Where are pitot tubes commonly mounted and static ports located to sample undisturbed air?

• A. On the wing and on the fuselage
• B. On the nose and tail
• C. On the tail and on the wing
• D. On the landing gear

Answer: (A)

Sampling undisturbed air is essential for accurate readings from the pitot-static system. The pitot tube measures total (ram) pressure as air flows into it, while the static ports measure the ambient atmospheric pressure. If these sensors sample air disturbed by the aircraft’s own surfaces or movements, the pressures become biased and the instruments misread airspeed, altitude, or vertical speed.

That’s why the pitot tube is placed where the airflow is clean, typically on the wing, and why the static ports are placed on the fuselage sides where the air around the body is less affected by wing or tail wake. Locations like the tail or landing gear would introduce turbulent, non-free-stream air to the sensors, causing errors. With this arrangement, readings stay representative of the surrounding air, leading to accurate instrument indications.