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).
Letter discussing fuel feed systems, including vacuum pumps and boosters.
| Identifier | ExFiles\Box 40\3\ Scan095 | |
| Date | 5th February 1929 | |
| C O P Y February 5th, 1929. Mr. R.W.H. Bailey, Rolls Royce Ltd., Derby, England. Dear Mr. Bailey: FUEL FEED - SECTION 7140 Thank you for yours of January 22nd (By4). Vacuum Pump. Does it not seem as though the outlet of the vacuum pump should be connected to the intake manifold, so that when there was sufficiently vacuum the engine would do its own feeding and when there was insufficient vacuum the pump would work? This would dispose of the problem of the waste of fuel vapor from the vacuum pump, and the disposal of this explosive vapor. When the engine was sucking both valves in the pump would be sucked open. Boosters. We have been playing with "boosters" and attached report from Sheridan (our West Coast Service Manager) shows that the results are good under their extremely severe conditions. Attached chart SK-284 shows what two types of booster do, and attached drawing P-60809 shows a late type of Stewart Warner booster. We like these boosters because - (1) They add nothing to the mechanism of the car. (2) They avoid most of the "loading up" of the engine during the filling period of the vacuum tank. -continued- | ||