rweights equalized along the main knife-edge. The positions (fig. 5), which may be applied as needed by means of of these seats are adjustable along the secondary knife- motor-driven camshafts. edge in the direction of the tunnel axis by means of Model support.—The models are held in the tunnel the… … two independent sets of static-pressure orifices and Fioote 9—Photograph of an airfoil model mnrmtivl In the tunnel at a positive angle of attack manometers are used to measure the air velocity. screw assembly is free to rotate about a vertical Each manometer is connected between a set of four axis…
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