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).
Wheel driver failure on the PH.III rear axle and a recommendation for a material change.
| Identifier | ExFiles\Box 92\5\ scan0146 | |
| Date | 28th August 1937 | |
| 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. Hdy.{William Hardy} 302 Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}8/AP.28.8.37 PH.III. REAR AXLE We have experienced a failure of the wheel driver on 32-EX. running in France. The failure was in the radius between the flange and the hub. The material of this particular driver was S/ZNX, whereas those on Production are S/N. We recommend that as soon as material is available, the drivers on Production should be made of S/ZNCR, regardless of scrap. The object of this is to lessen the chance of failure on a customer's car, such as is taking place on Bentley chassis at the moment. The design of driver like that on Wraith will be running on the next Ph.III. to go to France, but this cannot be fitted to customers' cars of the present type as it necessitates new axle tubes. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||