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).
Increase in diameter for the Wraith II back axle shafts, referencing the Phantom III design.
| Identifier | ExFiles\Box 7\3\ X 602 Axle Rear-page31 | |
| Date | 16th December 1926 | |
| L.E.Smith. 10-AUG. 602 Please discuss Rm{William Robotham - Chief Engineer} HPS.{Horace Percy Smith - Experimental Factory Mgr} O.W. E.{Mr Elliott - Chief Engineer} De. Ev.{Ivan Evernden - coachwork} Rm.{William Robotham - Chief Engineer} E/HDY.{William Hardy}1/HP.16.12.26. Wraith II Back Axle. It has been decided that the axle shafts for the Phantom III back axle applied to this car shown by N.Sch.4944 are to be increased in diameter from 1.100 to 1.312". We shall be sending a drawing of the new shafts, but in the meantime will you kindly do whatever can be done to enable this alteration to be made to the first shafts. If they have gone too far to be altered they should be completed, but in this case further shafts will have to be made having the increased diameter. E/HDY.{William Hardy} | ||