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).
The performance and weight comparison of magnesium pistons fitted to a Phantom car.
| Identifier | ExFiles\Box 66\1\ scan0130 | |
| Date | 25th February 1927 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} X8040 Hs{Lord Ernest Hives - Chair}4/LG25.2.27. MAGNESIUM PISTONS. X4117 We are running a Phantom car fitted with magnesium pedestal pistons which contain 4% of copper. The comparative weights of complete pistons, rings and pins are as follows :- Standard 1.70 lbs. Magnesium 1.28 lbs. The engine on which they are fitted is exceptionally smooth at high speeds and with the throttle shut. How much this is due to the pistons, is being investigated. Hs.{Lord Ernest Hives - Chair} | ||