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).
Modifications and tests on a sylphon tube and valve to improve damper performance.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan005 | |
| Date | 12th May 1931 | |
| - 2 - Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/KT.12.5.31.cont'd bore and the internal bore of the sylphon tube to .010" and endeavoured to make it act as a dash pot and this was sufficiently successful to enable us to get the diagrams shown in 11 and 12, with the small hole in the valve. There was still rather more bounce than we liked towards the closing of the valve on the high pressure stroke and we therefore lightened the valve as far as possible to see what effect this would have. The improvement was appreciable as shown in figure 13. We took some diagrams of the damper under these conditions operating over small strokes under high frequency with results shown in figures 15, and 16, which on the whole can be considered very satisfactory, being better diagrams than any of our existing dampers. Naturally these are only preliminary results and we are continuing our investigations with various alterations to the valves. We think that the small amplitude high frequency diagrams are very good, but we would like to get the large amplitude low frequency diagrams to build up their pressure progressively but less rapidly. Diagrams attached to R.{Sir Henry Royce} Da{Bernard Day - Chassis Design} & E's copy. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||