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).
Chart showing the results of a torsional deflection test on a 10-inch clutch disc.
| Identifier | ExFiles\Box 130\3\ scan0189 | |
| Date | 5th March 1941 | |
| TORSIONAL DEFLECTION TEST ON 10" CLUTCH DISC. DISC B STOP PIN SHOULDER DIM. .154/.151 EACH TWO .015" SPACERS, ONE ON SIDE OF HUB FLANGE. RED SPRINGS. FRICTION LOOP DEPTH (R.R. TEST) DRIVE 9 LB. FT. OVER RUN 11 LB. FT. OVER RUN DRIVE TESTS BY RM{William Robotham - Chief Engineer}/CLM.{D. D. Clapham} Rm{William Robotham - Chief Engineer}/G.B. DEFLECTION - DEGREES. TORQUE LB. FT. | ||