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).
Carburetter improvements, comparing diffuser type jets with plain jets and mentioning the development of an SS expanding carburetter.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan043 | |
| Date | 21th January 1929 guessed | |
| contd :- -2- The first row of air holes in the diffuser could be placed under the petrol level so as to give an early 'pick up' and a suitable capacity accelerating well incorporated. The mixture issuing from a diffuser type jet is much better XXXX atomised than that issuing from the present type plain jet and should further improve distribution. If such a scheme possessed any advantages in performance over the present carburetter it would be very simple to apply to the present parts - needing probably only the new diffuser unit, dash pot without air ports, and choke. We are not in any way neglecting the SS.{S. Smith} carburetter development which naturally will take time to make satisfactory because we feel that when a radical carb. change is made the expanding type SS.{S. Smith} is an instrument which will give us many advantages over other carburetters. In the meantime we think we could quickly find out the possibilities of the diffuser type jet in the standard carburetter which if found to possess any advantages could be easily used with the SS.{S. Smith} engine until such time as we are ready with the SS.{S. Smith} expanding carburetter. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||