Weight

Lift is the downward force of the airplane. Weight changes during flight because the airplane burns fuel as it flies. Weight can also change during flight maneuvers. An example of this change is when an airplane is in aerobatic flight. If you've ever gone an amusement park ride, you probably have experienced a similar effect when the ride makes your body feel "weightless."

Weight is the force that opposes lift. In straight-and-level, unaccelerated flight, weight and thrust are equal.

Related Topics:

Drag
Lift
Thrust