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 showing results of three tests on a dry, cadmium-plated front spring after a 4000-mile road test.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan108 | |
| Date | 12th September 1928 | |
| L FRONT SPRING TESTS - 12 EX. - CADMIUM PLATED F.78164 - 1050 LB - AFTER ROAD TEST - 4000 MILES -DRY- THIS SPRING WAS PURPOSELY NOT LUBRICATED DURING ONE TEST Graph 3: TEST N°3 DEFLECTION - INS: 5, 4, 3 APPLIED LOAD - LB -: 900, 1100, 1300, 1500, 1700 HYSTERISIS LBS.: 30, 88, 80, 76 Graph 2: TEST N°2 DEFLECTION - INS: 5, 4, 3 APPLIED LOAD - LB -: 900, 1100, 1300, 1500, 1700 HYSTERISIS LBS.: 72, 68, 68, 66 Graph 1: TEST N°1 DEFLECTION - INS: 5, 4, 3 APPLIED LOAD - LB -: 900, 1100, 1300, 1500, 1700 HYSTERISIS LBS.: 96, 90, 80, 72 | ||