Which factor affects thrust the most?

Which factor affects thrust the most?

• A. Humidity
• B. Temperature
• C. Compression RPM
• D. Altitude

Answer: (C)

Thrust mainly depends on how much air is moved through the engine and how fast that air is accelerated to the exhaust. The compressor RPM sets this primary control: turning faster pulls in more air and compresses it to a higher pressure, increasing the energy available for combustion and producing a higher-velocity exhaust. That direct impact on mass flow and exhaust speed makes thrust respond strongest to changes in compressor speed. Humidity changes air density only slightly, so its effect on thrust is minimal. Temperature and altitude alter air density too, which does influence thrust, but they don’t control the engine’s airflow as directly as the compressor speed does. So the factor that affects thrust the most is the compressor RPM.

Thrust mainly depends on how much air is moved through the engine and how fast that air is accelerated to the exhaust. The compressor RPM sets this primary control: turning faster pulls in more air and compresses it to a higher pressure, increasing the energy available for combustion and producing a higher-velocity exhaust. That direct impact on mass flow and exhaust speed makes thrust respond strongest to changes in compressor speed.

Humidity changes air density only slightly, so its effect on thrust is minimal. Temperature and altitude alter air density too, which does influence thrust, but they don’t control the engine’s airflow as directly as the compressor speed does. So the factor that affects thrust the most is the compressor RPM.