Experiment on the Wraith gearbox overdrive and the potential elimination of the centre bearing.
| Identifier | ExFiles\Box 99\4\ scan0277 | |
| Date | 2nd March 1939 | |
| 4.28 To By. {R.W. Bailey - Chief Engineer} from Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} c. Da. {Bernard Day - Chassis Design} c. Da {Bernard Day - Chassis Design} /Hdy. {William Hardy} c. Da {Bernard Day - Chassis Design} /Ev. {Ivan Evernden - coachwork} Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} 6/MH. {M. Huckerby} 2.3.39. B.V. GEARBOX. As a result of the trial of the Wraith gearbox in 7.B.V., during which we were surprised to find that the overdrive was far from silent, we rigged this car up with a straight through propellor shaft eliminating the centre bearing. The result of this experiment was a considerably improved overdrive. We have asked Da. {Bernard Day - Chassis Design} whether he thinks it would be possible to do away with the centre bearing on cars having the new frame, because although we think it would be possible on the shortest, we doubt whether it could be done on the B.50 or Silver Wraith. Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} | ||
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).