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).
List of experimental insulations for electrical units, comparing present and proposed materials.
| Identifier | ExFiles\Box 24\2\ Scan169 | |
| Date | 20th September 1921 guessed | |
| EXPERIMENTAL INSULATIONS FOR ELECTRICAL UNITS. Piece. No., Name., Present material., Proposed material. BALLAST F.7343-4, Washers., Mica., Bakelite-dilecto. F.7354, Bush., Micanite., " F.7345, Washer., Mica., " F.7893, ", Minanite., " ACTUATOR. F.7051-2, Plates., Ebonite., " F.7054-5, Washers., Presspahn., " F.6710, ", ", " F.7269, Plate., Ebonite., " G.4288, Washers., Presspahn., " G.4287, Tubes., Paper., One each bakelite-dilecto rod, and bakelite rod (Swiss) MAIN SWITCH. E.12965, Plate., Vulcasbestos., Continental Bakelite. E.12955, Washer., Micanite., Bakelite-dilecto. E.12953, ", ", " E.12948, ", Vulcasbestos., " E.12956, Tube., Ebonite., Continental Bakelite(rod) E.12957, ", ", " " E.12961, Core washer., Presspahn., Bakelite-dilecto. E.12970, " tube., Menilla paper, Bakelite rod (Swiss) E.6710, " washer., Presspahn., Bakelite-dilecto. F.6711, ", ", " | ||