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).
The Wraith gearbox, discussing associated drawings, servo drive comparisons, and high ratio gears for Bentley.
| Identifier | ExFiles\Box 8\11\ 11-page001 | |
| Date | 5th September 1934 | |
| To BY.{R.W. Bailey - Chief Engineer} from HDY.{William Hardy} c. Wer E.{Mr Elliott - Chief Engineer} Ha. De. RHC.{R. H. Coverley - Production Engineer} [Handwritten, crossed out text] XXXX [Handwritten] 628 HDY.{William Hardy}3/HP.5.9.34. Wraith Gearbox. ----------------- Herewith are N. Sch's 4171 and 4172 which show the rear half actuating gear, servo and speedometer drive and the necessary views of the rear half casing. The servo worm drive is practically the same as for the Peregrine and the maximum outside diameter of servo that can be used is 5.35 against the 20/25 5.55. We shall be sending high ratio gears for this box when used on the Bentley. HDY.{William Hardy} | ||