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 compression test on a 10 C.F. clutch disc.
| Identifier | ExFiles\Box 130\3\ scan0150 | |
| Date | 30th December 1940 guessed | |
| COMPRESSION TEST ON 10 C.F. CLUTCH DISC. PRESSURE PLATE LOAD LB. 2000 1800 1600 1400 1200 1000 800 600 400 200 0 DEFLECTION - INCHES. .005 .010 .015 .020 TOTAL LOAD AT 3500 RPM. SPRING LOAD GRAPH N°1 Rm.{William Robotham - Chief Engineer} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} B. 4/170. | ||