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).
The wear of a bakelite block and corrosion of sparking points and a rotor after a 4,000-mile test.
| Identifier | ExFiles\Box 35\6\ scan 102 | |
| Date | 16th February 1923 guessed | |
| -2- Contd. .021" i.e. .261" to .240" for the bakelite. With this block, however, what little fibre was wom away, was powdered into a light fluffy mass that thickly covered the bakelite lever, cam, and other parts. At the end of 4,000 miles, this had to be cleared away as it was getting into the breaker lever bearing and also between the contact points. It was again covered by the end of the test. The six sparking points were badly corroded, the metal of the rotor, and even the gauze covering the ventilation being affected. Appreciable spark wear has npw taken place on the rotor tip, this amounting to a depth of about .030". CAP. | ||