Which component of lift must remain equal to the weight of the aircraft to maintain altitude during a turn?

To maintain altitude during a turn, the vertical component of lift must equal the weight of the aircraft. When an aircraft is in level flight, the lift generated by the wings must counterbalance the weight to keep the aircraft at a consistent altitude.

During a turn, the total lift experienced by the aircraft is tilted relative to the vertical axis due to the bank angle necessary for the maneuver. As the aircraft banks, a portion of the total lift continues to counteract the aircraft's weight vertically, which is referred to as the vertical component of lift. If this vertical component is less than the weight, the aircraft will descend; if it is greater, the aircraft will climb.

This balance is crucial for maintaining altitude. The horizontal component of lift during the turn acts to change the direction of the aircraft rather than alter its altitude. Total lift produced could be increased or decreased based on changes in speed and angle of attack, but it is how much of that lift is directed vertically that determines whether the aircraft will maintain, descend, or climb in altitude. Induced drag is related to lift generation and increases with higher angles of attack and slower speeds, but it does not directly govern altitude maintenance during the turn.

In summary, to sustain level flight during a turn,