Determination of Turning Characteristics of an Airship by Means of a Camera Obscura (1925)
NASA Technical Reports Server (NTRS) · leaf 5
4 KEPOKT NATIONAL ADVISORY I'OMMITTKK F()K AKHON A l;TU'S … plished, two duplicate circling flights were made over Fig. l.—A vertical section through the camera obscura the camera, from which the data were obtained. The camera was approached from up-wind at a constant barometric altitude of approximately 3,000 feet with engines turning at 1,000 revolutions…
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