What is the climb gradient for the second segment of the takeoff path?

The climb gradient for the second segment of the takeoff path is determined by the specific performance requirements set out in aviation regulations, particularly for ensuring safe aircraft operation after takeoff. In this context, a climb gradient of 2.4% is appropriate because it provides a balance between maintaining sufficient altitude and speed while allowing for the safe navigation of obstacles that may exist in the aircraft's flight path.

During the second segment, which begins after reaching a certain height and continues until a specific acceleration altitude, the aircraft should be able to climb effectively while also accelerating to a safe and efficient speed for further flight. A gradient of 2.4% signifies a relatively steep climb that ensures the aircraft can gain altitude safely and adhere to regulatory standards, which is critical during the early stages of flight where obstacle clearance is a priority.

The other values listed do not align with standard operational requirements for commercial flights. A 1.2% climb gradient is generally too low for ensuring obstacle clearance, while 3.0% may be too steep for many aircraft under normal operating conditions. A gradient of 0% would indicate no climb at all, which is not viable during the takeoff segment. Thus, 2.4% is the most suitable and recognized climb