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).
Request for an experimental test on an ignition coil using enamelled primary wire.
| Identifier | ExFiles\Box 164\5\ img044 | |
| Date | 7th February 1931 | |
| X6058 RHC.{R. H. Coverley - Production Engineer} from EFC. EFC3/AD7.2.31. X.6058. IGNITION COIL WITH ENAMELLED PRIMARY WIRE. Will you please have made for experimental test an otherwise standard D.72503 ignition coil but with the primary wound with enamelled copper wire instead of the present single cotton covered wire. There would be one layer of .005" oil silk between each layer of primary winding. HEW. EFC. | ||