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.
| Identifier | ExFiles\Box 130\3\ scan0212 | |
| Date | 27th June 1941 | |
| TORSIONAL DEFLECTION TEST ON 10" CLUTCH DISC FROM B18 A.W. FRICTION LOOP DEPTH DRIVE 6 LB. FT. OVER-RUN 10 LB. FT. OVER-RUN DRIVE TORQUE LB. FT. B18AW HAS A FULLY FLOATING REAR AXLE. IN TOP GEAR (OVERDRIVE) RATTLE OCCURRED AT 22-28 MPH PEAKING AT 25. IT WAS BAD. DEFLECTION - DEGREES TEST BY Rm{William Robotham - Chief Engineer} / Cb | ||