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).
Manufacturing methods for special light pistons for the Phantom model, weighing sand casting against forging.
| Identifier | ExFiles\Box 66\1\ scan0102 | |
| Date | 3rd September 1926 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to BJ. Hs.{Lord Ernest Hives - Chair} X. 8040 R4/M3.9.26. RE. SPECIAL LIGHT PISTONS FOR PHANTOM. We should like these tried as sand castings, of the semi-pedestal type, provided the magnesium alloy already submitted, (of approximately 1.82 specific gravity) is suitable for the heat. If however we cannot get magnesium alloy suitable for a piston except as a forging, will this mean a drop forging to shape, or does it mean a forged and machined piston like the Y. metal? .R. | ||