How fo airships actually Fly?
Why airships fly is explained by the Principle of Archimedes: “Bodies submerged into a fluid receive from it a lifting force which is equal to the mass of the displaced fluid.” (This is the same principle that explains why boats float on water.) The airship is filled with a lifting gas (Hydrogen, Helium, hot air or natural gas). The air in which the airship finds itself has a higher specific weight than the lifting gas. The envelope filled with the light gas generates a lift that is equal to the weight of the displaced air. Like a (light) cork floating in (heavier) water, a helium or hydrogen filled balloon floats in the heavier air.
