1 Rarely, fistulas occur externally to the skin or internally to another part of the biliary tree, to the pleural cavity or bronchial tree, or to the hepatic artery or portal vein or other vascular structures.
Load factor (aeronautics) In aeronautics, the load factor is defined as the ratio of the lift of an aircraft to its weight and represents a global measure of the stress (load) to which the structure of the aircraft is subjected: where: Since the load factor is the ratio of two forces, it is dimensionless.
Density is the weight of a unit volume of a material. In aircraft work, the specified weight of a material per. cubic inch is preferred since this figure can be used in. determining the weight of a part before actual manu-. facture. Density is an important consideration when. choosing a material to be used in the design of a part.