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 and mounting of the steering box for the Wraith 11 model.
| Identifier | ExFiles\Box 9\7\ 07-page001 | |
| Date | 3rd April 1936 | |
| To BY.{R.W. Bailey - Chief Engineer} Copy to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Dev. RHG. x4044 E/Ev.{Ivan Evernden - coachwork}1/MN.3.4.36. F.T.H [Signature] Rm{William Robotham - Chief Engineer} Any comments [Signature] Rm{William Robotham - Chief Engineer} WRAITH 11. Steering Box and Mounting. We send herewith N.Sch. 4789 showing the steering box and its mounting for Wraith 11. The position of the steering box relative to the dash is fixed on Lec 5032. The box casing is a single piece malleable iron casting, and is provided with a steel inner sleeve having .031" eccentricity, enabling the cam to be fed directly into the wheel for adjustment. A vernier marking is provided for the cam and wheel adjustment. It is intended that preloading shall be done only on the cam wheel by means of the washers provided. In the case of the cam, we have used a standard Timken steering box and bearing, but with special square ended taper rollers, as it is understood that more friction is required than the normal steering box Timken roller will provide. On the rocker shaft we have provided standard Timken steering box bearings with standard rollers. The pendulum lever has a materially stiffened section from those previously used, and the design of the side steering tube subsequently to be sent to you will show the set of the ball pin relative to the axis of the rocker shaft, to allow for the angularity of the side steering tube with the longitudinal axis of the car. The whole of the details for the design of this steering box have been produced in accordance, and in close co-operation with the Expl. Department. With respect to the mounting, the column can assume its various angular positions for the different steerings by rotating around the tube, and the transverse adjustment to enable the box to line up with the fixing on the dash board is obtained by sliding the latter transversely on the suspension tube. The aluminium die-cast distance piece in the frame is placed in a side channel and fastened prior to the welding-on of the outer plate, after which the drilling and reaming is done, with the bracket carrying the steering box in position. | ||