👉 In aerodynamics, a girder is a type of wing element that has two or more rotating sections. These sections are connected by a series of slats and ribs, which help to reduce drag and increase lift. A girder is typically constructed from metal tubing or other lightweight materials like aluminum or stainless steel, and can be used in a variety of applications such as aircraft wings, helicopters, and boats. The term "girlofts" comes from the French word for "girder