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).
Request to produce an aluminium cylinder head for the Phantom and to prepare drawings for cast iron cylinder blocks.
| Identifier | ExFiles\Box 65\4\ scan0374 | |
| Date | 22th November 1927 | |
| [strikethrough]To BY/CS.[/strikethrough] c. to HS.{Lord Ernest Hives - Chair} X8050 BY/SS{S. Smith}1/DB.{Donald Bastow - Suspensions}22.11.27. Re Phantom - Aluminium Cylinder Head. Will you please put in hand an aluminium cylinder head similar in all respects to E.76656, but suitable for a compression ratio 4½ to 1. The lower face of the casting should be made thick enough to produce a compression ratio of 4½ to 1, by suitable machining. At this stage we also suggest you prepare detail drawings of cast iron cylinder blocks, suitable for both the above heads, replacing the alum: dry liner type. These cylinder blocks will probably be required in the early future. BY/SS.{S. Smith} [Circular Stamp: RECEIVED 23 NOV 1927] | ||