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).
Electrical experimental record sheet for a combined mains switch and auxiliary unit F.
| Identifier | ExFiles\Box 64\4\ scan0278 | |
| Date | 16th January 1929 | |
| X 7655 ELECTRICAL EXPERIMENTAL RECORD SHEETS. Date. 16-1-29. Combined mains switch and auxiliary unit F.{Mr Friese} Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered | Total Miles. 16-1-29 | lab. | | Received from shop. | | | | 15-2-29 | " | | Used on lab rig for starter trials & modified to LEC 2620. | | | | 11-3-29 | 22 EX | 13-3-29 | Fitted to 22EX | 0026 | | | 13-3-29. | Shop | 14-3-29 | Removed from chassis and modified with brass winding cheeks and modified carbon arm. | | | | 14-3-29 | 22 EX | | Tested OK and fitted to 22EX. | 265 | | | 22-4-29 | " | | Starter system failed. Switch burnt out. | | 8766 | 8501 | 8501 23-5-29 | lab | | Removed from chassis and examined in lab | | | | Switch now scrap. | ||