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 specifications for the revised clutch of the Phantom III model.
| Identifier | ExFiles\Box 93\3\ scan0254 | |
| Date | 28th January 1937 | |
| 312 28th January 1937. CLUTCH DATA. PHANTOM III - REVISED CLUTCH. N.Sch's 4998, 4999, 5000, 5004, 5008. | | Position of levers of N.Sch. 5000. | .110 Plate Separation. | .092 Plate Separation. | |---|---|---|---| | **Pedal Travel.(Measured along chord at centre of Plate Plate.** | | | | | Engaged (New) to Fully Out. | 1 to 3 | 6.000 | | | Engaged (Worn,Pedal right back) to fully out. | 2 to 3 | 6.900 | | | Pedal Movement taking up wear. | 1 to 2 | .925 | | | Radius to centre of pedal plate. | | 13.125 | | | **Plate Separation.** | | | | | Engaged (New) to fully out. | 1 to 3 | .110 | .092 | | Allowance for wear without adjustment of pedal. | 1 to 2 | .018 | .016 | | Engaged (pedal right back) to fully out. | 2 to 3 | .128 | .108 | | Total lining wear permitted | 1 to 4 | .056 | | | Thickness of linings. | | .125 | | | Cushioning. | | .040+5 | | | **Leverage, Pedal to Plate.** | | | | | Engaged (New). | 1 | 56.0 | 65.6 | | Fully out. | 3 | 52.4 | 63.2 | | Pedal right back,before first adjust. | 2 | 58.3 | 67.9 | | Linings fully worn (Pedal Travel / Plate Separation) | 4 | 59.8 | 69.9 | | Average Leverage. | 1 to 3 | 54.6 | 65.2 | | Leverage from length of levers. | | 50.3 | 60.0 | | ||