It is a unique system capable of operating (depending on the location of the aircraft) in the air or missile mode. In other words, a spacecraft will “feel” itself equally comfortably in the atmosphere and in the conditions of space.
The future combat aerospace complex takes off from the usual runway, like a fighter-interceptor, which, for example, having received the task of liquidating the combat blocks of ballistic missiles, will rush into the near space, and, having accomplished the task set, will return in “airplane” mode on its base. At the initial and final stage, the engine operates on kerosene, and in space passes to methane and gaseous oxygen.
Two enterprises of the Russian military-industrial complex and NGO Molniya responded to the proposal of military missile engineers to take part in the project of the future aircraft, which took over the development of the NIR.