The article presents the calculation of the optimal diameter of the mesh channel of the air intake of the propulsion system of a small spacecraft, which operates on outboard air. Graphs of the dependence of the efficiency of the air intake on its diameter, the dependence of the mass flow rate of particles m on the diameter of the air intake are obtained. The analysis of the environmental friendliness of creating a propulsion system by the EIO method is carried out. The assessment of the harmfulness effect of the device on the environment during its operation was carried out.
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