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 experiments record sheet tracking the mileage of H.T. cables.
| Identifier | ExFiles\Box 52\1\ Scan113 | |
| Date | 24th August 1929 | |
| X4473. H.T. cables of "Helsby" make sandwiched with std "Maconite" ELECTRICAL EXPERIMENTAL RECORD SHEETS. Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered. | Total miles. 27-9-28 | 12 EX | | Fitted to 12 EX | 382 | | | 19-10-28 | " | | | | 1490 | 1108 | 1108 6-11-28 | " | | | | 2419 | 929 | 2037 31-12-28 | " | | | | 4378 | 1959 | 3996 30-1-29 | " | | " | | 5498 | 1120 | 5116 18-3-29 | " | | " | | 8129 | 2631 | 7747 15-4-29 | " | | | | 8459 | 330 | 8077 14-5-29 | " | | | | 9432 | 973 | 9050 4-6-29 | " | | | | 11045 | 513 | 9563 9-7-29 | " | | | | 12015 | 970 | 10,533 24-8-29 | " | | Car handed over to repair dept for sale. | | 15442 | 3427 | 13,960 | lab. | | H.T wires returned to lab and tested. | | | | | ||