What does "thrust" refer to in aviation?

Thrust is a fundamental concept in aviation that specifically refers to the force generated by the engines to propel the aircraft forward. This forward motion is essential for flight, as it counteracts the forces of drag—air resistance that opposes the aircraft's movement—and helps the aircraft accelerate or maintain speed.

In practical terms, thrust is produced by various types of engines, such as jet engines or propellers, which utilize different principles of physics to create this force. For example, jet engines expel exhaust gases backward, which in turn generates an equal and opposite reaction that pushes the airplane forward, adhering to Newton's third law of motion.

Understanding thrust allows aviation professionals and enthusiasts to appreciate how aircraft achieve and maintain flight, highlighting its crucial role in various phases of flight, from takeoff to cruising and landing.