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).
Summary of tests performed on a petrol pump auxiliary tank.
| Identifier | ExFiles\Box 17\5\ Scan161 | |
| Date | 1st July 1932 | |
| 1.7.32. Lec. 2961 PETROL PUMP AUXILIARY TANK. SUMMARY OF TESTS. An auxiliary tank - details of which are illustrated in Hs.{Lord Ernest Hives - Chair}663 - was installed in the suction system, to retain a reserve petrol supply of approximately 1 pint, with a view to facilitating starting, when switching over to RESERVE, after running the MAIN supply dry. The following are the most important results obtained from a series of tests taken with this installation. Using a pump which gave an initial pumping time of 1 Min 43 secs at 20 P.R.P.M., and 45 secs at 50 P.R.P.M. with the suction pipe connected directly from the supply tank to the pump, it was found that, with the auxiliary tank full, the dashboard "D" on RESERVE, auxiliary tank tap "A" on MAIN & RESERVE, and with the pipes and filter empty, the initial pumping times were reduced to 38 secs at 20 P.R.P.M. and 23 secs at 50 P.R.P.M. When the whole system was dry however, the intial pumping time required was 15 Mins at 20 P.R.P.M. This test demonstrated the worst possible condition, and to, prevent this arising, a filler plug was provided on the tank. The following test was taken to cover a possible situation. The pump was run on MAIN for an hour at 750 P.R.P.M. and the MAIN pipe then run dry - by disconnecting from the tank. Tap "D" was then switched to RESERVE and "A" to MAIN & RESERVE while the pump was still running, and run for a further 30 mins - to allow the level in the auxiliary tank to settle. | ||