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).
Inquiry about the advantages of a reversed order of construction for a coil.
| Identifier | ExFiles\Box 61b\4\ scan0150 | |
| Date | 9th December 1927 | |
| X4275 Extract from R2/M9.12.27. X.8710 Regarding the construction of the coil I shall be glad to know whether any great advantage is shown on test of the reversed order of building the coil, namely, with the fine wire inside, which naturally is more economical for expense and lower in resistance, as more of the less expensive primary winding is used, and the extra resistance is rather a benefit than otherwise, because we are at present fitting ballast resistance. | ||