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).
Modified list of substitute experimental insulation materials for electrical units.
| Identifier | ExFiles\Box 39\3\ Scan151 | |
| Date | 31th August 1921 | |
| X3513 EFC. AB.21. 31st Aug. 1921. HYDE VICEROY X.1109 - MODIFIED LIST OF EXPERIMENTAL INSULATIONS FOR ELECTRICAL UNITS. X.3513. Now that the sheet material, with the exception of the grade A (asbestos-paper base) bakelite dilecto, originally suggested by Mr. Olley for the above experiment is available, a list of substitutions has been made up accordingly. Other experimental units could be made up using the paxolin etc. but these will be tested in any case with insulations generally. List attached. F.J.Allen. | ||