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).
Performance graphs for S.S. and Phantom II rear dampers under various test conditions.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan094 | |
| Date | 3rd 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 □" Y-Axis: 154 LB/□" 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 □" Y-Axis: 154 LB/□" 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. TEMP. 25°C. AREA = 1.68 □" Y-Axis: 154 LB/□" 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 □" Y-Axis: 154 LB/□" 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 □" Y-Axis: 154 LB/□" 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: 154 LB/□" | ||