Aerodynamic measurement probe with evacuation of penetrated liquid by gravity

An aerodynamic measurement probe intended to measure a local angle of attack of an airstream flowing along the fuselage of an aircraft, the measurement probe comprising:

• a support and a shaft that is able to rotate about a longitudinal axis with respect to the support, a cover secured to the support and including an opening, a disc disposed opposite the opening in the cover secured to the support, and a plurality of successive chicanes provided between the support and the shaft, the plurality of successive chicanes formed about the longitudinal axis by grooves in the cover that cooperate with grooves in the disc;
• each chicane configured to oppose a penetration of liquid through the opening and to allow for transporting liquid that has penetrated into the chicane:
• along a first path, under the effect of gravity, towards an evacuation circuit associated with the chicane and formed in the support, and
• along a second path, and counter to the effect of gravity, towards a successive chicane or towards the shaft;
• the evacuation circuit of each of the chicanes allows for evacuating liquid out of the support under the effect of gravity moving away from the shaft.