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).
Material choice and testing of a steering control quadrant for the Wraith model.
| Identifier | ExFiles\Box 9\7\ 07-page042 | |
| Date | 10th March 1937 | |
| WRAITH To L. from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. Hs.{Lord Ernest Hives - Chair} c. By.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} c. Ev.{Ivan Evernden - coachwork} c. O/Mr.Naylor. 650 STEERING CONTROL QUADRANT - WRAITH. In connection with the proposal to use die cast aluminium for the steering control quadrant with the ratchet teeth cut or cast in the alum., we have carried out a test to determine whether the teeth are likely to wear out. The test consisted of 5 hours continuous use of the ignition control in a normal manner with a quadrant made of forged aluminium. At the end of this test the teeth were badly worn, and the lever could easily be dragged over them by operating the controls from the lower end of the steering column. We consider that the teeth should be formed in a steel ring cast into the alum. quadrant. We can see no possible objection to the use of mild steel for the control quadrant holder, and we suggest that this should be standardised on Ph.III. and 25/30. without awaiting a 15,000 mile test. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||