On the basis of approved calculation methods for the LV propellant tanks pres-surization systems, the basic aspects of the approximate modelling of their parameters are considered at experimental development in ground conditions. A number of relations is considered for definition of modelling conditions and transfer of experimental data obtained on models onto real LV. With the help of several scale models, the Ze-nit LV propellant tanks pressurization systems have been developed by the proposed method effectively and reliably enough.
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