Why are dual magnetos used in an engine ignition system?

Dual magnetos are utilized in an engine ignition system primarily to improve combustion and provide a backup for safety. The use of two magnetos ensures that there is redundancy; if one magneto fails, the other can continue to supply spark to the engine. This redundancy is vital for maintaining safe operation, particularly in aircraft engines where reliability is critical.

In addition to safety, the dual magneto setup contributes to more complete and efficient combustion of the fuel-air mixture. Each magneto can produce a spark independently and at slightly different timing, which helps to ignite the mixture in both halves of the combustion chamber. This can lead to a more evenly distributed ignition, reducing the likelihood of misfires and improving overall engine performance.

While factors such as fuel efficiency, power output, and engine temperature may be associated with the operation of an engine, they are not the primary reasons for the implementation of dual magnetos. The focus is largely on enhancing ignition reliability and combustion efficiency.