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 finer primary coil with specially built up primary winding.
| Identifier | ExFiles\Box 69\1\ scan0173 | |
| Date | 28th December 1928 | |
| X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. SP{Mr Spinney} 4 X. No: - 8710 Finer primary Coil with specially built up primary winding | Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. | |------------|-----------|-----------|---------------------------------------------------------------|----------------------|-----------------------|----------------|--------------| | 26-8-27 | lab | 31-8-27 | Received in lab | | | | | | 5-9-27 | 10EX | | Fitted to chassis 10EX | 5373 | | | | | 29-9-27 | " | | | | 6248 | 875 | 875 | | 31-10-27 | " | | | | 6896 | 648 | 1523 | | 9-1-28 | " | | Speedometer changed | | 9356 | 2460 | 3983 | | 31/1/28 | " | | | | 9725 | 369 | 4352 | | 6-2-28 | " | | | 257 | 931 | 674 | 5026 | | 5-3-28 | " | | | | 1619 | 688 | 5714 | | 12-4-28 | " | | | | 1823 | 204 | 5918 | | 7-5-28 | " | | | | 2894 | 1071 | 6989 | | 4-6-28 | " | 13-6-28 | Coil removed to lab. | | 4242 | 1348 | 8337 | | 13-6-28 | lab | | | | | | | | 7-7-28 | " | | Run considerably on bench for 10000 mile tests. | | | | | | 28-12-28 | | | Failed, found to be due to overheating when unwound. | | | | | | ||