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 internal friction under different loading conditions.
| Identifier | ExFiles\Box 43\2\ Scan165 | |
| 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. TOTAL SPRING LOAD LBS. B II = GRADUAL LOADING B = BUMP LOADING B II B | ||