How do blimps/rigid airships actually land when filled with gasses lighter than air?
In: Engineering
The gas is lighter then air but the airship is heavier then air. So together they are just as heavy as air. The exact weight of the airship can be adjusted by either releasing gas, refilling the gas from bottles or dropping ballast. But most of the time the altitude can easily be controlled by changing the pitch of the airship using the elevators in the tail and then use the engines to go up or down depending on the pitch. This is very similar to how an aircraft changes altitude.
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