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).
Cover note for instructions on how to change over Wraith coils.
| Identifier | ExFiles\Box 109\5\ scan0016 | |
| Date | 9th March 1938 | |
| 664. Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}9/R.9.3.38. CHANGING OVER WRAITH COILS. With reference to your enquiry over the telephone this afternoon, attached is a description of how to change over from one coil to another. Rm.{William Robotham - Chief Engineer} | ||