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 of chassis and body torsion test results for a Wraith chassis.
| Identifier | ExFiles\Box 86\4\ scan0231 | |
| 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 Top Axis: 15.5", 17", 17.5", 26", 26", 18.5", 30.5", 26.5" Left Y-Axis (Torque): 57,000 LBS INS, 42,750 LBS INS, 28,500 LBS INS, 14,250 LBS INS Left Y-Axis (Angle): 6°, 5°, 4°, 3°, 2°, 1°, 0° Bottom X-Axis: FRONT CROSS MEMBER, FRONT AXLE, DASH, BODY BRACKET, BODY BRACKET, REAR SPRING SHACKLE ANCHORAGE, REAR AXLE | ||