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).
Test results for spring performance showing camber, load, and stiffness under various clipping and support configurations.
| Identifier | ExFiles\Box 43\2\ Scan122 | |
| Date | 5th April 1928 | |
| OyS-E-4526 -2- April 5, 1928 (2) As above but spring clipped to central plate representing wide axle pad. Camber Load Stiffness 2" 388 315 1" 703 332 0 1035 342 -1" 1377 395 -2" 1762 (3) Spring, not clipped, supported on shackle one end. Shackle approximately square with spring in flat position. Camber Load Stiffness 2" 467 294 1" 761 308 0" 1069 308 -1" 1377 313 -2" 1690 (4) Spring not clipped. Supported on shackle one end. Shackle inclined approximately 30° inwards, i.e. opposite to Phantom. Camber Load Stiffness 2" 507 286 1" 793 299 0" 1092 255 -1" 1347 214 -2" 1561 [Red stamp over section 3 data: COPY] | ||