The aerial age : a thousand miles by airship over the Atlantic Ocean; airship voyages over the Polar Sea, the past, the present and the future of aerial navigation (1911)
Wellman, Walter, 1858- · New York : A.R. Keller · leaf 281
cubic feet of hydrogen weighino-34,500 ounces, or 2,150 pounds. Bv this simplemeans we have gained a lifting force of 23,650pounds—the difference between the weight ofthe air displaced and the gas which displaces it.In the case of the America the gas bag, with itsvalves, inner balloons for air, and… … Airship America beixg towed by the Steamer Farm — 1909. SECRETS OF AIRSHIPS 225 Although hy^hogen has a weight only aboutone-twelfth that of air, it takes more than a tonof it to fill the reserv^oir of our airship. Themanufacture of this quantity of gas was not aneasy or inexpensive operation. A…
Aeronautics
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