7 INTERFERENCE TESTS ON AN N. A. C. A. PILOT TUBE turbulence increases, the point will move toward the face of the disk and become less distinct. It is planned to extend this phase of the work and, if possible, evolve a practical ''turbulence meter." … 0.1 0.2 0.4 0.60.8 I 2 4 6 8/0 Head of test section, cm of alcohol Fig. 10 TABLE I CALIBRATION OF N. A. C. A. PITOT-STATIC TUBES /ii = Pitot-static head indicated by calibrated service instrument. /J2=»= Pitot-static head indicated by instrument under test. TABLE II INTERFERENCE OF 3/8" (0.95 cm.)…
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