What is the principal function of engine cowling and baffles?

What is the principal function of engine cowling and baffles?

• A. To direct airflow over cylinders for cooling
• B. To seal the crankcase
• C. To hold accessories
• D. To reduce vibration

Answer: (C)

Directing cooling air over the cylinders is the main job of engine cowling and baffles. The cowling provides a smooth shell that shapes the flow, while the baffles seal gaps and create a defined path so air is forced across the cylinder fins (and the oil cooler) to carry heat away. This targeted airflow prevents overheating and promotes even cooling across the engine. Sealing the crankcase, holding accessories, or reducing vibration are not the primary roles of cowling and baffles, though the assembly can influence vibration and may accommodate accessories as part of the overall engine installation.

Directing cooling air over the cylinders is the main job of engine cowling and baffles. The cowling provides a smooth shell that shapes the flow, while the baffles seal gaps and create a defined path so air is forced across the cylinder fins (and the oil cooler) to carry heat away. This targeted airflow prevents overheating and promotes even cooling across the engine.

Sealing the crankcase, holding accessories, or reducing vibration are not the primary roles of cowling and baffles, though the assembly can influence vibration and may accommodate accessories as part of the overall engine installation.