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).
The cost savings and design modifications for the Phantom III revised clutch.
| Identifier | ExFiles\Box 93\3\ scan0300 | |
| Date | 8th April 1937 | |
| 312. E/Lid.{A. J. Lidsey}1/HP.8.4.37. Phantom III Revised Clutch. The cost of the revised clutch has been investigated by C/Rb{R. Bowen}, as compared with the present standard Phantom III clutch. The revised design which incorporates a spring centre will show a saving of approximately £6.0.0 per car; in the event of the spring centre being found unnecessary and replaced by a solid centre this saving would be increased by a further £1.1.6 per chassis. The revised design incorporates several improvements and cheapening modifications including the following:- (1) Starter gear ring integral with flywheel. (2) Wider friction surfaces. (3) Reduced number of operating fingers. (4) " " " clutch springs. (5) Cheapened nose bearing. (6) Cheapened operating mechanism. (7) Ventilated clutch. (8) Increased pedal leverage. /Lid.{A. J. Lidsey} | ||