Rigid
A Dictionary of Military Terms · 1918 · p. 19
A term applied to a dirigible balloon whose envelope is provided with a stiff framework to keep it in shape.
Bu kavram başka kaynaklarda da geçiyor
Stedman's Medical Dictionary: A Practical Medical Dictionary (1920)
A Dictionary of Aviation (1911)
The American Dictionary and Cyclopedia (1910)
Chamber's Twientieth Century Dictionary (1908)
Explanation of Terms Used in Entomology (1906)
BOEMCHER II. (1912-13.) Non-rigid
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All the World's Aircraft (1913)
LEBAUDY-JUILLOT 6=Military M II. (1910.) Semi-rigid
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All the World's Aircraft (1913)
FRENCH DIRIGIBLES (Non-rigid)
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All the World's Aircraft (1913)
GERMAN MILITARY CLASS—GROSS-BASENACH. (Semi-rigid)
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All the World's Aircraft (1913)
PARSEVAL CLASS (Non-rigid)
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All the World's Aircraft (1913)
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