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).
Modifications to the Phantom III steering box for Wraith II wheel movement, specifically regarding the cross bolt.
| Identifier | ExFiles\Box 9\7\ 07-page041 | |
| Date | 9th March 1937 | |
| SECRET To BY.{R.W. Bailey - Chief Engineer} Copy to [text crossed out] RM{William Robotham - Chief Engineer}/ROY.{Sir Henry Royce} E/Ev.{Ivan Evernden - coachwork}4/WN.9.3.37. 650 Phantom III Steering Box for Wraith II Wheel Movement. You will no doubt have heard that it is desired to delete the serrations on the cross bolt in the rocker shaft of the Phantom III steering which forms the bearing for the cam roller. Because the nut of the bolt has to be filed in order to clear the cam it is necessary that another means be provided for preventing the bolt from turning. On LeC.5556 herewith we show a bolt having a snug on its head to achieve this purpose. It is imperative that the position of the drilling for the split pin be indexed as shown relative to the position of the snug on the bolt head. Ev.{Ivan Evernden - coachwork} Att:LeC.5556. | ||