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).
Diagrams showing the progressive falling off in rear damper efficiency with the reduction of stroke.
| Identifier | ExFiles\Box 55\4\ Scan418 | |
| Date | 2nd December 1930 guessed | |
| FIG.1. P.II REAR DAMPER LOADS 80/85. OVAL LEVER USED. DIAGRAMS SHOW PROGRESSIVE FALLING OFF IN DAMPER EFFICIENCY WITH REDUCTION OF STROKE. LOW PRESSURE DIAGRAMS HIGH PRESSURE DIAGRAMS Graph Data: Vertical Axis Label: 154 LBS / D" Top Left Graph (A): EFFECTIVE MEAN BALL PIN LOAD 72 LBS. 70 R.P.M. 5" STROKE. TEMP 20°C. Top Right Graph (A): EFFECTIVE MEAN BALL PIN LOAD 77.5 LBS. 70 R.P.M. 5" STROKE 20°C. Second Row Left Graph (A): EFFECTIVE MEAN BALL PIN LOAD 68 LBS. 70 R.P.M. 4" STROKE. 20°C. Second Row Right Graph (B): EFFECTIVE MEAN BALL PIN LOAD 72 LBS. 70 R.P.M. 4" STROKE 24°C. Third Row Left Graph (B): EFFECTIVE MEAN BALL LOAD. 56 LBS. 130 R.P.M. 2.5" STROKE. 20°C. Third Row Right Graph (B): EFFECTIVE MEAN BALL LOAD 60 LBS. 130 R.P.M. 2.5" STROKE 25°C. Bottom Left Graph (C): EFFECTIVE MEAN BALL LOAD 36.5 LBS. 450 RPM. 1" STROKE. 25°C. Bottom Right Graph (C): EFFECTIVE MEAN BALL LOAD 37 LBS. 450 R.P.M. 1" STROKE 25°C. DIAGRAMS "A" REPRESENT DAMPERS CHECKING NATURAL SPRING PERIODICITY AFTER HUMPED BACKED BRIDGES. DIAGRAMS "B" CHECKING PITCHING PERIODICITY. LOST DAMPING SHOWN. DIAGRAMS "C" CHECKING AXLE BOUNCE, i.e. ROAD HOLDING CONDITION. THREE TYPES OF AXLE MOVEMENT MEASURED BY ACTUAL ROAD TEST. HS{Lord Ernest Hives - Chair}/RM.{William Robotham - Chief Engineer} | ||