pitot-static tube


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pitot-static tube

A combination tube used in a pitot-static system, located on the fuselage of the aircraft. It measures the total, or ram, pressure, as well as static pressure. The ram pressure is used for the ASI (air-speed indicator) and the Mach meter. The static system is used for the altimeter and the vertical speed indicator. It consists of a pitot head, which measures the total pressure of the airflow. Vents or small holes on the side of the tube are used to pick up static pressure. See pitot pressure.
References in periodicals archive ?
Test Setup Dimensions Round Corrugated and Standard Spiral Duct Tests Nominal Duct Measured Duct [L.sub.[z-1]] [L.sub.[1-2]] Tail Duct Diameter mm Diameter m (ft) m (ft) Length (in.) mm (in.) m (ft) 203 (8) 203.2 (8.0) 2.8 (9.2) 5.3 (17.3) 1.1 (3.5) 356 (14) 358.1 (14.0) 4.6 (15.0) 9.1 (30.0) 1.5 (5.0) 508 (20) 508.0 (20.0) 6.1 (21.0) 12.8 (42.0) 2.1 (7.0) For tests conducted on corrugated ducts and conventional spiral ducts the pressure loss was measured using the static pressure ports of Pitot-static tubes mounted at the duct center-line at axial locations as prescribed by ASHRAE Standard 120.
Likewise standard spiral duct pressure loss data obtained using either Pitot-static tubes or wall static pressure taps with piezometer rings are depicted in Figure 6.
Like-wise, the static pressure upstream and downstream of the test section and the pressure loss indicated by the Pitot-static tubes was measured by means of electronic manometers having a readability of + or -0.25 mm (0.01 in.).