Collection: Pitot pressure - Prandtl - Pitot tube

The Prandtl probe (named after Ludwig Prandtl), also known as a Prandtl Pitot tube, is a fluid dynamics measuring instrument for determining dynamic pressure. It is a combination of a Pitot tube and a static pressure probe. The Prandtl tube has an opening facing the direction of flow for measuring the total pressure and, at a precisely calculated distance from the tip and shaft, ring-shaped lateral holes for static pressure measurement. According to Bernoulli's law, the difference between these two pressures corresponds to the dynamic pressure (dynamic pressure). Dynamic pressure can be determined directly using a manometer; alternatively, the velocity of the air flowing around the probe can be calculated using the dynamic pressure. This is important in aviation for determining air speed (cf. true airspeed). The Prandtl probe is usually part of a Pitot-static system.