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 to show the effect of internal friction under gradual and bump loading.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan168 | |
| Date | 27th May 1926 guessed | |
| (8) SPRING RATING TESTS (B) AND (B II). EFFECT OF INTERNAL FRICTION. WIDE PAD. VERTICAL SHACKLE. SPRING RATING LBS/IN. B II = GRADUAL LOADING. B = BUMP LOADING. TOTAL SPRING LOAD LBS. B II B | ||