nment with the relative wind. Also several flights were made with a yaw meter head mounted in place of the Pitot static heads to determine the amount of yaw of the slipstream. PRECISION. The capsules used on the multiple recording manometer were calibrated against a water column before and after… … l ia. 2.~ Motimin^ oi V'nol sialic hoads. Flu. 3.—rniversally luoniiud I'iioi >iaiu- luispoed head. RESULTS. The results are plotted in Figui-es 4, 5, and 6. The slipstream velocities obtaine>El in the two runs made with the installation of heads on the opposite side of the airplane agree very…
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