👉 Pneometry is a measurement technique used in aircraft and spacecraft to measure the velocity of air passing through a small opening. It involves using a device that measures the pressure difference between two points, which can be either inside or outside an opening. The resulting pressure difference is then converted into an equivalent velocity of air flow within the opening, allowing for precise measurements of airflow rates and pressures in aircraft and spacecraft. This measurement is critical for ensuring safe operations, especially in environments with high velocities of air.