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).
Continued discussion on induced effects from dual ignitions and spark synchronism in an engine.
| Identifier | ExFiles\Box 61b\4\ scan0214 | |
| Date | 26th March 1930 guessed | |
| -2- Contd. by 5 or 6 others in rapid succession, and the maximum gap necessary to avoid, for a period of 5 mins., a spark over, being .198". From these figures it will be seen that there is evidently an increased induced effect with both ignitions working together, and if this effect is due to, as is probable, occasional synchronism of the sparks, it is obviously an undesirable condition (from the point of view of the elimination of induced effects) to have on the engine. EFC/HEW. | ||