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).
Test schedule report detailing the design and construction of an experimental coil.
| Identifier | ExFiles\Box 69\1\ scan0293 | |
| Date | 23th December 1929 | |
| X. 8710 23.12.29. TESTS OF EXPERIMENTAL COILS TO SCHEDULE. Type of coil :- X.No. 8710 Date 13-1-30 Coil No. L.I. 1. Particulars of design and method of construction :- (a) Core. Std as on Drawing D72428 (b) Primary. Std as on drawing D72428. (c) Secondary. Std as on drawing D72428. (d) Primary insulation. None between layers. (e) Secondary insulation. 4 turns of oil paper between first 3 layers and 2 turns between remaining layers. (f) General. This coil was placed on production on 31-12-29. | ||