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).
Test results and further experiments on a damper governor control system.
| Identifier | ExFiles\Box 179b\3\ img001 | |
| Date | 2nd January 1933 | |
| To Hdy.{William Hardy} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT.2.1.33. DAMPER GOVERNOR CONTROL. Further to our Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT.23.12.32. We have taken the figures with the Lockheed Fluid with the attached results. These shew that, between the governor and damper at any rate, the low viscosity fluid is a very material improvement. We further attach a curve which we think gives us more the desired characteristic variation in ball pin load, obtained by using a lower rating valve spring with the diaphragm. We find that in order to get the required softness in low speed ride, we have to allow about .070" movement before it starts compressing the spring. While we have no definite evidence that this causes trouble, it is not altogether a satisfactory state of affairs, and we are therefore commencing experiments with the larger valve. We are not too optimistic as to the results, however, as we appreciate that it has already been established that a big lift is required to ensure silence, the long taper seat being incorporated for this purpose. We are now going to make some tests to see if increasing the pump delivery will cut down the lag between governor and damper; we believe at present that it will, and consider that we must make every effort to obtain instantaneous response from the automatic control. Having once appreciated complete absence of delay, as on the hand control, we want to reproduce it. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||