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).
Results of a torsion test on a 20HP No.2 axle, showing permanent set under various loads and distances.
| Identifier | ExFiles\Box 101\1\ scan0036 | |
| Date | 14th October 1925 | |
| AXLE TORSION TEST - 20HP - [NO.2] G52431 TABLE 1: TOP DISTANCE FROM CENTRE | PERMANENT SET 0 | +.078 1" | +.100 2" | +.095 3" | +.122 4" | +.070 5" | +.031 6" | +.020 6.75 | ZERO BOTTOM DISTANCE FROM CENTRE | PERMANENT SET 0 | -.150 1" | -.083 2" | -.065 3" | -.040 4 | ZERO 5 | ZERO GRAPH 1: Vertical Axis: PERMANENT SET [INCHES] Horizontal Axis: [DISTANCE IN INCHES] Vertical Text: LOAD APPLIED TWICE TO BEND AXLE IN THIS DIRECTION Graph Lines: TOP, BOTTOM TABLE 2: DISTANCE FROM PIVOT BORE CENTRE [TOP] DISTANCE FROM PIVOT BORE CENTRE [BOTTOM] LOAD [LBS] | PERMANENT SET --- | DEGS | MINS 1000 | - | 3 1500 | - | 25 1600 | - | 31 1700 | - | 35 1800 | - | 41 1900 | - | 58 2000 | 1 | 12 2050 | 1 | 35 2100 | 2 | 0 2150 | 2 | 18 2200 | 2 | 27 2250 | 3 | 13 2275 | 3 | 22 2300 | 3 | 39 2325 | 3 | 54 2350 | 4 | 25 GRAPH 2: RELATION BETWEEN LOAD AND PERMANENT SET ALONG ¢ OF PIVOT LOAD APPLIED AT 11.7" RADIUS Vertical Axis: PERMANENT SET [DEGREES] Horizontal Axis: LOAD - [LBS] Diagram Labels: ¢ OF PIVOT BORE TOP BOTTOM A, B, A' | ||