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 and diagram showing the results of a lateral distortion test on a 40/50 spring under load.
| Identifier | WestWitteringFiles\J\March1923\ Scan26 | |
| Date | 15th March 1928 guessed | |
| 40/50 Spring 42" Centres 1100 LB Loading SPRING TEST LATERAL DISTORTION UNDER LOAD LOAD E Is 28" FROM SPRING CENTRE WT TO REMOVE SPRING CAMBER Y-Axis: LOAD CWT, 2, 4, 6, 8, 10 X-Axis: VERTICAL DISTORTION AT E IN INS., 0, .020, .040, .060, .080, .100, .120, .140, .160 1° ANGLE Θ 2° TWIST OF TOP PLATE OF SPRING TOWARDS P A S LOAD IS APPLIED (TRR) | ||