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).
Tests conducted on weir and slotted type Phantom induction pipes.
| Identifier | ExFiles\Box 13\3\ 03-page023 | |
| Date | 21th April 1928 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} X7070 Hs{Lord Ernest Hives - Chair}/ACL1/LG21.4.28. PHANTOM INDUCTION PIPES. +8070 for sketch We have carried out a number of tests on the weir and slotted type of Phantom induction pipes and have obtained more success with the top feed weir type than with the underneath slotted. The best results so far when used with the std. chassis carburetter have been obtained with the one piece weir type pipe Sch.965 - see sketch - and our test bench results shew that the cold mix distribution and power is an improvement on the present standard type pipe. It will be remembered that our fears were it would be difficult to produce these pipes to give consistently good results due to the difficulty in casting accurately the inside contour. We therefore made a pipe with similar internal contours on the two piece scheme, or the scheme in which the feed nozzle is bolted to the distributing manifold. The previous two piece pipe departed somewhat from the internal contours of the good pipe and gave inferior results. We found however that the results with the latest two piece pipe were not so good as the original one piece weir pipe and after experiment found that there were still slight differences which had an appreciable influence on the distribution. These differences were as follows :- (1) The one piece model had a flattened part in the contd :- | ||