A static pressure sensing probe has an aerodynamically shaped cross section,
and
extends laterally from an aircraft surface sufficiently so that an outer end of
the probe is a short distance outside the boundary layer on the aircraft surface
on which the probe is mounted. The probe has surface corrugations or ridges along
the probe, and the ridges include an upstream ridge adjacent the leading edge,
and a downstream ridge spaced rearwardly from the upstream ridge. The ridges cause
pressure disturbances along the probe surfaces. Static pressure sensing ports are
positioned on the surfaces of the probe relative to the ridges in regions of pressure
disturbances caused by the ridges. The probes can be mounted on opposite sides
of the aircraft and pneumatically or electrically connected to average the pressures
from selected sets of ports.
