Progressive development of hydraulic shock dampers, favouring a restricted vent design.
| Identifier | WestWitteringFiles\O\April1926-June1926\ Scan47 | |
| Date | 22th April 1926 | |
| DA. {Bernard Day - Chassis Design} ) TO HS. {Lord Ernest Hives - Chair} ) FROM R. {Sir Henry Royce} BY. {R.W. Bailey - Chief Engineer} ) (Le Canadel(Henry Royce's French residence)..) ORIGINAL R4/M22.4.26. Rec'd at WW. evening of 26.4.26. RR. HYDRAULIC SHOCK DAMPERS - X235 PROGRESSIVE DEVELOPMENT. I am rather inclined to favour restricted vent on both sides with back pressure valve, because then:- (1) No fear of locked air anywhere. (2) Permits double valve in piston concentric (simple body etc.) (3) Car continually righting itself from either side of normal - i.e. not wanting for maximum force to overcome valve. (4) Passages for the above so small as not to effect rapid damping even with thin oil. R. {Sir Henry Royce} | ||
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).