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).
Suggestion to simplify the carburetter throttle coupling on the 4¼ Litre Bentley chassis.
| Identifier | ExFiles\Box 85\4\ scan0176 | |
| Date | 10th February 1937 | |
| RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} E.{Mr Elliott - Chief Engineer} c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} c. to JS{Mr Johnson's Secretary}/Tnr γ 208 Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}4/AP.10.2.37. 4¼ LITRE BENTLEY CHASSIS Carburetter Controls. A suggestion has been put forward by the Works, that the coupling between the carburetter throttles on the above chassis is unnecessarily elaborate and therefore expensive. We agree with this, as the coupling can be considerably simplified. It is essential that this coupling should be in effect, a universal joint between the throttle spindles, as it is impossible (from a Production point of view) to get these spindles sufficiently in alignment to have a solid coupling. The expensive part of this assembly is the method of adjustment between the two halves of the coupling. The pieces EB.241-2 should be deleted, and replaced by a simple clamping bolt, provision for which could be made by slight modification to EB.250. We should add that a micrometer adjustment is quite unnecessary, as the best way synchronising the throttles is as follows:- With the engine stopped; the coupling between the throttle spindles should be unlocked. Both throttles are then shut tight, and the coupling finally locked up. If this coupling were modified as suggested, the saving would be at least 1/- per chassis. A modification similar to the above was suggested by G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Ratcliffe four years ago. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||