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).
Modifications to the controlling rheostat and brush load on specific car heaters.
| Identifier | ExFiles\Box 137\2\ scan0007 | |
| Date | 19th January 1938 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Std. c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Handwritten: 1158 also Y 200a Rm{William Robotham - Chief Engineer}/Std.7/MH.{M. Huckerby}19.1.38. CAR HEATERS, 6.B.IV, [REDACTED], & 28.G.VI. Will you please modify the controlling rheostat of the car heater on 6.B.IV so that there is no resistance in circuit in maximum spedd position, and also reduce the brush load in order to reduce the motor stiffness (as discussed with T.Tooby). Will you please make these modifications as soon as possible to the heaters fitted to [REDACTED] and 28.G.VI while they are in the garage. Rm{William Robotham - Chief Engineer}/Std. | ||