Four indicator diagrams comparing Double Piston Damper performance under different pressure and spring configurations.
| Identifier | ExFiles\Box 56\1\ Scan138 | |
| Date | 28th May 1931 | |
| Top Left Quadrant: DOUBLE PISTON DAMPER - LOW PRESSURE. REDUCED H.P. VALVE - Hs. {Lord Ernest Hives - Chair} 354 - 8 LB. 200 LB/IN RATING SPRING L.P. PORT CHAMBERED OUT - DA {Bernard Day - Chassis Design} 'S SCHEME, Hs. {Lord Ernest Hives - Chair} 355 4" STROKE - NOISY 150 R.P.M 70 " Y-Axis: 308 LB/IN X-Axis: 120 " I.S. Top Right Quadrant: DOUBLE PISTON DAMPER - HIGH PRESSURE. REDUCED H.P. VALVE - Hs. {Lord Ernest Hives - Chair} 354 - 8 LB. 200LB/IN RATING SPRING L.P. PORT CHAMBERED OUT - DA {Bernard Day - Chassis Design} 'S SCHEME, Hs. {Lord Ernest Hives - Chair} 355 4" STROKE - NOISY 150 R.P.M 70 " Y-Axis: 308 LB/IN X-Axis: 120 " I.S. Bottom Left Quadrant: DOUBLE PISTON DAMPER - LOW PRESSURE. REDUCED H.P. VALVE. Hs. {Lord Ernest Hives - Chair} 354 - 8 LB. 200 LB/IN RATING SPRING. 50 LB. PISTON SPRINGS 4 STROKE - NOISY. 150 R.P.M. 70 " Y-Axis: 308 LB/IN X-Axis: 120 " I.S. Bottom Right Quadrant: DOUBLE PISTON DAMPER. HIGH PRESSURE. REDUCED H.P. VALVE - Hs. {Lord Ernest Hives - Chair} 354 - 8 LB. 200 LB/IN. RATING SPRING. 50 LB. PISTON SPRINGS. 4" STROKE - NOISY. 150 R.P.M. 70 " Y-Axis: 308 LB/IN X-Axis: 120 " I.S. Stamped Text: RECEIVED 4 JUN 31 Dates on document: 28.5.31, 27.5.31 | ||
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).