Which of the following is a benefit of using composite materials for propeller blades?

Using composite materials for propeller blades offers several advantages, one of the most significant being a longer lifespan. Composite materials, typically a combination of polymer resins reinforced with fibers such as carbon or fiberglass, exhibit superior fatigue resistance compared to traditional metallic materials. This characteristic allows propeller blades made from composites to withstand the cyclic stresses and strains encountered during operation without succumbing to fatigue-related failures.

Additionally, composite materials are less susceptible to environmental factors, such as corrosion and UV degradation, which contribute to the wear and tear of aircraft components over time. Their inherent ability to resist such deterioration means that propeller blades can maintain their structural integrity and performance characteristics for a longer period, thereby extending the overall service life of the blades.

In contrast, options like increased weight, higher noise levels, and less aerodynamic efficiency are generally associated with traditional materials used in propeller construction, such as aluminum or various alloys. These factors limit the performance and operational efficiency of metal propellers compared to those made from advanced composite materials.