Change from cast iron to a steel pipe design for an exhaust manifold.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan076 | |
| Date | 28th January 1929 | |
| FROM E. {Mr Elliott - Chief Engineer} C. to HS. {Lord Ernest Hives - Chair} SECRET. SS. {S. Smith} EXHAUST MANIFOLD. X7230 From R's recent memos, you will see that he does not think cast iron suitable. We believe he means this as applied to the existing design of manifold which is of the flexible type. R. {Sir Henry Royce} will subsequently have received a print of the proposed design in which expansion is provided for by sliding. Regarding memo. R1/M16.1.29., this calls for a steel pipe of larger diameter and thickness, which, unless we use pipes surged down at the ends to fit existing flanges, or butt welding, will call for modifications to cylinder head stud centres. We want to use 2.25 pipe .104 thick. If you will get some tube of this size on order we will send a drawing early this week for the shape of manifold. E. {Mr Elliott - Chief Engineer} | ||
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).