peed intersect in the chart at a point If an altimeter is used to determine the altitude it between two diagonals reading 180 and 190 at the must be set in the manner discussed in the preceding right, giving 189 miles per hour as the true air speed. paragraph. If so set and if the altimeter has… … 85 30 Standard altitude, thousand feet Figure 3.—Chart for obtaining the true air speed for a given indicated air speed and standard altitude the "true" air speed will remain of the same order of Design of Pitot-Static Pressure Heads for magnitude as that due to air temperature. Aircraft To use the…
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