EnginesIgnition Systems
Magneto
A magneto is an engine-driven electrical generator that uses permanent magnets and coils to produce high-voltage current for the spark plugs. It operates independently of the aircraft's primary electrical system, ensuring the engine continues to run even if the alternator or battery fails.
Key Points
- •Provides electrical current directly to spark plugs without requiring battery power.
- •Aircraft use dual magnetos for redundancy and improved combustion efficiency.
- •Tested during pre-flight run-ups to ensure a predetermined RPM drop is not exceeded.
- •The impulse coupling fitted to one magneto provides a hot, retarded spark for easier starting.
Exam Relevance
Understanding magneto operation is crucial for engine start procedures, run-up checks, and managing in-flight electrical failures.
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