Improvements to multifunction aircraft probes

Improved multifunction probe having circumferentially spaced pairs of sensing parts (22,24). An elongate, conically shaped probe element is rotatable about an axis. A central pressure port (20) picks up dynamic pressure. A pair of inner pneumatic ports (22,24) in slit shape is symmetrically arranged at a first angle from the central port, e.g. 45 degrees, and dedicated to angle of attack measurements. A pair of outer pressure ports (26) is arranged at a larger angle, e.g. 90 degrees, and dedicated to air data pressure sensing.