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).
Modifications to the Spectre Clutch Operation to reduce cost and improve accessibility.
| Identifier | ExFiles\Box 93\3\ scan0037 | |
| Date | 24th April 1935 | |
| X312 SECRET. To-BY.{R.W. Bailey - Chief Engineer} from HDY.{William Hardy} HDY.{William Hardy}1/HP.24.4.35. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} RHC.{R. H. Coverley - Production Engineer} Sft.{Mr Swift} SpectreCodename for Phantom III Clutch Operation. N. Sch.4447 herewith shews various modifications to the clutch operation to reduce cost and to improve accessibility. The modifications are:- (1) The use of open ended outer races for the needle roller bearings as suggested for the Wraith in Sft.{Mr Swift}1/BH.27.2.35. It is not necessary to prevent the outer races from rotating and accordingly the methods we show to locate them endwise appear to be the cheapest and most convenient for assembly as the races have only to be driven in without regard to their rotational position. (2) Operating shaft and levers in one forging machined only where necessary, as suggested in the above memo. (3) Even pressure on the thrust bearing is secured by a universal ring as for the Wraith. (4) The operating shaft centre is raised to reduce deflection, weight and cost. (5) The projection of the operating shaft beyond the casing is reduced and the casing halves can now be assembled without the removal of the studs referred to in RHC.{R. H. Coverley - Production Engineer}2/MS.8.4.35. (6) The flat type thrust bearing appears to be unsuitable now that we relieve this bearing of all load by pulling the pedal against the floorboard when the clutch is not in use. Consequently we ask for a deep groove bearing for this duty. We recently reverted to the flat type bearing because of the noise made by the bearing then in use which was a Shatz type. Messrs. Borg and Beck recommend the use of the deep groove journal bearing. | ||