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).
Analysis of fuel mixture distribution in a first experimental induction pipe.
| Identifier | ExFiles\Box 75\2\ scan0297 | |
| Date | 16th February 1923 | |
| 1st. EXPL: INDUCTION PIPE. X2758 16:2:23 X1697 X2758 [Diagram of an induction pipe with 6 cylinders] Labels on diagram: RICH WEAK DIA. 1.7" CROSS SECTION AREA 2.27 D" 10.2" 7" 12.5" K This pipe gave an extremely rich mixture on cylinders 6 and 1 - cylinders 4 and 3 were very weak. This was evident at all speeds but more noticeable at low speeds. At speeds below 1500 r.p.m. cylinders 6 and 1 were so rich that much after burning took place in exhaust. Distribution (cold) Cyl: Nos. | R.P.M. | 6 | 5 | 4 | 3 | 2 | 1 | |--------|----|----|----|----|----|----| | 500 | VR{E. S. Voller - Orders} | OK | SW | VW | OK | R | | 750 | R | SR | OK | OK | SR | R | On increasing strength of mixture, 5 and 6 richens quickest. On decreasing strength 4 and 3 starve first. In all cases 6, 5 and 4 are richer than 3, 2 and 1 with carburetter intake on R.H.S. Distribution proportional to above table at all speeds above 750. After burning in exhaust more pronounced contd:- | ||