Soyuz-5 (rocket)

The current proposal is led by RKTs Progress, with support from Khrunichev and Makeyev, additionally, Energia would handle the launch site, and supply the optional Blok DM-03 third stage, while Roscosmos would finance the development through the Project Feniks under the 2016–2025 Russian space master plan. KazCosmos would also be a partner since the initial launch pad would be at Baikonur Cosmodrome Site 45 in Kazakhstan, within the framework of the Baiterek bi-national joint venture, and International Launch Services (ILS) would commercialize its services for the international market. Four test launches are planned before the development is considered complete. International sanctions following the Russian Invasion of Ukraine further slowed operations. In July 2022, Dmitry Rogozin, then CEO of Roscosmos, admitted that construction would be postponed by six months to one year. == Vehicle ==

Soyuz-5, as proposed in 2016, leverages existing propulsion and tooling, while enabling a platform that would replace the lost capabilities of the Zenit family, replace the Proton Light/Medium, and could serve as the boosters of a new super heavy rocket. It will initially be a two-stage rocket, but could be enhanced with an optional Blok DM-03 for geostationary missions. It would be compatible with most of the Zenit's ground infrastructure, and even use the Site 45 at Baikonur. With a gross mass of against Zenit , and the improved efficiency of its second stage, it could launch to a 200 km circular orbit with an inclination of 51.6° to the Equator from Baikonur. This is a significant improvement over Zenit, which could only place roughly to the same orbit. For geostationary launch missions, it could optionally be equipped with a Blok DM-03 third stage. Since it would use the same propellant and is already used on the Zenit-3SL and Angara A5, it would be a low risk option. The expected performance of to GTO and to GSO, it would improve over Zenit-3SLB and . == Soyuz-5 super-heavy lift launch vehicle (Yenisei) ==

The Irtysh first stage could be used as the boosters (and even core) of the super-heavy lift launch vehicle Yenisei capable of launching to low Earth orbit from Baikonur or Vostochny. Improving the performance to and even was considered possible with this architecture. While the current 2016-2025 plan for deep space exploration calls for the use of the heavy Angara A5V, it would just enable , requiring up to four launches for a single Moon mission, and would also require the use of expensive hydrogen as fuel. The Yenisei would simplify the mission while using readily available Irtysh first stages. == Launches ==