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 speedometer drive, stating that reversing its rotation would necessitate a costly design alteration.
| Identifier | ExFiles\Box 165\2\ img298 | |
| Date | 4th December 1940 | |
| To Ev.{Ivan Evernden - coachwork} from Rm{William Robotham - Chief Engineer}/EC. C. to Ev{Ivan Evernden - coachwork}/Tln. Rm{William Robotham - Chief Engineer}/H.{Arthur M. Hanbury - Head Complaints} Elec. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}5/ET.4.12.40. Re: SPEEDOMETER. Further to our memo Rm{William Robotham - Chief Engineer}/RC.{R. Childs}2/ET.18.11.40 regarding the reversal of the rotation of the speedometer drive, it follows that the direction in which the indicating hand moves must also change since it is purely governed by the rotating magnet. To change the direction of rotation of the drive without that of the hand would involve a rather costly alteration in the design of the instrument. Rm{William Robotham - Chief Engineer}/EC. | ||