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SESK: Stuff Everyone Should Know · sesk.info/aero-engine-cowling

What is the streamlined cover around an airplane engine called?

It is an engine cowling.

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  1. Cowling ✔
  2. Aileron
  3. Bulkhead

Why: A cowling covers the engine while presenting a smoother shape to the airflow. Its shape helps reduce aerodynamic drag around the engine installation.

Huh, didn't know that: Openings in a cowling also route cooling air around engine components.

The dad joke
The engine wore a cowling because every powerplant needs a good cover story.
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References

Answer: Cowling. A cowling covers the engine while presenting a smoother shape to the airflow. Its shape helps reduce aerodynamic drag around the engine installation.

  1. Aerospace Dimensions Module 2: Aircraft Systems and Airports akwg.cap.gov/media/cms/Module_2__Aircraft_Systems_and_Airp_1A4CD2C6AF085_eae81.pdf
    Cowlings, or engine covers, with a low aerodynamic frontal area drag.
    Checked 2026-10-10.

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