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).
Trial and implementation of a direct governor control butterfly throttle.
| Identifier | ExFiles\Box 66a\3\ scan0040 | |
| Date | 29th January 1925 | |
| To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 48140 Hs{Lord Ernest Hives - Chair}/Rml/LG29.1.25. DIRECT GOVERNOR CONTROL BUTTERFLY THROTTLE. We should like, if possible, to give this arrangement a fair trial, as it was reasonably satisfactory as rigged up on 93-NK. The exhaust system on this car as arranged at present, will not allow the operating rod to come squarely from the butterfly spindle. We consider that it might be worth while altering the down pipe, unless the scheme can be fitted up on 44-PK car. We should like this governor to have a 50° range of control on the throttle, if this is practicable, and the butterfly throttle return spring to be rigged up with an initial tension of 3¾ lbs. and a toggling action approximating to the attached sketch. In addition, as the cam will be eliminated, it is essential that the butterfly spindle and all the bearings between the governor and the throttle, should be as free as possible. At the present moment, the hand control cannot be operated with the accelerator connected up. We should like this altering, if it is feasible. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||