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).
Test results for diameter changes, shrinkage, and blistering of three material specimens: Elo, Bakelite, and Mouldensite.
| Identifier | WestWitteringFiles\I\September1922\ Scan66 | |
| Date | 12th September 1922 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No P.B. 50. Customer's No. X 1109. Date: Sept 12th 1922. In the results given below, the figures for the diameter of each specimen, obtained after the test, are the maximum and minimum of three measurements. Table: Specimen | Dia. Before Test | Dia. After Test (Max.) | Dia. After Test (Min.) | Per cent. Shrinkage (Max.) | Per cent. Shrinkage (Min.) --- | --- | --- | --- | --- | --- Elo. | 1.851" | 1.810 | 1.808 | 2.32 | 2.22 Bakelite. | 1.860" | 1.828 | 1.818 | 2.26 | 1.72 Mouldensite | 1.856" | 1.832 | 1.822 | 1.83 | 1.29 In addition it was found that the Bakelite had slightly blistered, while the Elo and Mouldensite had only just commenced. Signed C.A.P. This Sheet must be filed on completion of the work. | ||