Wing spar is primary structural member supporting loads along wing span. Runs spanwise at right angles to fuselage. Distributes loads during flight and ground operations
Feathers are unique to all birds and made of keratin. Birds have a sound-producing organ called the syrinx. Flight structures distinguish birds from other animals
There are 17 different positions on the football field. Goalkeeper guards the net and prevents scoring. Defenders protect the goal and organize the defense. Midfielders control the central area and play various roles. Wingers create scoring opportunities for forwards
The fuselage serves as the central body of the aircraft, providing strength and stability. Wings generate lift through aerodynamic shape and forward motion. The cockpit houses flight instruments and controls for pilot control
Wright brothers developed first practical control surfaces. Ailerons control roll by moving opposite wingtips. Elevator controls pitch by moving up and down together. Rudder controls yaw by moving left or right on vertical stabilizer
Wood was first used in early aircraft due to high strength-to-weight ratio. Modern aircraft use metals like steel, aluminum, titanium and composites. Composite materials replaced metals due to improved strength and corrosion resistance