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 fix overrun axle noise on Bentley cars by pre-loading the pinion bearing.
| Identifier | ExFiles\Box 84\4\ scan0343 | |
| Date | 16th November 1937 | |
| 202 W/K.{Mr Kilner} 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} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}3/AP.16.11.37. BENTLEY AXLES. We have been attempting to confirm that it is possible to reduce the overrun axle noise at 40 m.p.h. on Bentley by pre-loading the pinion bearing, but so far we have been unable to make any difference to the noise by any alteration to the bearing. Our tests have consisted of trying from 0.002" slack to 0.005" preload on the bearings of 3 cars. Will you please send us some more particulars of what you do to customers axles to effect a cure and also tell us whether the remedy always works. If you are visiting Derby in the near future we would like you to try your cure on one of our cars. If you do not intend to visit Derby within a week, can you arrange to demonstrate your cure to the writer at Kingsbury.? Partic-ulars of date and time of demonstration would be welcome. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||