Which propeller component retains the blades within the propeller assembly?

• A. spinner
• B. barrel
• C. dome
• D. stationary section control assembly

Answer: (B)

The main idea here is which part physically holds the blades in place inside the hub. The barrel is the cylindrical piece that surrounds the blade roots and provides the mounting interface, with bolts or fasteners securing the blades to the hub. This keeps the blades from moving as they experience centrifugal loads and torque. The spinner is just the aerodynamic nose cone and doesn’t secure blades. The dome isn’t a standard retention component in propeller anatomy, and the stationary section control assembly handles changing blade pitch through oil/servo mechanisms rather than keeping blades in place. So, the barrel is the component that retains the blades within the propeller assembly.