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 a torsion test on a Silver Wraith frame.
| Identifier | ExFiles\Box 109\1\ scan0077 | |
| Date | 15th November 1938 guessed | |
| SILVER WRAITH FRAME TORSION TEST 1 AS RECEIVED 2 REAR OF CROSS BOXED IN 3 REAR OF CROSS BOXED IN & GUSSETS WELDED ON TOP 4 REAR OF CROSS BOXED IN & GUSSETS WELDED TOP & BOTTOM 5 REAR OF CROSS BOXED IN GUSSETS WELDED TOP & BOTTOM & THICK PLATES CENTRE OF CROSS 6 REAR OF CROSS BOXED IN GUSSETS WELDED TOP & BOTTOM, THICK PLATES CENTRE OF CROSS & CENTRE OF SIDE MEMBERS BOXED IN Y-AXIS: TWIST IN DEGREES DUE TO A TORQUE OF 1000 LBS FT X-AXIS: INCHES ALONG FRAME REAR AXLE DASH FRONT WHEELS | ||