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).
The mechanics of a throttle controlling spring, butterfly throttle, and governor control.
| Identifier | ExFiles\Box 66a\3\ scan0042 | |
| Date | 11th February 1925 guessed | |
| contd :- -2- required from the controlling spring to open the throttle through 40°, even when the governor is not in operation. The actual couple required to start closing the butterfly throttle from the 40° position, is rather less than that at small throttle openings. The ideal position would therefore be to obtain a slightly decreasing load from the throttle closing spring as the angular movement of the butterfly increases, to compnesate for the steadily increasing mechanical advantage of this spring over the operating camshaft. We should like xx you to go into this point as we think that if the difficulty can be satisfactorily cleared up, the 40° cam which you have given us would provide a satisfactory governor control. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||