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).
Engine governor control issues, throttle problems, and resulting explosions or gurgles.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan031 | |
| Date | 7th October 1926 guessed | |
| -2- Contd. (b) If the governor controls are set correctly and work freely there is no possibility of the governor opening the throttle or preventing it from closing at speeds above three to five miles per hour in excess of the speed at which the governor lever on the quadrant is set to run the car. This statement holds good for reasonable methods of driving, i.e. driving with the governor lever set at a position to give reasonably slow running. Explosions under this condition occur at the point at which the governor commences to open the throttle, i.e. three to five miles pwe hour above the speed at which the governor lever is set to drive the engine. These explosions are not very vigorous and usually take the form, more of a gurgle than an explosion; they occur of course at relatively low speed, the speed depending on the governor setting. These explosions as in (a) are accentuated and multiplied by an air leak in the induction system; they are not seriously objectionable otherwise. (c) Explosions occurring under the conditions stated in (c) are the most objectionable and numerous; 90% of the causes of complaints are traceable to a faulty or ill-fitting throttle. If the throttle does not close fully, owing to one or more of the causes set down in this report, explosions occur at any and all speeds, the only controlling factor being mixture strength. With a normal carburetter setting and a sound induction system it is found that explosions taking place are slightly more violent and numerous when the Contd. | ||