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 a 20HP rear damper with a magnetically controlled leak, tested at 4' and 1' ball pin strokes.
| Identifier | ExFiles\Box 105\3\ scan0241 | |
| Date | 7th March 1932 | |
| MAGNETICALLY CONTROLLED LEAK - Hs{Lord Ernest Hives - Chair}552. 20HP REAR DAMPER - 140/140 LB. HIGH PRESSURE. .062" DIA LEAK. [Top Graph] 4" BALL PIN STROKE. Y-Axis: MAX: BALL PIN LOAD. Values: 50, 100, 150, 200. X-Axis Top: EQUIVALENT FLYWHEEL R.P.M. Values: 45, 90, 135, 180, 250. X-Axis Bottom: MEAN AXLE VELOCITY - FT/SEC. Values: 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 Legend: LEAK CLOSED, .030" LIFT, .050" LIFT [Bottom Graph] 1" BALL PIN STROKE. Y-Axis: MAX BALL PIN LOAD. Values: 50, 100, 150, 200. X-Axis Top: EQUIVALENT FLYWHEEL R.P.M. Values: 180, 360, 540, 720. X-Axis Bottom: MEAN AXLE VELOCITY - FT/SEC. Values: 0.5, 1.0, 1.5, 2.0, 2.5 Legend: LEAK CLOSED, .030" LIFT, .050" LIFT | ||