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).
Series of graphs showing road spring test results for a standard front spring after 3.5 years of service.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan105 | |
| 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. HYSTERESIS LBS. Graph 1: Left Y-Axis: 3.0, 4.0, 5.0 X-Axis: 1200, 1400, 1600, 1800, 2000 Right Y-Axis: 100, 120, 138, 156 Graph 2: Left Y-Axis: 3.0, 4.0, 5.0 X-Axis: 1200, 1400, 1600, 1800, 2000 Right Y-Axis: 104, 116, 128, 140 Graph 3: Left Y-Axis: 3.0, 4.0, 5.0 X-Axis: 1200, 1400, 1600, 1800, 2000 Right Y-Axis: 80, 112, 140, 172 | ||