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 spring rating against total load to show the effect of deflection due to shackle movement.
| Identifier | ExFiles\Box 43\2\ Scan168 | |
| Date | 27th May 1926 guessed | |
| (13) SPRING RATING TESTS. (E) Effect of Deflection due to Shackle movement SPRING RATING LBS/IN. TOTAL LOAD LBS 450 400 350 300 250 0 300 600 900 1200 1500 1800 Corrected Bump Loading Narrow Pad Vertical Shackle Corrected VII e | ||