Performance graphs for a Double Piston Damper under high and low pressure conditions.
| Identifier | ExFiles\Box 56\1\ Scan179 | |
| Date | 10th June 1931 | |
| TOP GRAPH: DOUBLE PISTON DAMPER. HIGH PRESSURE. 10-6-31. MASKED VALVE -.010" CLEARANCE -.025" DIA. H.P. VALVE LEAK. VALVE SPRING 200 LB/IN (APPROX) '4" STROKE. 70 R.P.M. SYLPHON PRESSURES 0-3 LB/D" 10" LEVER. Y-AXIS: 32 LB/IN BALL PIN LOAD, 308 LB/D" X-AXIS: 120" I.S. TABLE: SYL. 30 LB/D" B.P. 285 LB. " 25 " " 255 " " 20 " " 223 " " 15 " " 185 " " 10 " " 148 " " 6 " " 114 " " 0 " " 87 " BOTTOM GRAPH: DOUBLE PISTON DAMPER. LOW PRESSURE. 10-6-31 MASKED VALVE -.010" CLEARANCE -.025" DIA. H.P. LEAK. VALVE SPRING 200LB/IN (APPROX.) 4" STROKE. 70 R.P.M. SYLPHON PRESSURES 0-30 LB/D" 10" LEVER. Y-AXIS: 132 LB/IN. BALL PIN LOAD, 308 LB/D" X-AXIS: 120" I.S. TABLE: SYL. 30 LB/D" B.P. 251 LB " 25 " " 226 " " 20 " " 198 " " 15 " " 170 " " 10 " " 143 " " 6 " " 116 " " 0 " " 92 " | ||
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).