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 six graphs showing performance characteristics of Phantom II rear dampers under various test conditions.
| Identifier | ExFiles\Box 16\4\ Scan239 | |
| Date | 5th January 1931 guessed | |
| SHEET 4. P.II REAR DAMPERS Top Left Graph: S.S. REAR DAMPERS. 80/85 LB. Low Press. PRESS. PIPE ATTACHED TO L.P. REFILL VALVE. 450 R.P.M. 1" STROKE. TEMP. 25°C. AREA = 1.59▢" Top Right Graph: S.S. REAR DAMPER. 80/85 LB. High Press. PRESS PIPE ATTACHED TO H.P. REFILL VALVE. 450 R.P.M. 1" STROKE. TEMP. 25°C. AREA = 1.59▢" Middle Left Graph: S.S. REAR DAMPER - 80/85 LB. Low Pressure. PRESS. PIPE TO L.P. REFILL VALVE. .032" DIA. HOLE IN H.P. VALVE. 450 R.P.M. 1" STROKE. 25°C. AREA = 1.68▢" Middle Right Graph: S.S. REAR DAMPER. 80/85 LB. High Press. PRESS PIPE ATTACHED TO H.P. REFILL VALVE. .032" DIA. HOLE IN H.P. VALVE. 450 R.P.M. 1" STROKE. TEMP. 25°C. AREA = 1.68▢" Bottom Left Graph: S.S. REAR DAMPER = 80/85 LB. Low Press. PRESS. PIPE ATTACHED TO L.P. REFILL VALVE. 450 R.P.M. 1.5" STROKE. TEMP. 25°C. AREA = 2.48▢" Bottom Right Graph: S.S. REAR DAMPER. 80/85 LB. High Press. PRESS PIPE ATTACHED TO H.P. REFILL VALVE. 450 R.P.M. 1/2" STROKE. TEMP. 25°C. Y-Axis Label (all graphs): 154 LB/D" | ||