According to the Aerodynamic textbook, how does Thrust Specific Fuel Consumption

Question

According to the Aerodynamic textbook, how does Thrust Specific Fuel Consumption (Ct) vary with RPM?

Thrust Specific Fuel Consumption does not change with RPM.

Thrust Specific Fuel Consumption increases with increases in RPM.

Thrust Specific Fuel Consumption decreases with increases in RPM.

Thrust Specific Fuel Consumption is equal to thrust.

Thrust Specific Fuel Consumption does not change with RPM.

Thrust Specific Fuel Consumption increases with increases in RPM.

Thrust Specific Fuel Consumption decreases with increases in RPM.

Thrust Specific Fuel Consumption is equal to thrust.

Explanation / Answer

Thrust Specific Fuel Consumption decreases with increases in RPM.

Jet engines operate efficiently only when operated at close to maximum rpm. If you throttle a jet engine back below a critical rpm it becomes very inefficient.

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