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).
Comparison of Electron Magnesium Alloy and Aluminium pistons for engines from BMW and Daimler Benz.
| Identifier | ExFiles\Box 142\4\ scan0014 | |
| Date | 19th March 1928 | |
| COPY. Enclosure. Electron Magnesium Alloys. Pistons. Large sample which you have to Blue Print herewith No. K.1117. Weight in Electron 3.2 lbs. " " Aluminium 5.2 " This piston is made in series for B.M.W. 12 cyl. aero engine - 750 HP nominal rating. Alloy Cm.Si. Small piston which you have. To Blue Print No. K.1077. This piston is made in series for Daimler Benz. Daimler 7 litre Sports supercharged - 240 B.HP. Alloy AS.62 or Cm.Si. We will confirm this. 19.3.28. | ||