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.
Figuring out how much an individual airplane can carry is a simple math problem: Take the gross weight, subtract the empty weight, and you have a good starting number, called useful load. For example, if our gross weight is 1,600 lbs and our empty weight is 1,100 lbs, we have a neat 500 lbs of useful load. We'll need fuel of course, and let's assume for this example that we want to fill up the tanks.