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).
Graph showing the effect of drilled valves on rear axle movement over a hump-backed bridge.
| Identifier | ExFiles\Box 182\M19\ img158 | |
| Date | 21th April 1931 guessed | |
| R.R. HYDRAULIC DAMPERS. EFFECT OF DRILLED VALVES ON REAR AXLE MOVEMENT. ETWALL HUMP BACKED BRIDGE NORMAL BUFFER CLEARANCE. 25EX CAR. LOW RATING ROAD SPRINGS. DAMPER LOADS 90/90 LBS. H.P. VALVE DRILLED .055 DIA. STANDARD PLAIN VALVES. ROAD SPEED (M.P.H.) NORMAL AXLE POSITION. COMPRESSION REBOUND MAXIMUM REAR AXLE MOVEMENT. | ||