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).
Revised and simplified design for the Spectre clutch.
| Identifier | ExFiles\Box 93\3\ scan0011 | |
| Date | 29th October 1934 | |
| Rm{William Robotham - Chief Engineer} 4694 3/2 To: Mr. [REDACTED] Copy to Mr. [REDACTED] Hs.{Lord Ernest Hives - Chair} ---------------- DA{Bernard Day - Chassis Design}/2/MN.29/10/34. SpectreCodename for Phantom III - Clutch. Herewith is N Sch.4229 showing the design of single plate clutch revised to eliminate the flexible centre & the spring back-plate, and also to incorporate one or two simplifications in the design. One thing we have not done is to provide a sheet metal pressed cover plate, as on 20/25 and Bentley. The reason for this is that diameter of the driven plate is so important on this high-torque clutch that we have not felt justified in sacrificing any of it so as to use a sheet metal cover-plate, so we have retained the steel forging but lightened and somewhat simplified. The corresponding reduced outer casing is following in a short time. DA.{Bernard Day - Chassis Design} | ||