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).
Page 2 of a document describing a manifold drainage slot design and its limitations.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 22 | |
| Date | 20th January 1928 guessed | |
| (2) With the slot underneath the manifold can be made to drain either into the carburetter or into the engine as desired. We must point out that with the under type slot the length is limited to 6", owing to the proximity of Nos. 3. & 4. sparking plugs. This however was the length of the slot on the successful pipe tested. E.{Mr Elliott - Chief Engineer} | ||