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 materials specifying quantities and types of copper wire for an engine component.
| Identifier | ExFiles\Box 61b\2\ scan0280 | |
| Date | 15th November 1935 | |
| BY/RD4/W.15.11.35. (Contd:- - 3 - 20 SWG. .036" dia. Enamelled and Single Paper Covered, TDF.318, High Conductivity Copper Wire, .040" dia.over insulation. 3 lbs. 42 SWG. .004" dia. Enamelled High Conductivity-Copper Wire, .0048" dia.over insulation. 13 1/2 oz. May we remind you that there are four ignition distributors per engine : The quantities called for on the L.O.P. provide material for one complete engine. x :- Extra print attached. BY/RD. | ||