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).
Secret memo detailing design updates to the Spectre Clutch, referencing schemes N.Sch.4578 and N.Sch.4507.
| Identifier | ExFiles\Box 93\3\ scan0057 | |
| Date | 8th August 1935 | |
| Handwritten: Rm{William Robotham - Chief Engineer} Gry{Shadwell Grylls} +312 To EY. from HDY.{William Hardy} SECRET. HDY.{William Hardy}1/HP.8.8.35. c. Wer. E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Ba. FHS. SpectreCodename for Phantom III Clutch. We send herewith N.Sch.4578 which shows the ball bearing replaced in the clutch casing for the support of the rear extension of the crankshaft. An "Oilite" bush is used to carry the clutch shaft as now on test in France on 3-S-1. Lubrication arrangements are exactly as on 3-S-1. This scheme also shows the clutch plate carried only on the castellions with the object of improving the smoothness of action. The castellions are unaltered from those shown in N.Sch.4507 except as regards length. HDY.{William Hardy} N.Sch.4578 herewith. | ||