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).
Sheet 2 of performance graphs for P.II. Front Dampers under various test conditions.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan090 | |
| Date | 5th January 1931 guessed | |
| SHEET 2. P. II. FRONT DAMPERS. 1. 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: 154 LB/□", 0.80□", 52.3%) 1. 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: 154 LB/□", 2.11□", 106.5%) 2. 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: 154 LB/□", 0.66□", 45.9%) 2. 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: 154 LB/□", 2.10□", 113.5%) 3. 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: 154 LB/□", 0.57□", 41.7%) 3. S.S. A.C.D. 70/80 LB. HIGH 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: 154 LB/□", 2.23□", 113.5%) 4. 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: 154 LB/□", 0.58□", 39.4%) 4. 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: 154 LB/□", 2.5□", 103%) 5. 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: 154 LB/□", 1.04□", 65.2%) 5. 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: 154 LB/□", 2.06□", 102.5%) 6. 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: 154 LB/□", 1.11□", 69.7%) 6. 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: 154 LB/□", 2.09□", 107%) 7. 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: 154 LB/□", 1.20□", 74.1%) 7. 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: 154 LB/□", 2.07□", 106%) 8. 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 labels: 140 R.P.M., 120, 100, 80, 60, 40, 20, STATIC LOAD; 131 LB., 127 LB., 114 LB., 100 LB., 87.5 LB., 79 LB., 70 LB.) EQUIVALENT BALL PIN LOAD = 87.5 LB. IN DIAG.M 8. 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 labels: 140 R.P.M., 120, 100, 80, 60, 40, 20, STATIC LOAD; 157 LBS., 136 LBS., 127 LBS., 114 LBS., 98.5 LBS., 85 LB., 75 LB.) EQUIVALENT BALL PIN LOAD = 87.5 LB./IN DIAGRAM. | ||