Reversing thrust produces less thrust than forward thrust for the same thrust lever angle because:

• A. Exhaust angle is aerodynamically limited
• B. Engine RPM drops when reversed
• C. Inlet airflow decreases in reverse
• D. Propeller blade efficiency drops in reverse

Answer: (A)

When thrust is reversed, the engine’s exhaust is redirected to point more forward, creating a braking effect. But the path of that redirected flow is limited by the hardware—nozzle and thrust reverser geometry restrict how far you can bend the exhaust. Because you can’t angle the exhaust perfectly backward, not all of the jet’s momentum contributes to opposing the aircraft’s motion. The result is a smaller opposing thrust component than the forward thrust you get at the same power setting. Other factors like engine RPM, inlet flow, or blade efficiency can influence performance, but they aren’t the main reason why reverse thrust is weaker for the same thrust lever angle—the exhaust angle is aerodynamically limited.