|Voskhod launch vehicle
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Voskhod launch vehicle.
To launch the heavier payload, its rocket was equipped with a more powerful upper stage, which was borrowed from the Molniya booster. It enabled to add an extra ton of payload.
The modified rocket received a designation 11A57. (84) A similar vehicle -- 11A59 -- was also used to launch Zenit reconnaissance satellites.
A total of 299 vehicles under a designation 11A57 were eventually launched, including 14 that failed. However some of the third stages on 11A57 were equipped with the older RD-0108 engine, while the majority had RD-0110.
Separation of the third stage apparently filmed during the Voskhod mission.
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To carry a heavier Voskhod spacecraft, its launch vehicle was upgraded with a more powerful third stage.
Fueling of the 11A57 (Voskhod) rocket before launch. Credit: RKK Energia
Launch of the Voskhod-2 spacecraft.