Here's why:
* Dynamic Equilibrium: Aircraft are constantly in a state of dynamic equilibrium. This means the forces are constantly adjusting, never perfectly balanced.
* Maneuvers: During maneuvers like turns, climbs, or descents, the forces intentionally shift to achieve the desired change in direction or altitude.
* Wind: Wind conditions introduce additional forces, further disrupting the perfect balance of the four forces.
However, there are specific conditions where the forces are approximately balanced:
* Steady, level flight: In ideal conditions, when an aircraft is flying at a constant speed and altitude, the forces of lift and weight are roughly equal, as are thrust and drag. This is the closest we get to a "balance" of forces.
Important Note: Even in this scenario, the forces are not truly equal. They are constantly adjusting slightly to maintain the desired flight condition.
