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).
Carburettor pilot jet arrangements for starting aero engines, comparing Sthenos, Claudel Hobson, and Mercedes models.
Identifier | ExFiles\Box 31\3\ Scan015 | |
Date | 8th December 1914 | |
-3- COPY. is used. I mean, of course, a jet that would be about one tenth of the size of our present low speed jet, and only capable of running the engine without a load at something like three or four hundred revolutions, even when not throttled by anything but a very small choke tube on this very small pilot jet. Such a pilot jet as I mean will be found on the Sthenos carburetter, which, if it is correctly carried out should permit the engine to be started without flooding, with the throttle closed as they have arranged it to be, even though the engine is turned slowly, say, at forty revolutions per minute. This arrangement of pilot jet on the Sthenos carburetter is interesting, and is something like we propose putting on our aero engine. I do not consider that the Claudel Hobson is a good starting arrangement and so far xx I have not been able to understand in what way the petrol is controlled in the pilot jet of the Mercedes carburetter. F.H.R. (Text printed upside down at the bottom of the page: R.R. 238A (150 (H)) (S.V. 44. 8-12-14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0855.) | ||