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).
Vacuum ignition control for the Wraith III model, referencing drawing LeC.5756.
| Identifier | ExFiles\Box 6\6\ 06-page249 | |
| Date | 30th June 1937 | |
| SECRET. File 600 WYMAN Will this suit Wraith? By: c. Rm.{William Robotham - Chief Engineer} HFS. Rm{William Robotham - Chief Engineer} Yes E/JNR.{Charles L. Jenner}1/HP.30.6.37.Rm{William Robotham - Chief Engineer} Vacuum Ignition Control - Wraith III. Please receive herewith:- LeC.5756 showing the vacuum ignition control arranged to suit the R.R. distributor. E/JNR.{Charles L. Jenner} | ||