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 ball bearing and shaft fitting.
| Identifier | ExFiles\Box 93\3\ scan0053 | |
| Date | 6th June 1935 | |
| 4312 To EY. from HDY.{William Hardy} c.c. Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} RHC.{R. H. Coverley - Production Engineer} SECRET. HDY.{William Hardy}1/HP.6.6.35. SpectreCodename for Phantom III Clutch. With reference to the ball bearing in the flywheel for the front end of the clutch shaft (E.86186) would you kindly delete the endwise freedom which is at present provided by means of parallel portions of the race ways and make the bearing entirely standard. The bore of the bearing should be a free sliding fit on the shaft as for the bearing at the rear end of the shaft to our N/Sch.4491 which likewise need have no special endwise clearance in the bearing as neither has any influence on the clutch disengagement. HDY.{William Hardy} | ||