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 comparing mean effective and maximum pressures for standard dampers and velocity pressure dampers at varying strokes.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan031 | |
| Date | 18th June 1928 | |
| Top left graph: 200 CYCLES / MIN MEAN EFFECTIVE PRESSURES CONSTANT SPEED VARYING STROKE HIGH PRESSURE VELOCITY DAMPER LOW PRESSURE VELOCITY DAMPER HIGH PRESSURE STANDARD DAMPER LOW PRESSURE STANDARD DAMPER STROKE Ins 13.5' LEVER Top right graph: 200 CYCLES / MIN MAXIMUM PRESSURES CONSTANT SPEED VARYING STROKE HIGH PRESSURE VELOCITY DAMPER LOW PRESSURE VELOCITY DAMPER HIGH PRESSURE STANDARD DAMPER LOW PRESSURE STANDARD DAMPER STROKE Ins 13.5' LEVER Bottom title: COMPARISON OF STANDARD DAMPER AND VELOCITY PRESSURE DAMPER WITH STAGGERED ORIFICES. MAX. AND MEAN EFF PRS COMPARED VARYING STROKE Stamp: ROYCE, LIMITED PRINT ROOM, 18 JUN 1928 DERBY. Top right corner number: 108 | ||