What is the function of a magneto?

What is the function of a magneto?

• A. Provides electrical current to spark plugs independent of the battery
• B. Stores electrical energy for starting the engine
• C. Regulates engine oil pressure
• D. Converts mechanical energy to heat energy in the exhaust

Answer: (A)

In aviation ignition, a magneto acts as an ignition generator that creates a high-voltage spark for the spark plugs without needing the aircraft’s battery. It is driven by the engine, so as the crankshaft turns it generates electricity and delivers the spark to the plugs at the correct timing. This independence from the battery is why magnetos are trusted for reliable ignition, even if the electrical system is unavailable. They do not store energy, regulate oil pressure, or convert mechanical energy into heat in the exhaust.

In aviation ignition, a magneto acts as an ignition generator that creates a high-voltage spark for the spark plugs without needing the aircraft’s battery. It is driven by the engine, so as the crankshaft turns it generates electricity and delivers the spark to the plugs at the correct timing. This independence from the battery is why magnetos are trusted for reliable ignition, even if the electrical system is unavailable. They do not store energy, regulate oil pressure, or convert mechanical energy into heat in the exhaust.