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).
Development and testing of a double valve for hydraulic shock absorbers.
| Identifier | Morton\M19\ img079 | |
| Date | 1st June 1931 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. to Ey. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}4/RT.1.6.31. 8235. HYDRAULIC SHOCK ABSORBERS. We have now reached a stage in the development of the double valve where we can say that it functions as well in both directions as the two single valves. We have, of course, only been able to test it out on the two piston vertical damper. Increasing the rating of the valve spring, which was very low originally, removed the last tendency for the valve to flutter. We still have to use the guide of the valve to give us a dash pot effect, but we can see no disadvantage in this arrangement. Perhaps you will say if you would like us to make other tests with a view to an alternative solution. As far as we have gone the valve certainly seems quieter in operation than our existing standard, though we do not suffer from noisy valves in service. We have not tried the damper on the road as yet. We cannot easily vary the ratio between high pressure and low pressure loads, but you doubtlessly have a scheme in mind whereby we can get any required ratio by changing the valve. In any event having once established the standard load it is only in cases of complaint that we depart from our fixed setting. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} See 8235 for other print, | ||