How many spark plugs does the dual ignition system provide spark for?

A dual ignition system is typically designed for engines that utilize two spark plugs per cylinder for enhanced reliability and performance. In a standard aircraft engine with a configuration of four cylinders, the dual ignition system would provide spark for eight spark plugs, as each cylinder will have one spark plug connected to each of the two ignition systems. This redundancy ensures that if one spark plug or ignition system fails, the other can continue to provide necessary ignition to maintain optimal engine operation. Therefore, in a typical configuration, a dual ignition system would indeed account for eight spark plugs total, illustrating the importance of redundancy in aviation engine systems for safety and reliability.