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 of spring rating tests showing the effect of deflection due to shackle movement.
| Identifier | ExFiles\Box 67a\1\ scan0222 | |
| Date | 28th May 1926 guessed | |
| (12) SPRING RATING TESTS. (E) Effect of deflection due to Shackle movement SPRING RATING LBS/IN Corrected Bump Loading Narrow Pad Vertical Shackle Corrected OII e TOTAL LOAD LBS 450 400 350 300 250 0 300 600 900 1200 1500 1800 | ||