Design of a hydraulic shock damper control system.
| Identifier | ExFiles\Box 56\1\ Scan199 | |
| Date | 4th April 1932 | |
| DA {Bernard Day - Chassis Design} /HDY. {William Hardy} HS. {Lord Ernest Hives - Chair} ) FROM R. {Sir Henry Royce} E. {Mr Elliott - Chief Engineer} BY. {R.W. Bailey - Chief Engineer} ) (At Le Canadel(Henry Royce's French residence).) X235. R1/M31.3.32. Sent from WW. 4.4.32. C. to SG. {Arthur F. Sidgreaves - MD} WOR. {Arthur Wormald - General Works Manager} SHOCK DAMPER CONTROL: X.235 HYDRAULIC. I regret that I have not written more precisely to Mr. Hardy about this. I hope the single valve (double way) type has now been made quite satisfactory as an uncontrolled type, and that the addition of an hydraulic cylinder or sylphon to alter the loading on the valve is a comparatively simple matter if we had a controllable source of oil pressure. A single line of control pipes ( of .125 to .0625) could go along one side of the chassis, and after being connected to the shock dampers on this side could cross over via the nearest cross member to the one on the other side. This will make less length of tubing than one pipe down each side: R.H. front damper. R.H. rear damper. Control pump. L.H. front damper. L.H. rear damper. The control pump should be made from the simplest patterns possible (rough mill-wright type) of simple form, without elaborate boses, corners, and complex shapes, because they are only experimental and can be finished off at leisure as the Works wish. My form is a rectangular box with 3 lugs for 2-BA. bolts and a round hole top and bottom, ground or milled flat faces, and 2-BA. studs or bolts used throughout, so one size only of small tapping. The pumping valves are arranged so that no springs are needed, gravity seated, and the oil only goes through the filter when filling while not pumping. The filler is on the face of the box so that a stick or wire can gauge the level of the oil, because the filler is the full depth of the box. A simple piece of gauze so as to form a passage from t and back. Three bolts as shewn are preferable to hold the box to the dash: two might result in slight vibration noises. (1) | ||
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).