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 chassis and body torsion tests for a Wraith chassis.
| Identifier | ExFiles\Box 8\10\ 10-page137 | |
| Date | 17th June 1937 | |
| CHASSIS & BODY TORSION TESTS WRAITH CHASSIS. 26 G VI FRAME 0.128" THICK - WITH LARGE HOLES AND 0.010" THICKER CROSS WITH FRONT CROSS - CHANNEL WITHOUT HYSTERESIS 10,000 LBS. INS. PER DEGREE TWIST 17 JUNE 1937 W. 10 Top axis (in inches): 15.5", 17", 17.5", 26", 26", 16.5", 30.5", 26.5" Left axis (Y-axis): 57,000 LBS INS, 6°, 5°, 42,750 LBS INS, 4°, 3°, 28,500 LBS INS, 2°, 14,250 LBS INS, 1°, 0° Bottom axis (X-axis): FRONT CROSS MEMBER, FRONT AXLE, DASH, BODY BRACKET, BODY BRACKET, REAR SPRING SHACKLE ANCHORAGE, REAR AXLE | ||