Soyuz (rocket) in the context of "R-7 (rocket family)"

The Soyuz (Russian: Союз, meaning "union", GRAU index 11A511) was a Soviet expendable carrier rocket designed in the 1960s by OKB-1 and manufactured by State Aviation Plant No. 1 in Kuybyshev, Soviet Union. It was commissioned to launch Soyuz spacecraft as part of the Soviet human spaceflight program, first with eight uncrewed test flights, followed by the first 19 crewed launches. The original Soyuz also propelled four test flights of the improved Soyuz 7K-T capsule between 1972 and 1974. It flew 30 successful missions over ten years and suffered two failures.

The Soyuz 11A511 type, a member of the R-7 family of rockets, first flew in 1966 and was an attempt to standardize the R-7 family and get rid of the variety of models that existed up to that point. It was basically a Molniya 8K78M without the Blok L stage. It featured the 8D74M RD-107 and the RD-110 engines from the 8K78M, The new, uprated core stage and strap-ons became standard for all R-7 derived launch vehicles to replace the numerous older variants in use. The RD-0110 engine had been introduced on the 8K78M booster in 1964 and was also used in 11A511s due to its enhanced performance, while Voskhod boosters continued using the less powerful RD-0107.