There is special technology behind flying without a parachute


The wind tunnel consists of an underground reinforced concrete tub and steel construction. This is the carrying element of the aerodynamic tunnel as a whole. The fibreglass nozzle in the middle of the tub concentrates air into the glass cylinder itself, which we call the flight chamber. This consists of 6 segments of tempered safety glass 21.6 mm thick.
In terms of numbers, the external dimensions of the wind tunnel, including the concrete tub and sheathing, are:

Length: 30 metres
Width: 10 metres
Height: 30 metres

The concrete tub is usually located up to 14 metres below the ground. It is sufficiently deep to achieve the needed speed and linearity of air as well as stability of the technology as a whole. The flight chamber, made of tempered glass, is placed on the concrete tub and fixed at the top to the steel construction and air conduit. The bottom of the flight chamber is round, 4.3 metres in diameter and 14 metres high, this is where flight without a parachute happens.

The airflow consists of four vertical ventilators, each 3.15 metres in diameter. Each ventilator has its own coaxially connected electric motor with a maximum output of 355 kW. The ventilators press the air in the closed cycle in two branches along the sides of the building downwards to the concrete tub. There, the two airflows merge and subsequently accelerate through the nozzle into the flight chamber. From there the air is divided again under the roof of the building and directed to the ventilators by the air conduits.

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