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 report on various fibre and insulating materials, detailing results from heat, water, oil, and acid immersion tests.
| Identifier | ExFiles\Box 24\2\ Scan193 | |
| Date | 10th April 1922 guessed | |
| -2- Contd. Material. Grade. Test 1. Test 2. Remarks. Diamond Fibre. Sheet,grey. - Carbonized 275º) Sheets not suits (Fibres) natural } for test 1. Vulmos fibre. - 13 Blisters 230º. Elluminite. Cured. 40 Oozing 180º. Breaks on test 1 Solidite. - - Soft 180º Breaks on test 1 Thermoplax. - - Unaffected. Moulding not suitable for test 1. ________________________________________________________________________________ In the third test the amount of water absorbed during a 100 hours immersion was found. The samples were first well dried by being kept in a current of warm air rising from a rheostat for about two days. They were then weighed, soaked for 100 hours, and reweighed, thus showing the percentage increase. The absorption of the phenols varied from small amounts up to 11.5% for paxolin. The rubbers mostly showed a very small absorption, while the fibres, as would be expected showed the largest increase, and became very much softened. In test four the pieces of insulation were immersed in engine oil for several days amounting to a total time of 192 hours. None of the materials was affected by this treatment except for absorption in some cases, which, however, was not measured, being assumed proportional to the absorption of water. Test five was immersion in dilute sulphuric acid of 1350 density the time being just over 120 hours. Some of the phenol samples deteriorated slightly in this test and the fibres rotted through, although no effect was observed on the rubbers. The particulars of tests three and five are shown on the following table:- Contd. | ||