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 deflection test on a 10-inch clutch disc, designated Disc C.
| Identifier | ExFiles\Box 130\3\ scan0190 | |
| Date | 5th March 1941 | |
| TORSIONAL DEFLECTION TEST ON 10" CLUTCH DISC. 5/3/41 DISC C STOP PIN SHOULDER DIM. .147/.162. TWO .015" SPACERS. BOTH ON FLYWHEEL SIDE OF HUB FLANGE. RED SPRINGS. FRICTION LOOP DEPTH (R.R. TEST) DRIVE 10 LB. FT. OVER-RUN 10 LB. FT. DRIVE OVER-RUN DEFLECTION — DEGREES. TORQUE LB. FT. TESTS BY RM{William Robotham - Chief Engineer}/CLM{D. D. Clapham} Rm{William Robotham - Chief Engineer} / G.B. | ||