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).
Induction pipe's fuel mixture distribution to cylinders.
| Identifier | ExFiles\Box 32\5\ Scan208 | |
| Date | 16th February 1923 | |
| 1st. EXPL: INDUCTION PIPE. X1692 16.2.23 X1692 / X.2758 [Diagram of an induction pipe with annotations] Annotations include: - Cylinders 6 & 5 marked 'RICH' - Cylinders 4 & 3 marked 'WEAK' - Cylinders 2 & 1 marked 'RICH' - Dimensions: 10.2", >2.3"<, 7", 4", DIA 1.7", CROSS SECTION AREA 2.27 sq" 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:- | ||