How does the CFM56-7B engine produce thrust?

How does the CFM56-7B engine produce thrust?

• A. By using only the bypass air
• B. Through exhaust gases only
• C. By compressing and heating 20% of the air
• D. By utilizing engine hum

Answer: (C)

The CFM56-7B engine produces thrust primarily by compressing and heating a portion of the incoming air, which is then mixed with fuel and ignited in the combustion chamber. While the engine utilizes a significant amount of bypass air—around 80% of the total air that enters the engine—it is actually the process of compressing and heating roughly 20% of the air that is critical for thrust production. This process results in high-speed exhaust gases that are expelled out the back of the engine, creating thrust according to Newton's third law of motion: for every action, there is an equal and opposite reaction. The efficient design of the CFM56-7B maximizes the thrust generated by this 20% of the compressed air while leveraging the bypass air to enhance overall engine efficiency. This understanding highlights how the engine works with both core and bypass airflow rather than relying solely on either one or the other, as well as clarifying that there is no contribution from phenomena such as engine hum in the production of thrust.

The CFM56-7B engine produces thrust primarily by compressing and heating a portion of the incoming air, which is then mixed with fuel and ignited in the combustion chamber. While the engine utilizes a significant amount of bypass air—around 80% of the total air that enters the engine—it is actually the process of compressing and heating roughly 20% of the air that is critical for thrust production.

This process results in high-speed exhaust gases that are expelled out the back of the engine, creating thrust according to Newton's third law of motion: for every action, there is an equal and opposite reaction. The efficient design of the CFM56-7B maximizes the thrust generated by this 20% of the compressed air while leveraging the bypass air to enhance overall engine efficiency.

This understanding highlights how the engine works with both core and bypass airflow rather than relying solely on either one or the other, as well as clarifying that there is no contribution from phenomena such as engine hum in the production of thrust.