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 of standard and American rear shock absorbers using high-pressure diagrams.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan088 | |
| Date | 18th July 1928 guessed | |
| COMPARISON OF STANDARD AND AMERICAN REAR SHOCK ABSORBERS. 200 LBS/□" H.P 3.7" STROKE. 330 LBS/□" H.P. 11" STROKE. 200 LBS/□" H.P 7" STROKE. SLOW RUNNING APPROX 40 CYCLES. PER MIN. HIGH PRESSURE DIAGRAMS. COMPARISON OF BEST SETTING FOUND BY AMERICA WITH STANDARD DERBY PRACTICE 13" LEVER .024 AIR VENT 20°c OIL TEMP STANDARD DAMPER LOADING 60/80 AMERICA LOADING 60/100 SLOTTED LEAKS IN H.P. VALVE AREA .003 □" 200 CYCLES/MIN. (Left Margin) Filing Spec | ||