Definition
The forward force produced by an aircraft's powerplant that propels the aircraft through the air. Thrust acts opposite to drag and is generated by accelerating a mass of air rearward, whether by a propeller, a turbojet, a turbofan, or a rocket motor.
Plain English
The push that moves an aircraft forward. The engine throws air (or exhaust) backward, and the aircraft moves forward in response.
Context Anchor
You will see thrust discussed when learning the four basic forces of flight, engine power changes, takeoff performance, climb performance, and slow flight.
Derivation
From the Old Norse 'thrysta', meaning to push or press. The aviation meaning keeps that everyday sense exactly: a pushing force.
Why Pilots Care
Thrust must exceed drag for acceleration and sustained flight; too little prevents takeoff or climb.
Analogy
Thrust is like the push you feel when a boat motor drives a boat forward through water. The aircraft’s power system does the same kind of job in air.
Grounding Statement
When the pilot advances the throttle for takeoff, the engine and propeller create more thrust, and the airplane begins to accelerate down the runway.
Intuition Check
Thrust does not just mean any strong push. In aviation, it means the propulsive force made by the aircraft’s power system to move the aircraft through the air.
Example Sentence 1
On takeoff roll, the pilot advanced the throttle to full power and felt the thrust push the aircraft forward.
Example Sentence 2
During takeoff roll, maximum thrust overcomes drag and allows the airplane to accelerate.