Investigation carried out at Langley Field for purpose of determining adaptability of camera obscura to securing of turning characteristics of airships, and also of obtaining some of those characteristics of "C-7" airship.
Determination of turning characteristics of an airship by means of a camera obscura
U. S. Nat. Advisory Comm. Aeronautics -- Report
1925
8 pages
7 Figs.
Report
Englisch
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