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 torsional stiffness of a ball-pin for a Wraith II shock damper rubber connecting tube.
| Identifier | ExFiles\Box 151\2\ scan0326 | |
| Date | 17th February 1937 | |
| WRAITH II SHOCK DAMPER RUBBER CONNECTING TUBE LEC 5160 TORSIONAL STIFFNESS OF BALL-PIN RUBBER PADS FN 600 SHORTENED .050" ANGLE OF TWIST - DEGREES 50 40 30 20 10 0 TORQUE - LB. FT. 0 1 2 3 4 5 6 | ||