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 showing the effect of a 20° inclination of a spring shackle on load and stiffness.
| Identifier | ExFiles\Box 43\2\ Scan146 | |
| Date | 14th May 1926 guessed | |
| EFFECT OF 20° INCLINATION OF SPRING SHACKLE LOAD LBS 2000 1800 1600 1400 1200 1000 800 600 400 200 0 DEFLECTION INS. 0, 1", 2", 3", 4", 5", 6" STIFFNESS LBS/IN 400 300 200 100 Graph Lines: LOAD WITH 20° SHACKLE LOAD ON ROLLERS STIFFNESS WITH 20° SHACKLE STIFFNESS ON ROLLERS 310 LBS/IN Edge Text: EUGENE DIETZGEN CO., INC. NEW YORK, N.Y. No. 340 S | ||