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 results of fatigue tests on rubber, plotting life cycles against percentage extension and compression.
| Identifier | ExFiles\Box 178\2\ img062 | |
| Date | 6th March 1940 | |
| Ogs.P/253340 Serial 42 OSCILLATION CYCLE 200% OF UNSTRESSED LENGTH. LIFE TEST IN KILOCYCLES 10⁵ 10⁴ 10³ 10² 10¹ PERCENT COMPRESSION 100 PERCENT EXTENSION AT MID STROKE 100 200 300 400 500 600 FATIGUE TESTS ON RUBBER CADWELL ASTM PAPER MAR 6/40. | ||