Term

weight

Daniel MarkFounder & Editor, Aviatopia
Published Mar 1, 2026Updated Mar 1, 20261 min read

The gravitational force acting on the aircraft — one of the four forces of flight, opposed by lift and affected by fuel burn, payload, and loading.

aviation-glossary

Quick Facts

Type
Aerodynamic Force
Definition
The gravitational force acting on the aircraft
Used By
Pilots, Engineers

Definition#

Weight is the force of gravity acting on the total mass of the aircraft and its contents. In level flight, weight must be balanced by lift. Weight decreases during flight as fuel is consumed.

Why It Matters Operationally#

Weight determines required lift, stall speed, takeoff distance, climb rate, range, and landing distance. Exceeding weight limits (MTOW, max landing weight) is prohibited and may compromise structural integrity.

See Also

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