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).
Revision to the Spectre gearbox speedometer drive.
| Identifier | ExFiles\Box 94\1\ scan0055 | |
| Date | 1st November 1934 | |
| 4444 328 To BY.{R.W. Bailey - Chief Engineer} Copy to Wor.{Arthur Wormald - General Works Manager}T.E. Ms. Da.{Bernard Day - Chassis Design} RHS. ------------------ HDY.{William Hardy}2/MN.1/11/34. ------------------ SpectreCodename for Phantom III Gearbox. N. Scheme 4251 shows the speedometer drive revised to suit the new axle ratios of 8/34 (4.25 : 1). We have reduced the driving gear by one tooth more than corresponds to the change of axle ratio in order to use the same piece as for the Wraith. The aluminium piece which is the bearing for the gear can also be identical on both the Wraith and the SpectreCodename for Phantom III. HDY.{William Hardy} | ||