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 plotting the results of a torsional deflection test on a 10 inch clutch disc.
| Identifier | ExFiles\Box 99\1\ scan0103 | |
| Date | 27th June 1941 | |
| TORSIONAL DEFLECTION TEST ON 10" CLUTCH DISC FROM B18AW. FRICTION LOOP DEPTH DRIVE 6 LB. FT. OVER-RUN 10 LB. FT. TORQUE LB. FT. DEFLECTION - DEGREES. DRIVE OVER-RUN B18AW HAS A FULLY FLOATING REAR AXLE. IN TOP GEAR (OVERDRIVE) RATTLE OCCURRED AT 22-28 MPH PEAKING AT 25. IT WAS BAD. TEST BY R.m / C.B. Rm{William Robotham - Chief Engineer} / C.B. 27/6/41 | ||