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).
List of investigative actions for manufacturing drums and liners using high silicon alloys and different bonding methods.
| Identifier | ExFiles\Box 120\1\ scan0298 | |
| Date | 3rd February 1941 | |
| Rm{William Robotham - Chief Engineer}/GB.4/ET.3.2.41. - 2 - 2. Get a pair of drums made in a high silicon alloy. Mr. Wheeler suggested 13% Si. This should make the contact area between drum and liner greater and therefore reduce working temperatures. It has a lower coefficient of expansion and a lower elastic limit. 3. Investigate the possibilities of putting the liner on the core when the latter comes out of the oven and pouring at a higher temperature so that the liner is raised to the temperature of the aluminium before the latter sets. This procedure should increase the likelihood of a good bond. 4. Investigate the possibilities of spraying aluminium on the liner before casting. A good bond might be obtained this way. Rm{William Robotham - Chief Engineer}/GB. G.B. | ||