Definition
An aircraft fuel metering system that mixes incoming air with fuel in the correct ratio before delivering the mixture to the engine cylinders for combustion. The carburetor draws fuel from the float chamber through a venturi, where the accelerated airflow creates low pressure that pulls fuel into the airstream and atomizes it.
Plain English
The part of the engine that combines air and fuel in the right proportions, then sends that mixture to the cylinders to be burned.
Context Anchor
Seen in engine and induction system discussions, especially when learning how a piston aircraft engine receives air and fuel.
Derivation
Carburetor comes from the French 'carburer,' meaning to combine with carbon. The device combines air with the carbon-rich fuel before it enters the engine, which is why the name stuck.
Why Pilots Care
A properly functioning carburetor system is essential for reliable engine power and prevents dangerous conditions such as fuel starvation or carburetor icing.
Analogy
Think of it like mixing fuel and air into the right recipe before the engine can burn it. Too much or too little of either ingredient can make the engine run poorly.
Intuition Check
Do not think of the carburetor system as only one metal part bolted to the engine. In aviation use, it means the working arrangement that controls and delivers the fuel-air mixture to the engine.
Example Sentence 1
Before takeoff, the pilot checked that the carburetor system was delivering a smooth idle with the mixture set to full rich.
Example Sentence 2
In cold weather the pilot applied carburetor heat to prevent ice from forming inside the carburetor system.