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).
Use of different alloys like alum-magnesium and alum-bronze for strong and lightweight castings.
| Identifier | ExFiles\Box 148\3\ scan0039 | |
| Date | 1st December 1927 | |
| Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} RG.{Mr Rowledge} c. to BJ. WGr. DA.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} 41476 R1/M1.12.27. RE. CASTING IN ALUM: X.8000 AND BRONZE+ X.1476 It will be realised that it is of the utmost importance to get the strongest and lightest castings in alum., for crankchambers etc. I understand that we are persevering to get:- (1) Hall light alloy (alum-magnesium)or something equal. (2) Die-castings were where-ever possible. (3) Use of alum. bronze because it is stronger than other bronzes, and can be die-cast. I did hear that (3) was not used because it was difficult to machine, but there should be no change from the instructions without permission from the designers and testing engineers, because of the loss of strength. R.{Sir Henry Royce} | ||