The Soyuz-U2 (GRAU index 11A511U2) was a Soviet later Russian carrier rocket. It was derived from the Soyuz-U and a member of the R-7 family of rockets. It featured increased performance compared to the baseline Soyuz-U due to the use of syntin propellant as opposed to RP-1 paraffin used on the Soyuz-U.The increased payload of the Soyuz-U2 allowed heavier spacecraft to be launched while lighter spacecraft could be placed in higher orbits compared to those launched by Soyuz-U rockets.
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