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 torsional rating test for a gearbox fabric coupling.
| Identifier | ExFiles\Box 94\2\ scan0039 | |
| Date | 7th October 1936 | |
| GEAR BOX FABRIC COUPLING TORSIONAL RATING TEST G80232 HARDY FABRIC 7-10-36 LOADING RELEASING ANGULAR MOVEMENT - DEGREES 2.5 2.0 1.5 1.0 0.5 -0.5 -1.0 -1.5 TORQUE - LB FT. -300 -200 -100 100 200 300 400 500 0 TO 500 LB FT TO 0 0 TO 500 LB FT TO -300 LB FT TO 0 | ||