Definition
A set of sheet-metal panels and flexible seals fitted around an air-cooled aircraft engine that direct the flow of cooling air from the engine cowling inlets across the cylinder fins, ensuring even cooling of all cylinders during flight.
Plain English
Metal walls and rubber-edged seals around the engine that force incoming air to flow over every cylinder instead of taking the easy path around them, so each cylinder gets cooled properly.
Context Anchor
Seen during engine preflight inspection, maintenance, and discussions of engine cooling or high engine temperature.
Derivation
Baffle comes from an old word meaning to hinder or deflect. The system gets its name because it deflects and redirects airflow rather than letting it pass straight through.
Why Pilots Care
A damaged or missing baffle can cause localized overheating, leading to cylinder damage or engine failure.
Analogy
Think of the baffle system like the cardboard dividers in a package that keep items in the right spaces. The air is being guided into the right paths instead of wandering anywhere it can escape.
Intuition Check
Baffle does not mean “confuse” here. It means a part that guides or redirects airflow.
Example Sentence 1
During preflight, the pilot peered into the cowling and noticed a torn rubber seal on the baffle system, which could allow cooling air to bypass the rear cylinders.
Example Sentence 2
The mechanic replaced a cracked seal in the baffle system before the next flight to restore proper airflow.