Aircraft Structures

In addition to primary structural and control components, aircraft wings often incorporate aerodynamic devices designed to improve performance, handling, and efficiency. Winglets, vortex generators, stall fences, and gap seals are all common wing features. The following sections provide an overview of these common wing features and their functions. Winglets A winglet is a vertical extension … Read more

The landing gear supports the aircraft during landing and while it is on the ground. Simple aircraft that fly at low speeds generally have fixed gear. This means the gear is stationary and does not retract for flight. Faster, more complex aircraft have retractable landing gear. After takeoff, the landing gear is retracted into the … Read more

The history of aircraft structures underlies the history of aviation in general. Advances in materials and processes used to construct aircraft have led to their evolution from simple wood truss structures to the sleek aerodynamic flying machines of today. Combined with continuous powerplant development, the structures of flying machines have changed significantly. The key discovery that lift … Read more

All aircraft structures are subjected to forces during flight, landing, taxiing, and ground operations. These forces create stresses within structural members that must be carefully considered during aircraft design and maintenance. Understanding the major types of structural stress helps technicians recognize how loads affect aircraft components and why proper repairs are essential for maintaining structural … Read more

Fuselage Construction The fuselage is the primary structural body of an aircraft and serves as the central attachment point for major components such as the wings, empennage, landing gear, and powerplant. It provides space for passengers, cargo, flight controls, and aircraft systems while carrying and distributing loads encountered during flight and ground operations. Understanding fuselage … Read more

Helicopter structures are designed to provide the unique flight characteristics that distinguish rotary-wing aircraft from fixed-wing aircraft. A simplified explanation of how a helicopter flies is that the rotors are rotating airfoils that provide lift similar to the way wings provide lift on a fixed-wing aircraft. As the rotor blades rotate through the air, they … Read more

The empennage, commonly known as the tail section, is the rear assembly of an aircraft that provides stability and control during flight. It consists of fixed and movable aerodynamic surfaces that maintain the aircraft’s attitude and allow it to maneuver about its longitudinal and vertical axes. Regardless of its configuration or location, the empennage performs … Read more

Secondary or auxiliary flight control surfaces are devices used to improve aircraft performance, control, and handling characteristics during various phases of flight. Unlike primary flight controls, which directly control roll, pitch, and yaw, auxiliary flight control surfaces enhance lift, reduce drag, improve stability, assist maneuvering, and reduce pilot workload. Common auxiliary flight control surfaces include … Read more

Proper aircraft maintenance is essential to ensure continued airworthiness, reliability, and flight safety. Maintenance personnel rely on manufacturer documentation, standardized procedures, and accurate recordkeeping to inspect, repair, and service aircraft systems and structures. Understanding aircraft location numbering systems and access provisions is also critical for performing maintenance efficiently and correctly. Aircraft Maintenance Documentation Maintenance of … Read more