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).
Oil pump test comparing a B.W.P. device with a conventional suction assembly, including procedures for taking multiple oil samples.
| Identifier | ExFiles\Box 135\3\ scan0079 | |
| Date | 25th October 1934 guessed | |
| 5. 250 C. C. water was also added before starting pump. The pump speed on this test was approximately 500 RPM, representing then an approximate engine speed of 1000 RPM which is representative of engine test initial speed. As stated above the sediment described was sifted into the oil over a period 1/2 hours time while the pump was in operation. After an additional ten minutes of operation, making a total of 40 minutes from the time of starting, samples of oil were taken from the delivery line leading from the pump. Both the sample which was drawn for the purpose of obtaining a sediment and water analysis and the test tube which was obtained as a visible record of the quality of the oil are known as samples 1-B. The B.W.P. device was then removed and the conventional type of suction bell and screen assembly installed in its place. This operation requiring a period of 2-1/2 minutes. Samples for analysis and permanent record were then drawn from the delivery lines with the pump in operation. These samples are designated as 2.B. The test equipment was then allowed to stay idle for a period of 15 hours, representing a shut-down over night of the test department, after which time a sample of oil was drawn from the suction level nominally developed with the B.W.P. device installed at full sump level, with the pump inoperative, and being designated as 3-B. The object of this sample being to disclose the quality of the oil which would be drawn off and forced to the bearings with the B.W.P. device in operation after the initial start-up of the engine. The pump was then started and operated for a period of 1/2 hour, at the end of which time further bottles and test tubes were taken from the oil delivery line. These samples being known as 4-B. The B.W.P. device was then removed and the conventional suction bell and screen assembly then installed and samples again taken from the | ||