A lifting gas, or lighter-than-air gas, is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Only certain lighter-than-air gases are suitable as lifting gases.
A lifting gas, or lighter-than-air gas, is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Only certain lighter-than-air gases are suitable as lifting gases.
Source: Wikipedia "Lifting gas" · CC BY-SA 4.0
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