| Development of Russian space military technology КОСМИЧЕСКИЙ АППАРАТ «AMAZONAS» The propulsion system has four 549-liter tanks and uses monomethyl hydrazine (MMH) as a propellant and nitrogen tetroxide NTO as an oxidizer. The subsystem includes two solar panel wings, each having an autonomous actuator, two lithium-ion batteries, a power supply control system, a pyrotechnic unit, a relay and a number of fuses to protect the bus, as well as distribution devices and overload protection systems. The core structure consists of conic- and cylinder-shaped shells made of reinforced composite plastic. Honeycomb panels around the core form walls for attaching the spacecraft (SC) equipment. The SC attitude is smoothly controlled without using attitude control thrusters. The Communications Module consists of (i) two walls on which heat dissipation devices reside and (ii) an upper level under which passive demultiplexer and input switch units are located. The Proton launch vehicle consists of three stages and a space head, the latter can be equipped with an additional upper stage. The Proton first stage consists of a central block containing the adapter, the oxidizer, and the tail section and surrounded by six lateral blocks. All the lateral blocks are similar in design. Each block includes the fore section, the fuel tank and the tail section where the rocket engine is fixed. The first stage is powered by six RD-275 single-chamber cruise liquid propellant engines developed and ... |
