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).
Laboratory report on the properties of a compressor oil sample, including specific gravity, flash point, acidity, and viscosity tests.
| Identifier | ExFiles\Box 32\4\ Scan255 | |
| Date | 22th September 1926 | |
| COPY. X1588 Laboratory. H12/EA22.9.26. BY.{R.W. Bailey - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Re. sample of Compressor Oil submitted by Mr. Robotham 17.9.26. X235 The above sample of oil has been examined with the following results :- Specific gravity at 60°F ------ 0.894 Closed flash point ---------- 187°C Total acidity -------------- 0.1% Viscosity. Temperature at which test was made. Time of efflux in seconds. 55°F --- 810 80°F --- 340 100°F --- 183 The oil at four degrees below freezing point centigrade was found to be considerably thicker than at normal temperatures but still poured quite freely. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} has further requested us to make a curve of the Viscosity at varying temperatures. This will necessitate the obtaining of ice to perform further tests at lower temperatures but we hope to let you have a copy of the curve before the week-end. H1. | ||