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Dupuy de Lome’s dirigible, 1872

Dupuy de Lome’s dirigible, 1872.jpg Jullien’s model dirigible, 1850ThumbnailsGiffard’s steam dirigible, 1852Jullien’s model dirigible, 1850ThumbnailsGiffard’s steam dirigible, 1852Jullien’s model dirigible, 1850ThumbnailsGiffard’s steam dirigible, 1852Jullien’s model dirigible, 1850ThumbnailsGiffard’s steam dirigible, 1852Jullien’s model dirigible, 1850ThumbnailsGiffard’s steam dirigible, 1852
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Giffard was succeeded in France, first by Dupuy de Lome; then by Gaston Tissandier, well-meaning projectors of steerable balloons, but too cautious to effect an important advance in the art. The first of these gentlemen, an eminent marine engineer, in 1872, completed a gas balloon for the French government, resembling the one designed by General Meusnier in 1784, and like that also driven by muscular power actuating a screw, and kept rigidly inflated by use of an internal balloon, or ballonet. The car was suspended from the bag by a close fitting cover instead of a net, in order to lessen the resistance, and it was kept in alignment by use of crossed suspension cords. A speed of but six miles an hour was attained by the industrious work of eight men operating an ample screw propeller. A decade later Tissandier, with a balloon of like design, but driven by the power of an electric motor and bichromate of potash battery, attained a speed of six to eight miles an hour.

Author
Aërial Navigation
A Popular Treatise on the Growth of Air Craft and on Aëronautical Meteorology
By Albert Francis Zahm
Published in 1911
Available from gutenberg.org
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