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).
Graphs of road spring tests showing deflection vs applied load for a standard front spring after 3.5 years of service.
| Identifier | ExFiles\Box 52\2\ Scan183 | |
| Date | 18th August 1928 | |
| H ROAD SPRING TESTS 18-8-28 STANDARD FRONT- F. {Mr Friese} 71975 - 1150 LB - OFF 78 N.K. AFTER 3 1/2 YEARS SERVICE. DRY DEFLECTION - INS - APPLIED LOAD - LB - HYSTERISIS LBS 5.0 4.0 3.0 1200 1400 1600 1800 2000 156 138 120 100 140 128 116 104 172 140 112 80 | ||