Document with a sketch detailing the construction and insulation of primary and secondary windings on a core.
| Identifier | ExFiles\Box 164\5\ img042 | |
| Date | 9th February 1931 guessed | |
| W.E.80 The disposition (3) of primary and secondary Cont'd windings relative to the core was as shown in sketch. [DIAGRAM] TOP CORE. SECONDARY BOTTOM PRIMARY The secondary was insulated from the primary by a paper tube .019" thick 1 1/2" diameter and 3 5/8" long which also formed a suitable base for the primary winding. The length of secondary winding was found viz to be 2.35" leaving a distance at each end of .400". Enamelled wire .004" diameter was used for the winding the interlayer insulation being as follows - between first 3 layers next to primary .003" thick remaining layers except last, .003" thick last layer .009" thick. The grade of paper used did not resemble wax or varnished paper but appeared to be a plain white paper impregnated with some kind of bituminous compound. Each layer of paper | ||
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).