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).
Querying discrepancies in diagrams related to hydraulic shock dampers and pressure theories.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan011 | |
| Date | 13th July 1928 | |
| HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} ORIGINAL DAL/M13.7.28. HYDRAULIC SHOCK DAMPERS. X235 With reference to HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}2/LG9728., it may be that we do not properly understand the diagrams, but there appears to us to be some discrepancies which should be explained: (1) In figs. 7 & 8 for instance we cannot understand why the difference in pressure required to open the low pressure valve should not be the full spring force. (2) If the expansion theory is correct, and a positive pressure is trapped in the high pressure end when the valve shuts, we do not understand why this pressure is not superimposed on the low pressure when the latter valve opens. (3) Also, if the expansion theory is true we do not see why there should not be a similar hump at the low pressure end. If it is contended that the low pressure end is vented, it appears to us that when the low pressure valve opens the vent acts even better on the high pressure side because it is working under the full low pressure, whereas on the high pressure stroke the vent is only under atmosphere. The emulsion theory seems quite reasonable except for the above discrepancies. It leads us to wonder whether the diagrams as shewn are entirely accurate, and whether further diagrams might not confirm the theory by shewing that the above discrepancies do not really exist. DA.{Bernard Day - Chassis Design} | ||