What is the benefit of feathering a propeller?

Feathering a propeller refers to the ability to adjust the angle of the propeller blades to a position where they align with the airflow, minimizing drag when the engine produces insufficient power or if it fails. The primary benefit of feathering is the reduction of drag. When the blades of the propeller are feathered, they create less resistance against the air as the aircraft moves, which is crucial for maintaining better performance and control during critical flight phases, particularly in multi-engine aircraft.

By reducing drag, feathering helps the aircraft maintain a more efficient aerodynamic profile, enabling it to glide better and potentially extend its range after an engine failure or during descent. This position allows for a more streamlined flow over the wings and fuselage, contributing to improved performance in flight.

The other response options, while they relate to propeller operation and aircraft performance, do not capture the primary purpose of feathering as effectively as the reduction of drag does.