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 graph for a hydraulic damper with staggered orifices, plotting oil pressure against piston velocity at various temperatures.
| Identifier | ExFiles\Box 68\2\ scan0219 | |
| 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% OIL PRESS LBS/D'' PISTON VEL INS/SEC -10°C 0°C 50°C .218 DIA .110 .200 .150 .500 6H | ||