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 and data tables showing results of torsion tests on a 'Myth' frame.
| Identifier | ExFiles\Box 110\2\ scan0065 | |
| Date | 22th December 1943 | |
| TORSION TESTS ON MYTH FRAME Key | Test. | Date. | Rate between front and rear wheels. | Remarks. --- | --- | --- | --- | --- [Solid Line] | 1 | 7/12/41 | 394 lb.ft/degree | as HP.2259. [Dashed Line] | 2 | 14/12/43 | 538 lb.ft/degree | Front member boxed in to PL.1127. [Long-Dashed Line] | 3 | 20/12/43 | 509 lb.ft/degree | As test 2, but with additional tack-welding between side members, uniform and 2nd. cross member. NOTES (a) Front Pan (which is to be rubber mounted) was not fitted for these tests. (b) Torque actually applied was 268 lb.ft. for test 1, and 406 lb.ft. for tests 2 and 3. [Illegible data table] GRAPH Y-Axis: TWIST PER 1000 LB-FT (DEGREES RELATIVE TO REAR WHEELS) X-Axis: DISTANCE FROM FRONT WHEELS (INCHES) X-Axis Labels: 0, 20, 40, 60, 80, 100, 120, 140 Plot Labels: FRONT AXLE FRONT BODY MOUNTING BRACKETS CENTRE OF CRUCIFORM 2ND. BODY MOUNTING BRACKETS REAR WHEELS FRONT OF REARMOST CROSSMEMBER FJH{Fred J. Hardy - Chief Dev. Engineer}/GB./JCC | ||