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 load and stiffness curves illustrating the stiffening effects on a front spring under various conditions.
| Identifier | ExFiles\Box 43\2\ Scan126 | |
| Date | 12th October 1938 | |
| STIFFENING EFFECTS ON FRONT SPRING DUE TO Ⓐ CLIPPING ON WIDE AXLE PAD (4.4" WIDE). Ⓑ INCLINED SHACKLE (INCLINED 21.1° TO VERTICAL). SPRING TESTED WITH ENDS FREE (No Cup) EFFECT OF WIDE AXLE PAD EFFECT OF CHANGE IN LEVEL OF SHACKLED SUPPORT EFFECT OF HORIZONTAL TENSION FROM FRONT SHACKLE LOAD CURVES STIFFNESS CURVES Y-AXIS LEFT: LOAD AT CENTRE (LBS.) Y-AXIS RIGHT: STIFFNESS. LBS. PER INCH. X-AXIS: CAMBER CURVE LABELS: ORIGINAL SPRING WIDE AXLE PAD CHANGE IN LEVEL HORIZONTAL TENSION REFERENCE & DATE: ET.84 / D2 / 12.10.38 | ||