During which phase of flight is the landing gear usually retracted?

The landing gear is usually retracted after takeoff. This phase occurs once the aircraft has gained enough altitude and speed, ensuring that it can safely continue its ascent without the drag that the landing gear causes. The primary purpose of retracting the landing gear is to improve aerodynamic efficiency and fuel economy by reducing drag as the aircraft climbs and proceeds to cruise altitude. During takeoff, the landing gear remains extended to provide sufficient stability and control while the aircraft is still close to the ground. After the aircraft has successfully taken off and is climbing, retracting the landing gear is a standard procedure that enhances performance.

In contrast, before takeoff, the landing gear is in its extended position to prepare the aircraft for its initial ground roll. During cruising, the landing gear remains retracted as part of the flight's normal aerodynamics. Lastly, the landing gear must be extended again before landing to enable a safe touchdown and stop the aircraft. Thus, the correct response is that the landing gear is typically retracted after takeoff.