Which factor is essential for maintaining a steady climb?

In the context of maintaining a steady climb, it is essential for thrust to exceed drag. During a climb, the aircraft needs to overcome not just the gravitational pull (weight) but also the aerodynamic resistance acting against it (drag).

When thrust exceeds drag, the aircraft can ascend while also maintaining the necessary airspeed. If thrust does not exceed drag, the aircraft would either level off or begin to descend, as it would lack the power required to overcome resistance effectively. This principle is crucial in understanding how airplanes achieve and sustain a climb.

While minimizing drag and balancing weight are important for overall performance and efficiency, the key factor in achieving and maintaining a steady climb specifically relates to the relationship between thrust and drag. Ensuring that thrust is greater than drag allows for a continuous upward motion and the ability to gain altitude, which is the goal of a climb maneuver.