R-7 Semyorka

The R-7 Semyorka is a Soviet rocket family derived from the first successful intercontinental ballistic missile. Its descendants became launch vehicles for Sputnik, crewed spaceflight, and later spacecraft.

R-7 (missile): The original Soviet intercontinental ballistic missile that first successfully flew in 1957. The missile was the family’s starting point and established its basic architecture.
Sergei Korolev: The Soviet engineer who led the design bureau responsible for the R-7 and early Soviet space launchers. Korolev directed the bureau that turned the missile design into a space-launch system.
Sputnik launch vehicle: The modified R-7 launcher used to place Sputnik 1 and Sputnik 2 into orbit. It was the family’s first operational space-launch adaptation.
SM-65 Atlas: The first operational United States intercontinental ballistic missile, later adapted as a space launch vehicle. Atlas was the R-7’s American counterpart and also transitioned from missile to launcher.
RD-107: A Soviet rocket engine used on the R-7’s four strap-on boosters. These engines powered the boosters that lifted the launch vehicle from the pad.
OKB-1: The Soviet experimental design bureau led by Sergei Korolev, later known as TsKBEM and NPO Energia. OKB-1 designed the R-7 and its early launch-vehicle derivatives.
Vostok rocket: A Soviet launch vehicle derived from the R-7 and used for early crewed and uncrewed missions. Its flights carried Yuri Gagarin and the first generation of Vostok spacecraft.
R-16 (missile): A Soviet second-generation intercontinental ballistic missile developed by Mikhail Yangel’s design bureau. Unlike the R-7, the R-16 used storable propellants and was better suited to rapid deployment.
RD-108: A Soviet rocket engine used in the R-7’s central core stage. Its four main chambers sustained thrust after booster separation.
Nuclear arms race: The postwar competition between the United States and Soviet Union to build and deploy nuclear weapons. The need to deliver nuclear warheads over great distances drove the R-7’s development.

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