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).
Results of tests on a shock absorber valve and ideas for further modifications.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan041 | |
| Date | 1st June 1931 | |
| ORIGINAL To Da.{Bernard Day - Chassis Design} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 5/K.T.1.6.31. 8235 With reference to Da{Bernard Day - Chassis Design}2/MM3.5.31. we have carried out the test which you suggest on a standard type of valve without a hole in it with the results attached. We shall repeat the test with a hole in the valve. You will note that in our note to R.{Sir Henry Royce} we have demonstrated that if we increase the rating of the valve spring, we get a very good result with the dash pot valve. Have you any scheme in view whereby we can alter the ratio of the up and down loads by merely changing the valve? A peculiarity, which is certainly contrary to what we expect, is that we appear to be able to get rid of the air in the damper quite satisfactorily if we vent the valve without venting past the pistons (though we may get a certain amount of venting with the existing piston clearances) which is possibly responsible for our good short stroke diagrams. In order that you may know the various tests that we have been doing, we send you a summary of the work on this shock absorber up to the present. Every test was checked by diagrams which you can have if you are interested. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Note. In all diagrams the masked valve refers to the valve with the small top clearance - i.e. acting as a dash pot. | ||