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).
Modifications to a new horizontal carburettor for the 20/25 model.
| Identifier | ExFiles\Box 102\1\ scan0158 | |
| Date | 15th March 1934 | |
| To RHC{R. H. Coverley - Production Engineer}/HPS.{Horace Percy Smith - Experimental Factory Mgr} X5080 Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}7/KW.15.3.34. 20/25. New Horizontal Carburetter, LEC.3688. You are preparing two or more modified carbs. to LEC.3688. Instead of producing two the same size, namely, 1 3/8 throttle bore, we think it would be advisable, while this job is in hand, to produce one of these carbs. having 1.500 dia. throttle bore. This will enable us to decide upon the final design without having further parts made. It may be possible to produce the 1.500 carburetter from the existing casting E.59755. If so, you may be able to push this type through first, and so enable us to gather useful information as to the final result. Attached herewith necessary modifications. Ex. 13763. Suction Piston. V.1687 Main Jet Bush. V.1688 Carb. Body. V.1689 Throttle Valve. V.1690 " " Spindle. V.1691 Bush. V.1692 Barrel (slow running). Hs{Lord Ernest Hives - Chair}/C.T. Salt | ||