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).
Design differences between the Wraith and Spectre gearboxes, referencing specific schematics.
| Identifier | ExFiles\Box 8\11\ 11-page002 | |
| Date | 20th September 1934 | |
| x4209 628 To [redacted] from HDY.{William Hardy} HDY.{William Hardy}1/HP.20.9.34. c.c. [redacted] Wraith Gearbox. ---------------- Herewith are N. Sch's 4162 and 4163 which show the actuating mechanism, casing and suspension of the front half of this box. There are various small differences between these designs and those for the SpectreCodename for Phantom III and we shall be writing to ask that in the case of some of these, the SpectreCodename for Phantom III box be brought into agreement. HDY.{William Hardy} | ||