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If you have ever wanted to experience the rush of skydiving, but were a little intimidated by the process of intensive training and jumping out of a plane at fourteen thousand feet in the air, then there is good news. Vertical wind tunnels simulate the same experience, and they are much closer to the ground. VWTs blow air through a tall tunnel structure, simulating the parachute jump experience. This is called indoor skydiving and the sensation of floating on air is called a body flight.

The history of skydiving indoors dates back to 1964, when the U.S. military started building vertical wind tunnels to enhance army parachute training of their soldiers. The first VWTs for use by the general public opened in 1982 in Las Vegas and Tennessee. Though these tunnels were lots of fun, they only approximated how the true free-fall parachute jumps actually felt, and were pretty difficult to master.

Indoor skydiving is said to be the art of flying with your body, yet in a controlled environment. Control includes rolls, rate of fall, turns, lateral movements and other acrobatic stunts. Honing these body flight skills helps skydivers get closer to each other while free-falling so that they can link for formation skydiving and then release away from each other again so that they reach a safe distance in order to pull their parachute cord.

Indoor vertical wind tunnels have two sub-categories: non-re-circulating and re-circulating. Non-re-circulating wind tunnels typically suck air through inlets found in the bottom portion of the building in which they are housed. The air is then pushed up the body flight area, and then exits through the top portion of the structure. The re-circulating type of VWT creates an aerodynamic loop that has turning vanes, which are similar to wind tunnels used in labs, but have a vertical loop and a body flight chamber inside the vertical section of the loop. Re-circulating tunnels are generally used in places where the climate is just too cold to use the non-re-circulating type. Indoor vertical wind tunnels tend to have a smoother and more controlled airflow than outdoor VWTs. They also have much more control of the temperature inside, providing year-round body flights in cold climates.

As the years have progressed, skydivers have begun to realize that indoor skydiving can take them to the next level. Those who did their parachute training in vertical wind tunnels started dominating skydiving competitions. It quickly became clear that VWTs were the ultimate training tool, as they adequately simulate free-falling.

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