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Hydrogen and Helium in Airship Operations. The two primary lifting gases used by airships have been hydrogen and helium. Hydrogen is the earth’s lightest element, and it can be obtained. Army airship Roma in 1.

The atomic weight of a helium atom (4.002) is approximately four times that of an individual hydrogen atom (1.007), but since gaseous hydrogen is a diatomic molecule.

Army hydrogen airship Roma. Norfolk, VA, February 2.

Helium’s non- flammable nature makes it the only practical lifting gas for manned lighter- than- air flight, but it is scarce. Lifting Gas. Much of an airship’s weight is fixed (the dead weight of the ship’s structure and engines, and required weight.

But since helium has always been a rare and expensive gas, helium airships began their flights only 9. Hydrogen ships simply released inexpensive and easy- to- replace hydrogen, but helium- inflated ships required equipment.

Navy in 1. 92. 4 it was inflated with hydrogen, and the ship. When the United States Navy operated the same ship with helium, as U. S. S. 1. 0, from Rio de Janeiro to Friedrichshafen on April 6, 1.

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