FAA Powerplant Written Practice Test

What is the typical position of cowl flaps during the climb phase of flight?

1. Fully closed

2. Partially open

3. Fully open

4. Completely removed

The correct answer is: Partially open

During the climb phase of flight, cowl flaps are typically in a partially open position. This configuration allows for optimal engine cooling. During climb, the engine produces a higher amount of power and heat, and partially opening the cowl flaps increases airflow through the engine compartment to dissipate this heat while still maintaining adequate aerodynamic efficiency. Keeping the flaps fully open could lead to excessive drag, while fully closing them might not provide enough cooling, risking overheating. Thus, the partially open position represents a balance between necessary cooling and aircraft performance during the climb phase.