Performance charts for a Delco II adjustable rear damper under different leak and pressure settings.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan139 | |
| Date | 14th February 1931 guessed | |
| SET 3 DELCO REAR DAMPER. ADJUSTABLE LEAK 12" LEVER. Top-Left Chart: DELCO II LOW PRESSURE 1" STROKE. N°1 LEAK. MAX PRESSURES. 550 R.P.M. --- 115 LB/D" 450 R.P.M. --- 115 " 300 R.P.M. --- 92.5 " 200 R.P.M. --- 77 " Y-Axis: 154 LB/D" Top-Right Chart: DELCO II HIGH PRESSURE 1" STROKE. N°1 LEAK. MAX. PRESSRS 536 R.P.M. --- 970 LB/D" 450 " --- 785 " 300 " --- 693 " 200 " --- 508 " Y-Axis: 462 LB/D" Middle-Left Chart: DELCO II LOW PRESSURE 1" STROKE. N°3 LEAK. MAX. PRESSURES. 550 R.P.M. --- 115 LBS/D" 450 R.P.M. --- 100 " 300 R.P.M. --- 85 " 200 R.P.M. --- 61.5 " Y-Axis: 154 LB/D" Middle-Right Chart: DELCO II HIGH PRESSURE 1" STROKE. N°3 LEAK. MAX. PRESSURES 550 R.P.M. --- 855 LB/D" 520 R.P.M. --- 809 " 450 R.P.M. --- 740 " 300 R.P.M. --- 485 " 200 R.P.M. --- 392 " Y-Axis: 462 LB/D" Bottom-Left Chart: DELCO II LOW PRESSURE 1" STROKE. N°4 LEAK. MAX. PRESSURES. 600 R.P.M. --- 123 LB/D" 450 R.P.M. --- 100 " 300 R.P.M. --- 85 " 200 R.P.M. --- 69 " Y-Axis: 154 LB/D" Bottom-Right Chart: DELCO II HIGH PRESSURE 1" STROKE. N°4 LEAK. MAX. PRESS. 550 R.P.M. --- 715 LB/D" 450 R.P.M. --- 646 " 300 R.P.M. --- 554 " 200 R.P.M. --- 370 " Y-Axis: 462 LB/D" | ||
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).