Definition
Airplanes powered by a reciprocating internal combustion engine, in which fuel and air are burned inside cylinders to drive pistons up and down. The pistons turn a crankshaft, which in turn drives a propeller to produce thrust.
Plain English
Airplanes that fly using the same basic kind of engine found in a typical car—one with cylinders and pistons—connected to a propeller instead of wheels.
Context Anchor
You will see this term in FAA discussions of small training airplanes, engine operation, aircraft handling, performance, and emergency procedures.
Derivation
‘Piston’ comes from the Italian ‘pistone,’ meaning a large pestle that pounds up and down. That captures the action exactly: pistons move up and down inside the cylinders to turn the engine.
Why Pilots Care
Most pilots learn to fly in piston-powered airplanes, and these engines behave differently from turbine engines—they require careful mixture control, are sensitive to altitude and temperature, and have specific starting and operating procedures.
Intuition Check
Do not assume piston-powered means any airplane with a propeller. It means the engine makes power with pistons; many piston airplanes have propellers, but the piston engine is the defining part.
Example Sentence 1
Most flight schools train new pilots in piston-powered airplanes such as the Cessna 172.
Example Sentence 2
Transition training often begins with piston-powered airplanes before moving to more complex turbine aircraft.