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).
Road spring tests for a standard front spring after 3 1/2 years of service, tested dry.
| Identifier | ExFiles\Box 67a\2\ scan0195 | |
| Date | 18th August 1928 | |
| H ROAD SPRING TESTS STANDARD FRONT F.71975 - 1150 LB - OFF 78 N.K. AFTER 3 1/2 YEARS SERVICE. DRY DEFLECTION - INS. APPLIED LOAD - LB. HYSTERISIS LBS. 18-8-28 5.0 4.0 3.0 1200 1400 1600 1800 2000 100 120 138 156 104 116 128 140 80 112 140 172 | ||