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).
Issues with diaphragm trouble, noise, pump placement, and the effects of diesel and alcohol fuels.
| Identifier | ExFiles\Box 149\4\ scan0063 | |
| Date | 27th October 1936 | |
| Rm.{William Robotham - Chief Engineer}1/AP.27.10.36. (1) Diaphragm trouble - continued. over as is thought most expedient. These pumps will begin to become available at the end of this week. There are so many cars involved that they cannot all be dealt with at once, for this reason we suggest leaving the Bentley for a short time, unless evidence recently available suggests that this is unwise. (2) Noise. This is an annoying fault but does not cause a break-down. We have a solution approved of by S.U.S. which will be incorporated on Production as soon as sufficient tests to prove reliability have been concluded. We anticipate that this may be in less than one month's time. Pump in the Frame. This disposes of the heat problem and greatly reduces the noise. Unfortunately it necessitates a new type of pump, which we have got to develop on our own. On our present type we have the experience of thousands of other cars to draw upon, when we fit the pump in the frame, this advantage disappears. Therefore while we are urging the experiments, we shall want a lot of experience before we change over. Diesel and Alcohol Fuels. These undoubtedly attack the diaphragms of most petrol pumps. There is no doubt that the G.3. zinc base fabric that we are recommending in this memo will be more susceptible to attack than the G.1. we are discarding, on the other hand it will be better than the standard American A.C. fabric. Under alcohol attack the petrol supply is unlikely to fail, leakage being the probable trouble. To observe the worst that can happen with disool and the new fabric we have fitted this combination to Lp{Mr Lappin}'s car which has so far completed 4000 miles without trouble. continued. | ||