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 and Spectre models.
| Identifier | ExFiles\Box 93\3\ scan0029 | |
| Date | 14th March 1935 | |
| 14.3.35. CLUTCH DATA. PHANTOM AND SPECTRECodename for Phantom III. Position of Phantom. SpectreCodename for Phantom III Levers on N.Sch's N.Sch.4412. 4229 to 4404. Pedal Travel (Measured along chord at centre of Pedal Plate. Engaged (New) to Fully Out 1 to 3 4.9" 5.0" " (Worn,pedal right back) to Fully Out. 2 to 3 5.687" 5.775" Pedal Movement taking up wear. 1 to 2 .800" .787" Plate Separation. Engaged (New) to Fully Out. 1 to 3 .092" .092" Allowance for wear without adjustment of pedal. 1 to 2 .015" .015" Engaged (Pedal Right back) to Fully Out. 2 to 3 .107" .107" Total Lining wear permitted. 1 to 4 .150" .125" Thickness of Linings. .250" .125" Cushioning. .005 plus 10. .015-5 Leverage, Pedal to Plate. Engaged, New. 1 54.2 55.5 Fully Out. 3 51.3 52.6 | ||