Cylindrical five-holes probe
Variants of the previous instrument are a cylinder with hemispherical head (Figure 2.29), a truncated pyramid (Figure 2.30) or a truncated cone. The advantage of these probes compared to the spherical probe is the elimination of separation.
These probes measure the angles of pitch and yaw of the stream, the stagnation and the dynamic pressure; therefore provide sufficient data to fully calculate the fields of velocity and pressure. The maximum measurable angle is about 60°.