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 spring load, showing the effect of internal friction under gradual and bump loading.
| Identifier | ExFiles\Box 67a\1\ scan0218 | |
| Date | 27th May 1925 guessed | |
| (8) SPRING RATING TESTS (B) AND (B II). EFFECT OF INTERNAL FRICTION. WIDE PAD. VERTICAL SHACKLE. SPRING RATING LBS/IN. TOTAL SPRING LOAD. LBS. B II = GRADUAL LOADING. B = BUMP LOADING. B II B | ||