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).
Confirming the use of B.V. yokes on car 4.B.50 for a narrow front track.
| Identifier | ExFiles\Box 111\4\ scan0130 | |
| Date | 4th March 1939 | |
| 800a To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c.c. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}8/MH.{M. Huckerby}4.3.39. 4.B.50. Confirming our conversation with WSC.{W. S. Cassel} it will be in order to use B.V. yokes on 4.B.50 thereby giving the car narrow front track, and the wings will be made to suit. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||