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 design and development of the 'Godward' Carburetter after a visit to the engineer at Kingston.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page292 | |
| Date | 26th February 1919 | |
| x.59. To CJ. from EH. EH1/LG26.2.19. 26th. Feb. 1919. RE "GODWARD" CARBURETTER. Acting on your instructions I went with Mr. Moore to see the "Godward" Carburetter at Kingston. We saw there the engineer who has been developing this carburetter. The carburetter they are making and intend to put on the market is entirely different to the original carburetter which was subject to the first four patents. The idea of the original carburetter was to use a lot of gauze in an expansion chamber between the throat and the throttle; they have now given that up entirely. The reason for doing this was because the efficiency of the carburetter from the HP. point of view was so bad. This is only what one would anticipate. The carburetter now consists of the ordinary float chamber with the submerged jet in the petrol passage from the float chamber to a stand pipe. The submerged jet is controlled by a restriction needle which is an ordinary straight taper. The restriction is set so as to give just full power. There is no hand control on the restriction needle. The stand pipe is a straight-forward pipe with a counter sunk screw screwed into the top. Between the screw and the stand pipe is a perforated washer so that ample petrol can always be supplied through spaces which are cut in this washer. Surrounding the stand pipe is an outer tube which forms a small annular passage for air. Outside this is a conical helical spring. The coils of this spring when the engine is at rest form a joint but with the suction of the engine they open out (Contd | ||