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 Gearbox selector lock housing to save cost and weight.
| Identifier | ExFiles\Box 94\1\ scan0049 | |
| Date | 24th October 1934 | |
| 4444 328 To BY.{R.W. Bailey - Chief Engineer} from HDY.{William Hardy} HDY.{William Hardy}5/HP.24.10.34. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Ba. RHC.{R. H. Coverley - Production Engineer} GRY{Shadwell Grylls} SpectreCodename for Phantom III Gearbox. We should like the selector lock housing for this box brought into line with that for the Wraith to save cost and weight, as we show on N. Sch.4234 herewith. Will you kindly note that the counterboring of the selector rod bores is important as it reduces the accuracy of alignment necessary to avoid binding and also reduces the oil drag. A radius on the ends of the interlock pin will ensure that the counterbore does not trap the pin. This housing is intended for the third box but we should be glad if RHC.{R. H. Coverley - Production Engineer} would add the counterbores and radiused pin ends to the pieces for the second box now building. HDY.{William Hardy} | ||