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).
Graph of oil pressure versus piston velocity for a hydraulic damper with staggered orifices at different temperatures.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan075 | |
| Date | 30th March 1928 guessed | |
| HYDRAULIC DAMPER HIGH PRESSURE PASSAGE COMPRESSOR OIL STAGGERED ORIFICES NORMAL TEMP 0-40°C % VARIATION 1% EXCEPTIONAL TEMPS -10 - +50°C % VARIATION 6% -10°C 0°C 50°C OIL PRESS LBS/□'' 900 800 700 600 500 400 300 200 100 PISTON VEL INS/SEC 2 4 6 8 10 12 14 .218 DIA .110 .200 .150 .500 6H | ||