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 an ignition coil test.
| Identifier | ExFiles\Box 69\2\ scan0014 | |
| Date | 28th January 1930 | |
| X 8712 No. L.I.7. D72503. coil ELECTRICAL EXPERIMENTAL RECORD SHEETS. -:- Ignition coil wound on Paxolin tubes over core and primary, minus copper securing rings on core, secondary parallel wound and insulated with 2 turbs of wax paper per layer. Finished coil impregnated with paraffin wax. Date on. | LOCATION | DATE OFF | REMARKS | Miles reading start. | Miles reading finish. | Miles covered | Total miles. 28-1-30 | Lab | | Received from Mr. Brock. | | | | 13-2-30 | 14G4 | | Fitted to 14G4 | 14402 | | | 12-5-30 | " | | Completed 10,000 mile test in France OK. | | 30812 | 16410 | 16410 3-6-30 | " | | | | 31888 | 1076 | 17486 8-7-30 | " | | Coil now standardized. | | 33873 | 1985 | 19,471 25-7-30 | " | | Car handed over to repair dept for sale. | | 35316 | 1443 | 20,914 | ||