Abstract: A device for generating transverse force on a ballistic missile mock-up for air tests by means of an installation including a mock-up launching tube adapted to slant at an angle and a recovery mock-up gantry composed of a support structure for the mock-up which is pivotably mounted to the recovery mock-up gantry so as to permit the support structure to slant to the same angle as the mock-up launching tube; a carrier provided with a guide along the support structure for supporting a mobile jack including a stem for adjusting the transverse force applied on one end of the stem which is in turn transmitted to the mock-up via another end of the stem; an adjustable assembly of loads for imparting a desired transverse force to the mock-up which are fixed to an end of a cable wound on an electric winch mounted at an upper end of the support structure, wherein the cable runs on return pulleys fixed to the carrier and wherein at least one of the pulleys is mounted on the stem of the jack so as to transmit the transver