Results of a torsion test on a 20 HP axle, graphing permanent set against distance and load.
| Identifier | ExFiles\Box 101\1\ scan0035 | |
| Date | 14th October 1925 guessed | |
| TORSION TEST OF 20 H.P. AXLE --- Top Right Table: TOP INCHES FROM PIVOT CENTRE | INCHES FROM CENTRE LINE 0 | +.090 1 | +.085 2 | +.095 3 | +.125 4 | +.125 5 | +.1015 6 | -.013 6.7 | -.015 7.70D | 0 BOTTOM INCHES FROM PIVOT CENTRE | INCHES FROM CENTRE LINE 0 | -.125 1 | -.105 2 | -.068 3 | -.030 4 | -.005 5 | +.015 6 | +.020 6.87 | .011 7.70D | 0 --- Middle Right Table: LOAD [LBS] | PERMANENT SET [Degs. Mins.] 1300 | - | 4 1500 | - | 8 1700 | - | 13 1800 | - | 18 1900 | - | 21 2000 | - | 28 2100 | 1 | 0 2200 | 1 | 10 2300 | 1 | 50 2400 | 2 | 20 2500 | 4 | 20 --- Top Graph Text: Labels: A, B, A1 Left Y-Axis: PERMANENT SET [INCHES] Axis Values: +.100, +.050, 0, -.050, -.100, -.150 Horizontal Labels: BOTTOM DATUM LINE, TOP DATUM LINE, DISTANCE FROM PIVOT CENTRE [INCHES], DISTANCE FROM PIVOT CENTRE (PART H) X-Axis Values: 0, 1, 2, 3, 4, 5, 6 Bottom X-Axis Values: 0, 1', 2', 3', 4', 5', 6' Text on left edge: LOAD APPLIED TENDS TO BEND AXLE THIS WAY --- Bottom Graph Text: Title: RELATION BETWEEN PERMANENT SET AND LOAD Subtitle: LOAD ACTS AT 11.7 RADIUS Left Y-Axis: PERMANENT SET [DEGREES] Axis Values: 4, 3, 2, 1 Bottom X-Axis: LOAD [LBS] Axis Values: 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500 | ||
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).