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MODIFICATION OF KB-14A AND P-220 CAMERAS
NAVAL AIR DEVELOPMENT CENTER JOHNSVILLE PA AERONAUTICAL PHOTOGRAPHIC EXPERIMENTAL LAB
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In developing special photographic packages and installations for use in high altitude balloon and rocket vehicle photography, the possibility of adapting the P-220, 70mm aerial camera to these applications through suitable modification was explored. Specific design changes and modification procedures were developed to adapt the P-220 and KB-14A cameras to the operational and installation requirements. Because of increasing demand for high altitude cameras with compactnessAND OPERATING FEATURES OF THE MODIFIED P-220 camera, it was desirable to consolidate and optimize these features into a single over-all design with suitable engineering drawings. The report covers redesign work accomplished on the P-220 and KB-14A cameras and includes the applicable engineering drawings. Lack of a fully effective film flattening device in the present P-220 camera led to the development of a more effective method of flattening the film employing completely different principles of operation. The existing pressure plate applies a constant pressure on the film at the edges of the image format. As the pressure is not applied over the entire format, the film is not held precisely in the focal plane at all points within the format area. The report covers incorporation of a retractable pressure plate in the magazine, and a fixed glass plate in the body of the P-220 and KB-14A cameras to accurately locate the focal plane. Author
APPROVED FOR PUBLIC RELEASE