Definition
An engine that produces power by continuously drawing in air, compressing it, mixing it with fuel and igniting it, and expanding the resulting hot gases through a turbine. The turbine extracts energy from the gas flow to drive the compressor and, depending on design, to produce thrust directly (turbojet, turbofan) or to drive a propeller or rotor shaft (turboprop, turboshaft).
Plain English
An engine that works by sucking in air, squeezing it, burning fuel in it, and letting the hot gases rush through a fan-like wheel that spins to keep the engine running and produce power.
Context Anchor
Seen in aircraft engine descriptions, turbine-airplane training, preflight checks, engine-start procedures, and discussions of engine temperature and power limits.
Derivation
Gas turbine combines gas (the hot expanding gases produced by burning fuel) with turbine (from Latin turbo, meaning whirlwind or spinning thing). The name describes the core idea: a wheel spun by hot, fast-moving gas.
Why Pilots Care
Gas turbine engines power most jets and turboprops, offering high reliability, power-to-weight ratio, and performance at altitude.
Grounding Statement
Picture air entering the front of the engine, being squeezed, mixed with fuel and burned, then rushing through spinning wheels before leaving the engine.
Intuition Check
Do not read gas turbine engine as an engine that runs on gasoline. In this term, gas means the hot expanding air and burned fuel that flow through the engine and spin the turbine.
Example Sentence 1
Before her first flight in the King Air, she completed ground school on gas turbine engine operation, including start sequences and temperature monitoring.
Example Sentence 2
Many training aircraft use a gas turbine engine to provide smooth power for high-altitude cross-country flights.