In moderately strong winds, how far downwind of an obstacle would you expect to find turbulence?

In moderately strong winds, understanding the impact of obstacles on airflow is crucial for ensuring safe skydiving landings. The correct response indicates that turbulence can be expected 10-20 times the height of the obstacle. This range is based on aerodynamic principles, where the wind interacts with tall structures, creating turbulence that can extend a significant distance downwind.

When wind flows over or around an obstacle, the disturbance created affects the surrounding airflow. The turbulence produced is influenced by factors such as the shape and height of the obstacle and the wind speed. The specified distance of 10-20 times the height of the obstacle provides a guideline for skydivers to assess potential turbulence risks when approaching landing areas that feature obstructions like buildings, trees, or hills.

Understanding this distance helps skydivers plan their descent and approach strategies to avoid entering turbulent air, which can lead to unpredictable flight conditions and compromise safety. Recognizing the extent of turbulence influenced by obstructions enables skydivers to make informed decisions and maintain control during their descent.