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).
Sketched graph showing the probable effect of cold working on a shaft, plotting torque against wind-up angle.
| Identifier | ExFiles\Box 170\3\ img008 | |
| Date | 30th January 1936 guessed | |
| PROBABLE EFFECT OF COLD WORKING CHART IS ONLY SKETCHED Y-AXIS LABEL: TORQUE LBS/INS Y-AXIS VALUES: 28000, 24000, 20000, 16000, 12000, 8000, 4000 X-AXIS LABEL: WIND UP ANGLE . RADIANS X-AXIS VALUES: 0, 100, 200, 300, 400, 500, 600, 700, 800 TEXT ON GRAPH: FIRST YIELD 19530 LBS ins AT .20° WIND UP 25000 LBS. INS AT .45° WIND UP RIGHT SIDE TEXT: NEGATIVE STRESS ON SURFACE OF SHAFT WHEN RELEASED | ||