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).
Request to arrange a green light indicator for gear changes, activated by the governor weights at a specific RPM.
| Identifier | ExFiles\Box 159\5\ scan0187 | |
| Date | 21th April 1941 | |
| Rm{William Robotham - Chief Engineer}/RC.{R. Childs} from Rm.{William Robotham - Chief Engineer} Instructions to Shop Rm.{William Robotham - Chief Engineer}18/ML.21.4.41. 1373 Will you please arrange a green light scheme so that when the governor weights start to open a green light shines in the driver's cabin and tells him when to change gear. We anticipate that the governor weights may start to open between 2,300 and 2,400 r.p.m. p.p. Rm.{William Robotham - Chief Engineer} | ||