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).
Data sheet detailing clutch specifications for the Phantom III revised clutch.
| Identifier | ExFiles\Box 93\3\ scan0255 | |
| Date | 30th January 1937 guessed | |
| Clutch Data Phantom III Revised Clutch.(Cont'd). Position of levers of N.Sch. 5000. | .110 Plate Separation. | .092. Plate Separation. Total Clutch Spring Loads. Engaged (New). lb 1 1892 1648 Fully out (New). lb 3 1852 Engaged (Worn, Pedal right back before first adjustment. lb 2 1608 1524 Engaged (Fully worn). lb 4 1613 % Reduction in Load due to wear. 7.5% Pedal Plate Loads. Engaged (New). lb. 1 29.5+2.7X=32.2 25.1+2.7X=27.8 Fully out (New). lb 3 36.1+4.8X=40.9 29.4+4.8X=34.2 Engaged (Worn, Pedal right back before first adjustment) lb 2 27.6+2.3X=29.9 23.8+2.3X=26.1 Engaged (Fully worn) lb 4 25.5+2.3X=27.8 21.8+2.3X=24.1 X Load due to Pull Off Spring. Outside diameter of linings. 13.5 Intensity of pressure on Linings (New). ins. lb/□ 1 19.0 Coefficient of friction on Linings (New). 1 .200 Coefficient of friction on Linings (Fully worn). 4 .217 Max. Torque. lb ins. 3700. | ||