The N.A.C.A. Photographic Apparatus for Studying Fuel Sprays from Oil Engine Injection Valves and Test Results from Several Researches (1928)
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rs governing the characteristics of oil sprays. DESCRIPTION OF THE N. A. C. A. SPRAY PHOTOGRAPHY APPARATUS DEVELOPMENT OF THE APPARATUS The problems involved in taking moving pictures of oil sprays from injection valves pre- sented numerous difficulties. The two outstanding problems were: The… … Fig. 1—Diagrammatic arrangement of spray-photography apparatus duration of exposure necessary can be computed by assuming that the spray has an initial velocity of 500 feet per second, or 6,000 inches per second, and permitting a distortion of one one-hundredth inch of the spray image recorded on a…
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