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 instructed modifications for various coils, specifying the type of insulation to be used.
| Identifier | ExFiles\Box 69\1\ scan0258 | |
| Date | 4th November 1929 | |
| -2- Coil modifications instructed. L.C.3. instructed to be rewound with standard varnish paper with extra initial secondary layer insulation. Not yet received. L.C.2. instructed to be rewound with paraffin wax paper with extra initial secondary layer insulation. Now received. L.C.5 & L.C.6. instructed to be wound with paraffin wax paper of normal amount. L.C. coils with super secondary insulation. See EFC2/AM.4.11.29 to Ev.{Ivan Evernden - coachwork} EFC. | ||