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).
Production test table for a combined main switch and auxiliary switch unit.
| Identifier | ExFiles\Box 64\4\ scan0206 | |
| Date | 10th January 1929 | |
| PRODUCTION TEST TABLE of COMBINED MAIN SWITCH AND AUXILIARY SWITCH UNIT. III. AUXILIARY SWITCH UNIT. Date. | Unit number. | (1) Gap remarks. | (2) Amperes to | (3) Amperes to | (4) Load l.b.w. | Remarks. ---|---|---|---|---|---|--- 14-12-28 | A | OK | 2.30 | 1.55 | 1.0 lbw — 3.10 amps | E.7.C's gaps arranged with carbon interval gap. 12-12-28 | B | OK | 2.80 | 1.10 | " | " 17-12-28 | C | OK | 2.50 | 2.10 | " — 4.30 | " 20-12-28 | D | OK | 2.80 | 1.23 | " — 4.10 | E.7.C's gaps modified 7-1-29 | E | OK | 2.78 | 1.80 | " — 2.0 | " 27-2-29 | E | OK | 2.80 | 3.00 | " — | R's gaps to LEC 2620 modified to E.F.C's instructions. 6-3-29 | F | OK | | 1.90 | " — 5.50 | " " 11-3-29 | D | OK | 2.90 | 1.00 | " — 2.50 | " " 10.1.29. | ||