sincerely, | ||