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).
Experimental results and proposed design changes for the Bentley III steering system, specifically regarding camber and caster angles.
| Identifier | ExFiles\Box 100\2\ scan0071 | |
| Date | 14th September 1938 | |
| 450 To Da.{Bernard Day - Chassis Design} from Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} [strikethrough]o.{Mr Oldham} HPS.{Horace Percy Smith - Experimental Factory Mgr}[/strikethrough] c. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}10/MH.{M. Huckerby}14.9.38. BENTLEY III STEERING. 79/6 Re Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}1/MH.{M. Huckerby}13.9.38. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}2/MH.{M. Huckerby}13.9.38. Rm.{William Robotham - Chief Engineer} and Gry.{Shadwell Grylls} have tried 7.B.V. with both ¾° and 1¼° position camber, and agree that the further increase gives a desirable improvement in directional stability with-out making the steering too heavy. We therefore wish to make a compromise and have 1¼° of positive caster. It has been suggested that yokes could be designed for 1° caster which could give an alternative of plus or minus ¼° variation in machining possible off the same forging. Will you please alter the designs accordingly and instruct both ¾° and 1¼° angles experimentally. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||