Soyuz 11A510

Soyuz 11A510

The Soyuz 11A510 is a Soviet orbital launch vehicle developed and operated by the Soviet Space Program during the mid-1960s. A member of the broad and historically significant Soyuz rocket family — itself descended from the R-7 Semyorka, the world's first intercontinental ballistic missile — the 11A510 represents one of the specialized variants produced during a period of rapid Soviet expansion in space launch capability.

Design and Configuration

Standing 31 meters tall with a maximum diameter of 10.3 meters, the 11A510 follows the classic R-7-derived architecture that characterizes the Soyuz family: a central core stage flanked by four tapered strap-on boosters, giving the vehicle its distinctive and immediately recognizable silhouette. This configuration, refined over successive variants, provided the structural and aerodynamic foundation that made the Soyuz lineage one of the most reliable rocket families in spaceflight history. The vehicle is capable of delivering up to 4,500 kg to low Earth orbit, placing it in a capable medium-lift category suitable for a range of government payloads.

Operational History

Our flight record attributes two tracked flights to the 11A510, both conducted between 1965 and 1966, and both resulting in successful orbital insertions. This brief but unblemished operational window suggests the vehicle served a focused and specific mission role rather than acting as a general-purpose workhorse. The 11A510 launched exclusively on behalf of the Soviet Space Program, consistent with the tightly centralized nature of Soviet space activities during this era.

The two missions recorded in this database are Soyuz 11A510 | US-AO 1 and Soyuz 11A510 | US-AO 2. The "US-AO" designation points toward a category of Soviet military or research satellites, and the sequential numbering of these payloads indicates a planned, programmatic series rather than one-off launches. Like many Soviet missions of the period, operational details surrounding these payloads were not publicly disclosed at the time of flight.

Context Within the Soyuz Family

The Soyuz rocket family encompasses a large number of distinct variants, each denoted by a specific GRAU index such as the 11A510 designation used here. These variants were developed incrementally to meet evolving payload requirements, with modifications made to upper stages, fairings, and guidance systems depending on mission objectives. The 11A510 sits within the early generation of this family, contemporary with other mid-1960s Soviet launch efforts that supported both crewed spaceflight preparation and the deployment of military reconnaissance and communications satellites.

Launch operations for Soyuz-family vehicles during this period were conducted from Baikonur Cosmodrome in what is now Kazakhstan, the premier Soviet launch facility and the site from which Sputnik and Vostok had already made history. The combination of a proven launch site, a mature rocket lineage, and a 100% success rate across its recorded flights makes the 11A510 a quiet but reliable footnote in the broader story of Soviet launch vehicle development during the Space Race.