Which force counteracts gravity in flight?

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Prepare for the Unmanned Aircraft System (UAS) Exam with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Get ready to ace your exam!

Multiple Choice

Which force counteracts gravity in flight?

Explanation:
Lift is the upward aerodynamic force produced by the wings or rotor blades as air moves past them. This force counters gravity by pushing up against the weight that pulls the UAV downward. The amount of lift depends on airspeed, wing or rotor area, air density, and the angle of attack. In steady, level flight, lift equals weight, keeping the aircraft's altitude constant. If lift becomes greater than weight, the UAV climbs; if lift is less than weight, it descends. The other forces—weight (downward gravity), thrust (forward propulsion), and drag (air resistance)—play different roles in flight but do not counter gravity directly.

Lift is the upward aerodynamic force produced by the wings or rotor blades as air moves past them. This force counters gravity by pushing up against the weight that pulls the UAV downward. The amount of lift depends on airspeed, wing or rotor area, air density, and the angle of attack. In steady, level flight, lift equals weight, keeping the aircraft's altitude constant. If lift becomes greater than weight, the UAV climbs; if lift is less than weight, it descends. The other forces—weight (downward gravity), thrust (forward propulsion), and drag (air resistance)—play different roles in flight but do not counter gravity directly.

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