How many spark plugs are used per cylinder in the DA-40 engine?

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Multiple Choice

How many spark plugs are used per cylinder in the DA-40 engine?

Explanation:
Dual ignition is used to provide redundancy and improve combustion in many piston aircraft engines. In the DA-40, each cylinder has two spark plugs. Having two plugs per cylinder means that if one plug or its circuit fails, the other can still ignite the air‑fuel mixture, keeping the engine running safely. It also helps the flame start more reliably and burn more completely, which can enhance takeoff performance, smoothness, and fuel efficiency. The plugs are typically placed on opposite sides of the cylinder head and are wired to separate ignition paths so both plugs contribute to ignition. So, the DA-40 uses two spark plugs per cylinder.

Dual ignition is used to provide redundancy and improve combustion in many piston aircraft engines. In the DA-40, each cylinder has two spark plugs. Having two plugs per cylinder means that if one plug or its circuit fails, the other can still ignite the air‑fuel mixture, keeping the engine running safely. It also helps the flame start more reliably and burn more completely, which can enhance takeoff performance, smoothness, and fuel efficiency. The plugs are typically placed on opposite sides of the cylinder head and are wired to separate ignition paths so both plugs contribute to ignition. So, the DA-40 uses two spark plugs per cylinder.

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