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Hydrodynamic and Aerodynamic Tests of Models of Flying-boat Hulls Designed Flow Aerodynamic Drag - NACA Models 74, 74-A, and 75 (1938)
NASA Technical Reports Server (NTRS) · leaf 27
Fig.(7a) N.A.C.A. Technical Note No.668 Figure 7(a). - Spray photographs of model 74-A free-to-trim.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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