The mathematical simulation of physical interaction between targets and a group of variously sized particles imitating a stream of technogenic fragments in near space is a promising method of gaining reliable data about the dynamics of the total process of a group impact and its consequences [1]. The comprehensive experimental and theoretical analysis of this complicated problem must involve the following components: the development of methods and devices for the launching of a group of particles under laboratory conditions in air and in vacuum, the experimental investigation of an impact of particles with targets and its consequences for protected samples, and numerical simulation with development of an adequate closed procedure for calculation of the impact of a group of fragments with targets imitating the protection of space equipment and directly with the space-apparatus construction. Among a large variety of possible systems of controlled launching of a fragment stream under laboratory conditions, assemblies using the aerodynamic principle of the step-by-step separation of a launched construction are of considerable interest, because they require no additional power supplies to provide a given orientation of fragments in the group. In this case, it is necessary to organize the process of separation of various trays and leading facilities in a possibly short time interval [2]. 1. In this study, we use the launching of a group of particles (from 2 to 12) in air on the basis of the separation of compound systems which were composed of identical bodies sequentially so that their longitudinal axes coincided or were parallel to each other and to the longitudinal axis of the whole system [3]. In this case, we provided the process of the directed ejection of fragments from a container under the action of aerodynamic forces. The basic experiments were carried out on a ballistic path with gunpowder and light-gas launchers of various calibers. As model technogenic fragments, we took balls and L / D = 1 cylinders from engineering materials. In a number of sections on the ballistic path, the flow around for separating assemblies was made visible by the “luminous-point” method [2]. The range of initial velocities of motion for an assembly in air varied within the range 500‐3500 m/s. Parametric investigations showed that the motion and the scattering of the compound system as a whole can be purposefully controlled by choosing the corresponding values of aerodynamic and mass‐geometric characteristics of constituent bodies of an assembly [4]. To launch a particle group, we fabricated a container that ensured the safety of the fragment-group composition in moving along the barrel channel and their controlled scattering at a given point of a trajectory. The container was cylinder-shaped. Its head section was a flat end, a truncated cone, or a needle. The motion of a group of fragments with the parameters controlled over the front (perpendicularly to the direction of motion) and over the depth (along the trajectory of motion) was provided by two methods of the directed ejection of particles from the container under the action of aerodynamic forces. The first method was ejection through the lateral surface at a certain angle to the direction of motion of the container. Ejection of particles through the lateral surface of the container was investigated for a cylinder with an axial channel that was made through the front-end side and that branched into a number of radial channels. The channels were connected with the cavities in which ejecting fragments were placed. Arranging the axial and radial channels with given diameters, one can obtain various positions of the model particles over front and depth. Figure 1 shows a shadow photograph of the motion of the container and a group of two spherical steel fragments each 7.5 mm in diameter. The velocity of bodies corresponds to the Mach number M = 3.1. It is seen in the photograph that the centers of mass of the particles are at the same depth, yielding a simultaneous impact with the target, the so-called “frontal impact.” In the second case, indentations arranged in a given sequence were made at