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).
Design specifications for the rear springs on the Bentley 111.
| Identifier | ExFiles\Box 100\1\ scan0203 | |
| Date | 28th October 1938 | |
| BY c. Rm.{William Robotham - Chief Engineer} c. Da.{Bernard Day - Chassis Design} c. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. Da{Bernard Day - Chassis Design}/JD.{J. Draper - Frames} c. BY/NS.{Norman Scott} c. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. Da{Bernard Day - Chassis Design}/TWD.{T. W. D???Aeith} BENTLEY 111. REAR SPRINGS. In accordance with memo BY.2/G.27.10.38. that we shall not fit built-in jacks on Bentley 111, we are working on the following lines in conjunction with Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} The rear spring to be a Toledo Woodhead grooved interleaved type, with a 3/8" diameter centre bolt. Spring to have .500 negative camber, 3.500 of bump and 6.000 of controlled rebound, the total deflection to be left in abeyance. We are designing a 3.500 long rear shackle similar to F.CD.912, but with no extension for the portable jacks, as we intend to anchor them on the rear bump bracket and dumb iron, which is fitted on the end of the frame. We wish to use the front anchorage bracket 1.500 below the level top of frame and not the 2.750 below, as shewn on F.CD.922. With the above spring dimensions, we believe that D.W.S. portable hydraulic jack with 15.000 of lift should be sufficient. Would Rm{William Robotham - Chief Engineer}/Grys. get in touch with the D.W.S. jack people, with a view to obtaining a jack with 15.000 extension, as the jacks in our possession have only 13.625. DA.{Bernard Day - Chassis Design} | ||