Soyuz-2.1v

The Soyuz-2.1v, with the GRAU index 14A15, was a Russian expendable small-lift launch vehicle developed as a derivative of the Soyuz-2 series and originally known as Soyuz-1 during early development. Built by the Progress Rocket Space Centre in Samara, it is notable as the first R-7 variant to omit the four strap-on boosters of the rest of the family. Its single core stage is powered by the NK-33 engine, originally built in the 1970s for the Soviet N1 Moon rocket, with the RD-0110R vernier engine for steering, and its second stage is the same as the third stage of the Soyuz-2.1b, with a single RD-0124 engine. Most missions also use the Volga upper stage, a lighter and cheaper alternative to the Fregat. Optimised for small payloads, it can deliver up to 2,850 kilograms to a 200 kilometre low Earth orbit at 51.8 degrees inclination from Baikonur, and 2,800 kilograms at 62.8 degrees from Plesetsk, which is the site its launches were conducted from.