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 graph and diagram for a Wraith II gearbox rear support bracket.
| Identifier | ExFiles\Box 8\7\ 07-page21 | |
| Date | 17th February 1937 | |
| WRAITH II GEARBOX REAR SUPPORT BRACKET N SCH 4862 TORSION TEST A B LOAD APPLIED AT END OF LEVER 1 FOOT RAD. DEFN AT 'A' DEFN AT 'B' ANGLE OF TWIST - DEGREES TORQUE - LB. FT. LOADING UN-LOADING | ||