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).
Torsion test results for the Wraith 'Bumper' chassis and body.
| Identifier | ExFiles\Box 8\10\ 10-page118 | |
| Date | 10th June 1937 | |
| CHASSIS & BODY TORSION TESTS WRAITH "BUMPER" CHASSIS FRAME 0.080" THICK NO LARGE HOLES TABLE DATA: HEADERS: TORQUE LBS-INS., FRONT CROSS-MEMBER, FRONT AXLE, DASH, BODY BRACKET, BODY BRACKET, REAR SPRING SHACKLE ANCHORAGE, REAR AXLE ROW 1: 14,250, 1-25, 1-10, 0-55, 0-50, 0-35, 0-30, 0-15, WITHOUT ROW 2: 28,500, 2-35, 2-20, 1-45, 1-25, 1-05, 0-55, 0-50, 0-25, HYSTERESIS ROW 3: 42,750, 4-20, 3-50, 3-05, 2-30, 1-55, 1-40, 1-25, 0-40 ROW 4: 57,000, 6-05, 5-10, 4-10, 3-35, 2-35, 2-05, 1-45, 0-55, W.B. | ||