What is the primary function of longerons in an aircraft?

• A. Provide rigidity and strength along the fuselage
• B. Enhance aerodynamic performance
• C. Stabilize the wing structure
• D. Reduce overall weight of the aircraft

Answer: (A)

The primary function of longerons in an aircraft is to provide rigidity and strength along the fuselage. Longerons are structural components that run longitudinally along the aircraft's body, acting as the backbone of the structure. They ensure that the fuselage maintains its shape and can withstand various loads and stresses during flight. By distributing the loads evenly, longerons contribute significantly to the overall structural integrity of the aircraft, which is essential for safety and performance. While longerons may indirectly support aerodynamic performance and weight considerations, their main role centers around reinforcing the fuselage, allowing it to bear the stresses encountered during flight and aiding in maintaining the overall stability of the aircraft's structure.