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 modifications to the Wraith gearbox based on schematics 4488 and 4494.
| Identifier | ExFiles\Box 8\11\ 11-page016 | |
| Date | 17th May 1935 | |
| GRY{Shadwell Grylls} Light 6.28 To EY. from HDY.{William Hardy} SECRET. HDY.{William Hardy}2/HP.17.5.35. C. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} PHO. RM{William Robotham - Chief Engineer} Wraith Gearbox. Herewith are N. Sch's 4488 and 4494 which bring this gearbox into line with what has been recently done on the SpectreCodename for Phantom III gearbox. N.Sch.4488 shows a plate friction device for the servo arm, a duralumin balance arm and an inspection cover for the 1st and 2nd speed actuating gear. N. Sch.4494 shows modifications to the actuating mechanism to compensate for the shortened gear lever which will be required with a horizontal hand brake lever, increased leverage of 1st speed operation and the 1st speed actuating lever modified for easier assembly. HDY.{William Hardy} N.Sch.4488 and N.Sch.4494 herewith. | ||