Airframe

Patrick Snyder / airframe

The airframe of a plane is its Mechanical structure. It is typically considered to include fuselage, wings  and undercarridge. A nd exclude the propulsion system. Airframe design is a field of aeropspace engineering that combines aerodynamics,materials and manufactoring methods to achieve balances of performance, reliability,  and cost. In the 1920's all alluminum structures where created. The 1940's brought alloy and airfoils to make the planes stronger and faster. Present day planes made by boeing have a one piece fuselage made with carbon fiber.