Patent Document ID: 20100137069
Application ID: 11988602
Patent Flag: 0

Claim One:
1. A wind tunnel for training parachutists capable to provide an air flow, said tunnel comprising a channel including: an entrance confusor, a first working zone, an intermediate confusor, a second working zone, and a number of safety nets placed within the channel; wherein said entrance confusor, first working zone, intermediate confusor, and second working zone being sequentially installed and interconnected; wherein said tunnel characterized in that the working zones performed in a diffuser shape with different longitudinal flow velocity gradients, wherein the working zone with the less of said gradients made shorter and including an entrance section, the working zone with the greater of said gradients made longer; and the working zone with the greater gradient including at least one section perpendicular to the axis of the air flow and whose area equals to the area of said entrance section.