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).
Gearbox noise issues in the B.V. car, comparing the B.50 box with a Wraith overdrive box.
| Identifier | ExFiles\Box 99\4\ scan0192 | |
| Date | 23th February 1939 | |
| 428 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. Hs.{Lord Ernest Hives - Chair} c. Da.{Bernard Day - Chassis Design} c. Da{Bernard Day - Chassis Design}/Hdy.{William Hardy} c. RHC.{R. H. Coverley - Production Engineer} c. HPS.{Horace Percy Smith - Experimental Factory Mgr} GEARBOX FOR B.V. Our two worries with the B.50 box have been the noisy spur first speed and also an insufficiently silent overdrive. We have now tried a Wraith overdrive box in 7.B.V. First speed is, of course, very quiet. Overdrive and 2nd. are little if any better than the best B.50 box. It appears that a B.V. car is worse for gear noise than a Wraith. We have already instructed a helical first speed for the B.50 box. In view of the results on 7.B.V. we think there is very little chance now of not using the new box for B.V. production. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||