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 specifications of the Wraith II steering ball joint.
| Identifier | ExFiles\Box 9\7\ 07-page007 | |
| Date | 6th July 1936 | |
| To-Ev.{Ivan Evernden - coachwork} Copy to Dr. R.H.O. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Ma/Rm.{William Robotham - Chief Engineer} X1249 E/Ev.{Ivan Evernden - coachwork}1/MN.6.7.36. 65 F.J. Hardy Wraith II Steering Ball Joint. We have already sent to you the geometry which determines the length of the cross steering tubes on Wraith II. On N.Sch.4849 herewith we show the design of the cross steering tube ball joints, both inner and outer ends. The spring load on the balls to provide friction has been fixed at 200 lbs., and the lower ball pad is prevented from turning by having a saw cut through one side, whereby allowing the spring load to expand the pad into its housing. Ev.{Ivan Evernden - coachwork} Att: N.Sch.4849. | ||