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).
Letter regarding the unsuitability of 'Ebony Sindanyo Insulating Material' following a test.
| Identifier | ExFiles\Box 24\2\ Scan279 | |
| Date | 21th December 1927 | |
| To BY.{R.W. Bailey - Chief Engineer} from EFC. EFC7/T21.12.27. EBONY SINDANYO INSULATING MATERIAL. Please find attached copy of my assistant's report on the above, a sample of which you submitted to us for test. You will see that we have not found this to be very suitable for the purposes for which such material might be used by ourselves. EFC. | ||