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).
Outlining suggestions for improving the bond between drum and liner materials.
| Identifier | ExFiles\Box 120\1\ scan0296 | |
| Date | 3rd February 1941 | |
| Rm{William Robotham - Chief Engineer}/GB.4/HT.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 over 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. | ||