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).
Gap tables for a main and auxiliary switch unit, version 2.
| Identifier | ExFiles\Box 64\4\ scan0147 | |
| Date | 19th December 1928 | |
| 19.12.28. MAIN AND AUXILIARY SWITCH UNIT GAP TABLES. VERSION 2. MAIN SWITCH:- Position of switch. Air gap at core centre. Core to armature stop. Copper gap. Carbon gap. Off. .066 .075 .065 .055 Auxiliary switch .046 .050 .032 .015 carbons just in contact. Carbons just in .038 .040 .020 0 contact. Coppers just in .025 0 0 0 contact. Full on. .005 0 0 0 AUXILIARY SWITCH:- Position. Air gap at core centre. Gap between pole core & arm. stop. Gap at upper contact. Gap at lower contact. Gap at carbon contacts. Off. .066 .073 0 .053 0 Carbons just .056 .060 .015 .035 0 breaking. Just making on .035 0 .045 0 .041 lower contact. Full on. .005 0 .086 0 .098 EFC. | ||