| 摘要 |
An air data sensor comprising an elongated probe having a standard, sharped edge, orifice pitot port or opening, and a tapered leading end that is elongated with respect to its lateral dimensions along the longitudinal axis of the probe. The leading end portion blends into the main portion of the probe at a desired relatively short distance downstream from the pitot port. The probe comprises a tube or barrel that can be rectilinear or circular in cross section. Sets of sensing ports are utilizied and at least one pair of ports is oriented on a common axis and facing in opposite directions. Reliable sensing can be obtained when two sets of oppositely facing ports are used with the axis of each set 90 DEG to the axis of the other set. By using the pressure sensed in more than one combination, that is by co-using the pressures, static pressure, impact pressure, angle of attack and angle of sideslip can be derived. The ports are positioned on the tapered forward section, rearwardly of the pitot port before the full size of the basic tube is reached, and are positioned very close to the leading end. The tapered forward section expands from the edge of the pitot port a short axial distance, not generally more than eight equivalent radii at the port location, and the ports are positioned greater than one and less than six equivalent radii aft of the pitot tip.
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