Airships do use gas, to provide lift.
the gas that helps airships is i hate you wikianswers.com
gas is still used in airships to provide lift.
Hydrogen used to be used in airships.
There never were hydrogen powered airships. Hydrogen provided lift, not propulsion. Propulsion came from combustion engines using diesel or gasoline.
In their early history, buoyant airships (zepellins, blimps) were filled with hydrogen, a highly flammable gas. Since the Hindenburg disaster, hydrogen has been supplanted by helium, a much more expensive material, but one that is inert and hence much safer.
Zeppelins.
Airships move primarily through the use of buoyancy and propulsion. They are filled with a lighter-than-air gas, such as helium or hydrogen, which allows them to rise. For horizontal movement, airships are equipped with engines and propellers that generate thrust, enabling them to steer and navigate through the air. The combination of buoyancy for altitude control and propulsion for forward movement allows airships to travel efficiently.
The gas that helium replaced was Hydrogen
The Hindenburg disaster
Helium has replace hydrogen in airships
hot airships don't really exist. you get hot air balloons, but they're only marginally steerable. If you were to find a hot air ship, well, then lift would be provided by the hot air. The gas they'd use to create that hot air would be propane.
Using hydrogen in airships is considered dangerous because hydrogen is highly flammable and can lead to explosions if exposed to air. This risk was famously demonstrated by the Hindenburg disaster in 1937, where an airship filled with hydrogen caught fire and crashed. As a result, helium is now the preferred gas for use in airships due to its non-flammable nature.