The purpose of Helium gas in any airship, including modern airships, is to reduce the overall density and thus provide "lift."
It was hydrogen. That's why it caught fire. Modern airships use helium.
Some use hot air (like a hot air balloon) and others use helium.
the amount of gas would shrink
An airship, made up of a huge gas-filled balloon, and powered by propellers.
Don't you mean airplane moron? And it uses gas. like petroleum. or diesel.
Helium has replace hydrogen in airships
Airships and Zeppelins and Observation balloons were used successfully in WW1. They were filled with Hydrogen which is the lightest gas but is also explosive when ignited. (Later, airships began to use Helium) The airship flew because it was filled with a gas that was lighter than the air so that it "floated" in the sky. This is the same theory that makes boats float. For an airship to fly, the weight of the airship and the hydrogen contained it in has to be less than the weight of the Air it displaces. In other words, the Airship takes up space in the air and if it weighs less than the air, then it will fly. For it to move forward, the airship had propellors to push it forward. It also had control surfaces on the tail to turn it and help it climb or dive.
It did for 28 seconds until a fatal gas explosion occured.
M65 Gas Mask.
an Airship is an aircraft of the lighter-than-air type sustained in the air by gas an aeroplane in a mechanically propelled heavier-than-air flying machine
no, not always. there's the choice of hydrogen or helium.