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).
Extract from a report on the performance of an ignition coil and distributor after mileage tests.
| Identifier | ExFiles\Box 69\1\ scan0322 | |
| Date | 28th April 1930 | |
| X8710 28.4.30. Extract from Mr.Hancock's report dated 12.3.30. on 14-GIV. after 5,000 miles. X5690 Ignition coil L.I.7. wound on tube with parallel secondary winding. Distributor with modified contact point arm. We have not had any sign of the coil failing. The contacts are in good condition, they show no sign of burning, and have remained quite firm. 26.3.30. after 10,000 miles. There has been no sign of coil failure. The contacts show slight sign of burning and pitting. Rotor and cam are O.K. | ||