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).
Series of diagrams showing the progressive falling off in rear damper efficiency with reduction of stroke.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan006 | |
| Date | 4th 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 A 154 LBS / D" EFFECTIVE MEAN BALL PIN LOAD 72 LBS. 70 R.P.M. 5" STROKE TEMP 20°C A 154 LBS / D" EFFECTIVE MEAN BALL PIN LOAD 77.5 LBS. 70 R.P.M. 5" STROKE 20°C A 154 LBS / D" EFFECTIVE MEAN BALL PIN LOAD 68 LBS. 70 R.P.M. 4" STROKE. 20°C. A 154 LBS / D" EFFECTIVE MEAN BALL PIN LOAD 72 LBS. 70 R.P.M. 4" STROKE 24°C B B 154 LBS / D" EFFECTIVE MEAN BALL LOAD. 56 LBS. 130 R.P.M. 2.5" STROKE 20°C. 154 LBS / D" EFFECTIVE MEAN BALL LOAD 60 LBS. 130 R.P.M. 2.5" STROKE 25°C. C. C. 154 LBS / D" EFFECTIVE MEAN BALL LOAD 36.5 LBS. 450 R.P.M. 1" STROKE. 25°C. 154 LBS / D" EFFECTIVE MEAN BALL LOAD 37 LBS. 430 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} | ||