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 | ExFiles\Box 55\4\ Scan237 | |
| Date | 18th July 1928 guessed | |
| COMPARISON OF STANDARD AND AMERICAN REAR SHOCK ABSORBERS. 200 LBS/□' H.P. 3.7" STROKE. A 330 LBS/□' H.P. 11" STROKE. A 200 LBS/□' H.P. 7" STROKE. A 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. | ||