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).
Loss of damping in shock dampers at high frequency oscillation.
| Identifier | ExFiles\Box 151\2\ scan0132 | |
| Date | 1st January 1934 | |
| To Hs. {Lord Ernest Hives - Chair} from HDY. {William Hardy} c. Sg. {Arthur F. Sidgreaves - MD} Wor. {Arthur Wormald - General Works Manager} E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} By. {R.W. Bailey - Chief Engineer} HDY. {William Hardy} 4/HP.1.1.34. Shock Dampers. With reference to the remark in Hs {Lord Ernest Hives - Chair} /Les.10/KW.29.12.33 about loss of damping at high frequency oscillation, if this is the same trouble as can be demonstrated manually on the test rig, and is, as has been suggested by Hs {Lord Ernest Hives - Chair} /Les, due to overfilling of the damper by reason of the displacement of the valve, we think that some information may be gained about this by connecting pressure gauges to both ends of the damper. If the explanation is the correct one, we think that it will be found that at the moment the damper is ineffective, there will be a high pressure shown on both gauges. HDY. {William Hardy} | ||