STRUT MOUNTED MULTIPLE STATIC TUBE

摘要

A strut mounted multiple static tube providing, as shown, multiple separate static pressure measuring systems and using one probe with separate sets of pressure sensing ports for each system. The probe is designed to have a surface configuration which provides substantially identical static pressure conditions at each set of sensing ports while the axial length of the barrel portion of the sensing probe is maintained at a minimum and the pressure effects from the adjacent structures such as the strut are compensated for. The structure includes a barrel portion of the probe having a surface annular wave pattern with sections of different diameters which causes large, uniform changes in the pressure pattern along the probe to provide areas of both positive and negative pressure levels for aerodynamic compensation. The positions for the ports for the separate systems are selected from a pressure profile of the probe so the ports are located at desired pressure areas.