Which propeller position is associated with the least drag?

The feathered position of a propeller is designed to minimize drag. When a propeller blades are feathered, they are rotated to align with the airflow, effectively reducing their surface exposure to the wind. This positioning is particularly important during engine failures or in situations where the propeller needs to be stopped from generating thrust. By reducing drag, feathering allows the aircraft to maintain better performance and efficiency, especially during descent or gliding scenarios.

In contrast, other positions like low pitch and high pitch lead to increased drag. Low pitch typically positions the blades at a steeper angle which can effectively produce thrust but increases drag, particularly at higher speeds. High pitch is designed for cruising and can optimize fuel efficiency; however, it also creates more drag than feathering. The idle position allows the propeller to continue rotating but at a reduced thrust output, creating drag from both the moving blades and the thrust being produced.

In summary, feathering the propeller minimizes drag, maximizing aerodynamic efficiency while enhancing glide performance and overall operational capability when needed.