Which type of construction has added longitudinal members such as longerons and stringers?

• A. Monocoque
• B. Semimonocoque
• C. Composite
• D. Traditional

Answer: (B)

The concept of longerons and stringers being added to the construction of an aircraft's structure is integral to the semimonocoque design. In semimonocoque construction, the structure is reinforced with additional longitudinal members, which serve to increase the strength and rigidity of the aircraft while allowing for a lightweight design. Longerons run along the length of the fuselage or wing, providing support and forming part of the framework, while stringers add support along the aircraft's surface. This system allows for a more efficient distribution of loads and improves the overall aerodynamic performance.

Monocoque construction, on the other hand, relies on the outer skin to bear most of the load without the need for internal framing. This limits structural support in comparison to semimonocoque designs. Composite construction can vary significantly, but it generally utilizes materials such as carbon fiber and does not inherently specify the use of traditional longitudinal members like longerons and stringers. Traditional construction may refer to older methods not utilizing advanced design techniques found in modern aircraft structures.

Thus, the addition of longerons and stringers makes semimonocoque construction a superior choice for strength and efficiency compared to the other types mentioned.