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Which components do rotor blades made of metal contain?

  • A

    Spar of titan, filling material of stainless steel, and outer skin of steel.

  • B

    Spar of lead, filling material of steel, and outer skin of stainless steel.

  • C

    Spar of aluminum, filling material of titan, and outer skin of aluminum.

  • D

    Spar of steel, filling material of aluminum, and outer skin of aluminum.

The spar is a primary load-bearing structural element running along the length of the rotor blade. In metal rotor blades, the spar is usually made of high-strength metals such as steel or titanium and the structure is filled with aluminium. It provides the necessary strength and stiffness to support the aerodynamic loads experienced during flight.

The skin of the rotor blade covers the outer surface and provides aerodynamic shape to the blade. In metal rotor blades, the skin is typically made of thin sheets of metal, such as aluminium or composite materials in some modern designs. The skin material contributes to the overall strength and rigidity of the blade while maintaining a smooth surface for airflow.

Metal rotor blades may contain additional internal structural elements, such as ribs and spars, to provide reinforcement and maintain the blade's shape under aerodynamic forces.

The components of rotor blades made of metal contain spar of steel, filling material of aluminium, and outer skin of aluminium.

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