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).
Attempts to quieten Bentley axle over-run noise at 40 M.P.H.
| Identifier | ExFiles\Box 102\4\ scan0146 | |
| Date | 26th November 1937 | |
| To Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} BENTLEY AXLES - QUIETENING OVER-RUN AT 40 M.P.H. We have been trying to confirm the original success in curing the 40 m.p.h. overrun noise by preloading the bearing but in every case, so far, we have been unable to affect the noise, Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} agrees with this. It is important that we should be convinced in this matter as it affects Bentley III axle designs. Will you please arrange a demonstration as we mentioned before. The writer will want to try the car before and after the bearing is altered. If more than one case can be demonstrated so much the better. Would Wednesday or Thursday of next week do? [Stamped] Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} [Handwritten signature] | ||