Two graphs showing the results of spring rating tests, analysing internal friction and the agreement of independent tests.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan167 | |
| Date | 27th May 1926 guessed | |
| (1) SPRING RATING TESTS. (€) AND (€II). EFFECT OF INTERNAL FRICTION. RATING LBS/IN TOTAL SPRING LOAD. LBS. WORKING RANGE GRADUAL BUMP NARROW PADS VERTICAL SHACKLE € II € (2) SPRING RATING TESTS. (α) AND (β). AGREEMENT OF INDEPENDENT TESTS. WIDE AXLE PADS. RATING LBS/IN TOTAL LOAD. LBS. α = 21° SHACKLE β = VERTICAL SHACKLE | ||
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).