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 plotting the life cycle test results for various leaf spring and suspension systems.
| Identifier | ExFiles\Box 154a\2\ scan0359 | |
| Date | 1st July 1941 guessed | |
| LEAF SPRING LIFE TEST. Y-AXIS: STROKE INCHES. SYMMETRICAL ABOUT NORMAL LOAD POSITION. X-AXIS: THOUSANDS OF CYCLES (LOGARITHMIC) GRAPH LABELS: PROBABLE APPROX LIFE CURVE EXPECTANCY LEAF SPRING CHEVROLET DUBONNET SUSPENSION VAUXHALL 10 REAR SPRINGS ORIG 6 LEAF (AV) EATON GROOVED 7 LEAF IMPROVED 6 LEAF, LOW LIMIT 8 LEAF UPPER LIMIT 8 LEAF WISHBONE SUSPENSION TESTS DEFECTIVE G TYPE TUBE (25 HP VAUXHALL) DEFECTIVE C TYPE ROD FAIR G TYPE TORSION ROD 30 HRS ON BUMP RIG 3" CAMS EARLY RESULTS BUMP RIG G TYPE TORSION RODS 100 HRS ON BUMP RIG 2"CAM 1,300,000 CYCLES. | ||