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).
Petrol pump tests focusing on the reduction of filter volume and the use of smaller diameter pipe lines.
| Identifier | ExFiles\Box 17\5\ Scan146 | |
| Date | 30th June 1932 guessed | |
| LEI. 2961 PETROL PUMP TESTS. REDUCTION OF FILTER VOLUME AND SMALLER DIAMETER PIPE LINE. The capacity of the filter used throughout the previous tests was found to be 60 cc's, and by filling up as much space as possible, this was eventually reduced to 14 cc's. The pump was set so that the fabrics gave the minimum clearance volume, and in or-der to avoid complications, this setting was not disturbed throughout the following tests. As a basis for comparison, tests were first taken with a 5/16" (standard) diam pipe 12' 6" long, and 3 way dashboard tap and 60 cc filter in the suction system, and the other results computed as percentages of the figures, which were :- Initial Pumping time (I.P.T.) at 20 R.P.M. = 173 secs, and delivery at 1750 R.P.M. = 133 pts/Hr. 5/16" DIAM PIPE. The results showed that with the 5/16" diam pipe directly connected to the pump, the I.P.T., was reduced by 47%, the delivery at 1750 R.P.M., remaining practically unchanged. With the 14 cc filter added the I.P.T was reduced by 8%, and the delivery was unaltered. This seems to indicate that 20% of the I.P.T. was taken up by the extra large filter, capacity and a further 27% by the restiction of the filter elements. ¼" DIAM PIPE. With a ¼" diam pipe directly connected to the pump a reduction in I.P.T., of 85% was obtained without affecting the top delivery. Whilst with the 14 cc filter attached the I.P.T. reduction measured 34%, and still the same delivery at 1750 R.P.M. was obtained. | ||