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.
1 Drag is a component of the aerodynamic force, namely the projection onto the direction parallel to the relative wind. 2  Lift is another component of the aerodynamic force, namely the projection onto the two directions perpendicular to the relative wind.  Weight is the force of gravity.