How are these airships similar? How are they different?
All of theses airships are similar in the fact that they use gas to create lift.
How they use the gases to stay buoyant is a little different.
Dirigibles and blimps fill the main envelope with gas that is lighter than air. Dirigibles have a fixed frame, so they can only hold a set amount of helium in it's envelope. Hot air balloons make the air in the ships bladder hot by keeping a flame lit right under it.
Blimps can actually steer and hover, where as blimps can only go where ever the wind blows them.
All of theses airships are similar in the fact that they use gas to create lift.
How they use the gases to stay buoyant is a little different.
Dirigibles and blimps fill the main envelope with gas that is lighter than air. Dirigibles have a fixed frame, so they can only hold a set amount of helium in it's envelope. Hot air balloons make the air in the ships bladder hot by keeping a flame lit right under it.
Blimps can actually steer and hover, where as blimps can only go where ever the wind blows them.
http://www.aerospaceweb.org/question/history/q0169.shtml
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