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 comparing the performance of 'General' and 'Fram' oil reconditioner filters.
| Identifier | ExFiles\Box 136\3\ scan0008 | |
| Date | 1st November 1938 | |
| 1139 To Rm.{William Robotham - Chief Engineer} from HPS{Horace Percy Smith - Experimental Factory Mgr}/W.Bell. c. to By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} OIL RECONDITIONER TESTS. "General" & "Fram" Filters. Tests were carried out on these two filters, further to those reported on 10.3.38. Each filter was tested under similar condition, 2 gallons of "dirty" Motorine "C" oil being circulated for 2 periods of 10 hours at 70°C and 30 lb./sq. in., specimens of the oil being taken every hour. "General" Filter. This filter proved very satisfactory, the delivery being good throughout the test, the oil also being well cleaned. At the end of the first 10 hours, the oil was approximately 70% cleaner, the delivery 102 pts./hr. remaining constant through-out the test. At the end of the second 10 hours, the same oil being used, it was approximately 90% cleaner, the delivery being 89 pts./hr. "Fram" Filter. After 6 hours of the first test, the oil was found to be very clean and its state remained like this until the end of the test, the delivery being constant throughout the test at 144 pts./hr. For the second 10 hours, a fresh supply of "dirty" oil was used, and although the rate of cleaning was slower, it was very good at the end of the test, the delivery being 109 pts./hr. Considering the tests as a whole, both reconditioners were very good, the "Fram" being considered the best that has so far been tried, giving good cleaning along with excellent delivery. The samples taken, are to be tested on an A.C. oil sediment meter, and spot photographs taken. This report will be issued later by Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Meanwhile, the tests are being continued, using fresh supplies of "dirty" oil at the end of each 10 hour period, until one of the reconditioners becomes clogged. R.M.L. HPS{Horace Percy Smith - Experimental Factory Mgr}/W. Bell. | ||