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KVTK (rocket stage) : ウィキペディア英語版 | KVTK (rocket stage)
The KVTK ((ロシア語:Кислородно-водородный тяжёлого класса), Oxygen/Hydrogen Heavy Class) is a liquid oxygen/hydrogen upper stage for high energy orbits. The KVTK contains an RD-0146D engine and is designed for use on Angara rockets. KVTK would be the first hydrogen-powered upper stage for use on a Russian launch vehicle, although Khrunichev has previously produced a hydrogen-powered upper stage (KVD-1) for the Indian GSLV. KVTK is designed to provide up to five ignitions, allowing for complex orbital maneuvering, and have an on-orbit lifespan of up to nine hours. KVTK would allow an increase in payload to GTO of 20-50% compared to the Angara A5's standard Briz-M upper stage, powered by UDMH and N2O4. == Variants ==
The RCAF would be a smaller cryogenic stage carrying of propellant for the proposed Angara A3, while the KVSK-A7 would be a larger stage loaded with for the proposed Angara A7.
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