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).
Use of smaller control bellows for front dampers to reduce front end damping.
| Identifier | ExFiles\Box 151\2\ scan0131 | |
| Date | 3rd January 1934 | |
| X4698 KES To BY. {R.W. Bailey - Chief Engineer} from HDY. {William Hardy} HDY. {William Hardy} 1/HP.3.1.34. c. Wer. E. {Mr Elliott - Chief Engineer} Hs. {Lord Ernest Hives - Chair} Da. {Bernard Day - Chassis Design} Smaller Control Bellows for Front Dampers. In order to reduce the front end damping, smaller bellows are to be used in the front dampers, as shown by W. Sch.3935 herewith. According to the Packless Gland Co's figures for extension of their bellows, the size that is proposed should give an extension per inch of .187 and the size that is now used, No.8. should give .222, a ratio of .84. Making allowance for a slight reduction of length, the ratio becomes .76, so that there appears to be a considerable margin of deflection over the ratio of .5 which, we think, is all that will be required. The clearance for valve lift is intended to be the same as before. As the maximum oil pressure is less than before, the lift at maximum pressure will be more, but as there is no alteration to the lowest pressure the maximum lift is unchanged. HDY. {William Hardy} | ||