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).
Wisp induction system, recommending the adoption of a Vauxhall-style hot-spot for rapid warming.
| Identifier | ExFiles\Box 159\5\ scan0098 | |
| Date | 19th November 1940 | |
| Ev.{Ivan Evernden - coachwork} from Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Rm.{William Robotham - Chief Engineer}7/ML.19.11.40. WISP INDUCTION SYSTEM. Of all the small cars we have recently tried, there is no doubt that the Vauxhall is far and away the best for rapid warming up. This must, to a certain extent, be attributed to the type of thermostatically controlled unbalanced hot spot that they use, because they do not have any under-bonnet temperature control. On the Wisp, therefore, which has the exhaust and inlet on the same side, we should reproduce as far as possible, the Vauxhall hot-spot set-up. Rm.{William Robotham - Chief Engineer} | ||