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).
Correcting a report on gearbox failures, specifically regarding the failed components and part numbers.
| Identifier | ExFiles\Box 136\2\ scan0326 | |
| Date | 2nd May 1941 | |
| 1153 To Rm.{William Robotham - Chief Engineer} from Ev{Ivan Evernden - coachwork}/Tln. c. to Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} (crossed out) c. to Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} (crossed out) c. to Rm{William Robotham - Chief Engineer}/HH. (crossed out) c. to Ev.{Ivan Evernden - coachwork} (crossed out) SECRET. Ev{Ivan Evernden - coachwork}/Tln.2/JH.2.5.41. P.S. to Ev{Ivan Evernden - coachwork}/Tln.8/JH.1.5.41. re Gearbox Failures shewn on Photographs Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}4/ET.19.1.41. We have just been told that the headings on these photographs are not correct and consequently some parts of our report are invalid. It is not a first speed wheel which has failed at 300 miles on 4.B.50. but second speed dogs. It is not second speed dogs that have failed at 11,820 miles on 30.G.VII. but a first speed wheel tooth. This rather modifies our impressions; first speed teeth are not failing quite so quickly as the titles on the photographs suggest, and the second speed dogs we have designed but which are not being tested now appear very necessary. The piece number of the 1st. speed wheel off 1.B.V. gearbox is GB.4850 not GB.4580 as quoted on the photograph. Tln. Ev{Ivan Evernden - coachwork}/Tln. | ||