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).
Graph showing the results of three road spring tests, plotting deflection against applied load.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan106 | |
| Date | 18th August 1928 | |
| J.{Mr Johnson W.M.} 1100 LB- 18-8-28 ROAD SPRING TESTS STANDARD FRONT - F.71975- OFF 78 N.K. AFTER 3½ YEARS SERVICE CLEANED AND LUBRICATED DEFLECTION - INS APPLIED LOAD - LB- HYSTERISIS LBS. TEST Nº3 70 60 50 40 TEST Nº2 40 38 36 34 TEST Nº1 24 Graph X-Axis values: 1200, 1400, 1600, 1800, 2000 Graph Y-Axis values: 5.5, 4.5, 3.5 | ||