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 performance graphs for Phantom II front dampers under various test conditions.
| Identifier | ExFiles\Box 16\4\ Scan235 | |
| Date | 5th January 1931 guessed | |
| SHEET 2 P.II. FRONT DAMPERS 1. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Graph values: 0.80", 52.3%. Y-Axis: 154 LB/D". 1. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.11", 106.5%. Y-Axis: 154 LB/D". 2. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESS. .025" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 0.66", 45.9%. Y-Axis: 154 LB/D". 2. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. HIGH PRESS. .025" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.10", 113.5%. Y-Axis: 154 LB/D". 3. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESS. .025" DIA. AIR VENT. STD. LIFT 3/16". VALVE COVERS CHANGED OVER, LEAK ON H.P. STROKE. 450 R.P.M. 1" STROKE. 25°C. Graph values: 0.57", 41.7%. Y-Axis: 154 LB/D". 3. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". VALVE COVERS CHANGED OVER. LEAK ON H.P. STROKE. 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.23", 113.5%. Y-Axis: 154 LB/D". 4. LOW PRESSURE: S.S. A.C.D. 90/100 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 0.58", 39.4%. Y-Axis: 154 LB/D". 4. HIGH PRESSURE: S.S. A.C.D. 90/100 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.5", 103%. Y-Axis: 154 LB/D". 5. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESS. .055" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 1.04", 65.2%. Y-Axis: 154 LB/D". 5. HIGH PRESSURE: S.S. A.C.D. 70/80 LBS. HIGH PRESS. .055" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.06", 102.5%. Y-Axis: 154 LB/D". 6. LOW PRESSURE: S.S. A.C.D. 70/80 LOW PRESS. .093" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 1.11", 69.7%. Y-Axis: 154 LB/D". 6. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. HIGH PRESS. .093" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.09", 107%. Y-Axis: 154 LB/D". 7. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESSURE. .156" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 1.20", 74.1%. Y-Axis: 154 LB/D". 7. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. HIGH PRESSURE. .156" DIA. AIR VENT. STD. LIFT 3/16". 450 R.P.M. 1" STROKE. 25°C. Graph values: 2.07", 106%. Y-Axis: 154 LB/D". 8. LOW PRESSURE: S.S. A.C.D. 70/80 LB. LOW PRESSURE. .025" DIA. AIR VENT. 3/16" LIFT. .187" DIA. REFILL HOLE. "YANKEE TYPE". 4" STROKE. 25°C. VARIOUS SPEEDS. Graph details: 140 R.P.M., 120, 100, 80, 60, 40, 20. STATIC LOAD. Load values: 131 LB, 127 LB, 114 LB, 100 LB, 87.5 LB, 79 LB, 70 LB. Y-Axis: 154 LB/D". Note: EQUIVALENT BALL PIN LOAD = 87.5 LB / IN DIAGm. 8. HIGH PRESSURE: S.S. A.C.D. 70/80 LB. HIGH PRESSURE. .025" DIA. AIR VENT. 3/16" LIFT. .187" DIA. REFILL HOLE. "YANKEE TYPE". 4" STROKE. 25°C. VARIOUS SPEEDS. Graph details: 140 R.P.M., 120, 100, 80, 60, 40, 20. STATIC LOAD. Load values: 157 LB, 135 LB, 127 LBS, 114 LBS, 98.5 LBS, 85 LB, 75 LB. Y-Axis: 154 LB/D". Note: EQUIVALENT BALL PIN LOAD = 87.5 LB / IN DIAGRAM. | ||