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).
Trial of high Brinell surface hardness for steel housings in Spectre and Wraith gearboxes.
| Identifier | ExFiles\Box 94\1\ scan0070 | |
| Date | 7th December 1934 | |
| x4604 328 To EY. and RHC.{R. H. Coverley - Production Engineer} from HDY.{William Hardy} [Handwritten initials: RM{William Robotham - Chief Engineer}] HDY.{William Hardy}1/HP.7.12.34. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Ds. SpectreCodename for Phantom III and Wraith Gearboxes. With regard to the steel housings in the box for the ball bearings which carry the sliding rod for the 2nd speed, Mr Cockshott has suggested that in view of the light loads on these, a high Brinell surface hardness may be all that is necessary. We agree that this should be tried, and suggest that say two of the SpectreCodename for Phantom III boxes about to be made should have pieces so treated. HDY.{William Hardy} | ||