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 design modifications for the Thumper engine for the Myth car and suggesting investigation into the Wisp project.
| Identifier | ExFiles\Box 109\3\ scan0022 | |
| Date | 5th October 1940 | |
| Inr. from Rm.{William Robotham - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} file Myth THUMPER ENGINE FOR MYTH. Rm.{William Robotham - Chief Engineer}7/ML.5.10.40. 700 This is to confirm that you will complete the design modifications necessary to the thumper unit, to enable it to go into the Myth car, before proceeding with other work. In the meantime, I suggest that Rm{William Robotham - Chief Engineer}/TAS{T. Allan Swinden} could very profitably investigate some of the problems which we are going to encounter on the Wisp. Rm.{William Robotham - Chief Engineer} | ||