Which statement about propeller blade construction is correct?

• A. Blade incorporates fairing made of plastic foam covered with reinforced nylon rubber to direct airflow into the engines
• B. Solid aluminum alloy
• C. Shanks are partially hollow for weight reduction
• D. The blade has no fairing

Answer: (A)

The main idea is that propeller blades are built around a lightweight core that is given the final aerodynamic shape, then covered with an outer skin to provide strength and durability. This combination creates a smooth, efficient blade fairing that guides the airflow and minimizes drag. Describing the blade as having a plastic foam fairing covered with reinforced nylon rubber fits that concept: the foam forms the internal contour, and the reinforced outer skin provides the protective, load-bearing surface that shapes the airflow over the blade. This type of construction keeps the blade light while maintaining the necessary strength for the forces it experiences in flight, and the fairing helps direct and smooth airflow around the blade and hub for better efficiency. The other options refer to materials or configurations that either aren’t typical for blade construction or omit the important fairing that aids aerodynamics.