Plain English Meaning
The shell that wraps around the engine. It keeps the engine covered, helps cool it, and gives the front of the airplane its smooth shape.
Full Definition
The removable metal or composite covering that encloses the engine on an aircraft, shaping the airflow around it, directing cooling air through the engine compartment, and protecting the engine from the elements.
Context Anchor
In turn training, a pilot may use the visible engine cowling as a reference against the horizon to judge where the airplane’s nose is pointing.
Derivation
From the French word 'coule,' meaning a hood or cape worn by monks. The cowling 'hoods' the engine in the same way — a covering that wraps over the top.
Why Pilots Care
A secure, properly designed cowling prevents overheating, , and protects the engine from damage during .