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).
Accelerator movements and suggesting alterations to the 'EAC' controls.
| Identifier | ExFiles\Box 68\1\ scan0301 | |
| Date | 1st April 1925 | |
| X8470 To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c.c. to BY.{R.W. Bailey - Chief Engineer} c.c. to DA.{Bernard Day - Chassis Design} SECRET. 'EAC' - CONTROLS. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG22.4.25. X.8240 X.8080 X.8470 We have laid out the respective accelerator movements of the EAC. and 40/50. HP. As will be observed from the attached sketches, the movement of the former for full throttle is 75% greater than the latter. A 3.5" movement is most uncomfortable from the average drivers point of view. Experimentally, lever 'C' has been reduced to .75" long, this improves matters but makes the lever very short and working under a considerable load, as the exhaust butterfly closing spring throws an extra strain on all levers but those on the carburetter. We suggest that altering the length of lever E.71688 from 1.5" to 2.1" would give a more reasonable movement for the E.A.C. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||