The invention concerns a free fall simulator, characterized in that it comprises: a lower compression chamber (22) proximate the lower periphery wherefrom emerge the outputs of a plurality of ventilators (24) arranged in centripetal configuration, and the tapered upper part of which is arranged a compression grid (30), a cylindroid chamber (36) defining a displacement space, which is located just above the compression chamber (22), and which is designed to be traversed by a homogeneous rising air stream having a gradient of constantly decreasing upward speeds.