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).
Comparison table of characteristics for Viscosity Loading and Standard rear hydraulic shock dampers.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan028 | |
| Date | 18th June 1928 guessed | |
| ROLLS-ROYCE REAR HYDRAULIC SHOCK DAMPER CHARACTERISTICS. | Stroke in ins. at end of 13.5" lever. | | VISCOSITY LOADING DAMPER. | | | | STANDARD DAMPER. | | | | |---|---|---|---|---|---|---|---|---|---| | | | M.E.P. | Max:press: | Low press: Readings as % of high press. | | M.E.P. | Max:press: | Low press: MEP. as % of high pressure. | | | | | | | M.E.P. | Max: press: | | | M.E.P. | Max:press: | |---:|:---|---:|---:|---:|---:|---:|---:|---:|---:| | 3.7" stroke | H.P. | 250 | 275 | 72% | 73% | 236 | 300 | 54% | 50% | | 200 cycles. per min. | L.P. | 180 | 200 | | | 127 | 150 | | | | 7" stroke | H.P. | 430 | 530 | 81% | 85% | 365 | 400 | 47% | 50% | | 200 cycles per min. | L.P. | 355 | 450 | | | 170 | 200 | | | | 11" stroke | H.P. | 635 | 825 | 85% | 85% | 425 | 500 | 45% | 46% | | 200 cycles per min. | L.P. | 540 | 700 | | | 190 | 230 | | | | Slow movement. | H.P. | 200 | 220 | 90% | 90% | 230 | 230 | 80% | 80% | | | L.P. | 180 | 200 | | | 185 | 185 | | | | ||