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).
Test report on the relative temperatures of oil at various depths in the sump under actual road conditions.
| Identifier | ExFiles\Box 135\3\ scan0091 | |
| Date | 18th August 1929 guessed | |
| 17. TEST NO 5. RELATIVE TEMPERATURES OF OIL AT VARIOUS DEPTHS IN THE SUMP UNDER ACTUAL ROAD CONDITIONS. It is naturally expected that various engineers will desire information pertaining to the oil temperatures of that lubricant which is drawn off and forced to the bearings with the E.W.P. device in operation as compared to that lubricant which is circulated in the conventional manner. This is but natural in as much as the source of the heat for oil is from the top, while the cooling tendency is from the bottom. It is logical to assume that the oil temperature, at the surface would be somewhat warmer than that next to the bottom of the sump. To determine just what this differential was, the following test was carried out: A Chevrolet 6, 1929 Coach was driven over a stretch of pavement for a distance of 40 miles, or for sufficient length of time for the temperature at the bottom of the sump to become stabilized, the following is the result of that test. | ||