Design
The Angara rockets have a modular design similar to the Evolved Expendable Launch Vehicle, based on a common Universal Rocket Module (URM). Depending on configuration, the first stage can consist of 1, 3, 5 or 7 such modules. Unlike EELV launchers, Angara will not employ solid rocket boosters (SRB).
The URM is a unitary structure that includes an oxidizer tank, a fuel tank (both tanks being coupled by a spacer) and a propulsion bay. Each URM will have one single-chamber RD-191 engine, using liquid oxygen and RP-1 as fuel. The RD-191 design is based on the RD-170 four-chamber engine used by the Energia launcher, as well as on the RD-171, which is currently used by the Zenit rocket.
The second stage will be either a Briz-KM (Angara 1.1) or Block I (also called URM-2), which is powered by the RD-0124A engine developed by the KB Khimavtomatika. Angara 5 will use either the Briz-M upper stage (currently used for the Proton-M rocket), or KVRB. Most versions are intended for unmanned launches, but Angara A5P and Angara A7P are being designed to be capable of launching manned spacecraft.
A single launch pad can be used for launching all Angara versions except Angara A7.
Read more about this topic: Angara (rocket Family)
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