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).
Review of induction system heating and distribution, comparing past experience on the Phantom engine with recent tests on the S.S. engine.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan047 | |
| Date | 21th January 1929 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. BJ. SG.{Arthur F. Sidgreaves - MD} E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/ACL1/T21.1.29. S.S.INDUCTION SYSTEM HEATING AND DISTRIBUTION. While reviewing the question of induction sy stem heating for the S.S. engine it is as well to recall our past experience in this direction on the Phantom engine and so from consideration of these results, and recent tests on the S.S. engine, estimate which of the sy stems would appear to be the most promising on the present engine. At one time and another we tested out various heating systems on the Phantom, the object in view being to obtain normal carburation operation of the engine in the shortest possible time after starting up from cold. The problem was attacked from two directions; quick heating up of the induction bend or hot spot and improvement of the cold distribution of the induction sy stem. With regard to the former we tested exhaust heating with the exhaust baffled in the one manifold to create a large flow through the hot spot at small throttle openings, unbaffled exhaust heating, water heating and steam heating. Of these sy stems the first - i.e. our present standard - was by far the quickest in operation but it had the disadvantage of having to employ a butterfly baffle in the exhaust pipe operated from the carburetter throttle operating mechanism. It was because of this disadvantage we were particularly desirous of employing one of the other sy stems. Contd. | ||