The successful debut launch of Russia's Soyuz 5 rocket on April 30 marks a significant milestone for the nation's space ambitions. This new medium-lift vehicle, also known as Irtysh, is designed to modernize Russia's launch capabilities and eventually replace older rockets. From its powerful new engine to its role in future missions, here are 10 things you need to know about the Soyuz 5.

1. A Brand-New Medium-Lift Rocket

The Soyuz 5 is a two-stage medium-lift rocket developed by Russia's Progress Rocket Space Centre. It stands about 65 meters tall and is capable of delivering up to 17 tons to low Earth orbit. Unlike its predecessors, it uses a completely new main engine—the RD-171MV—which burns kerosene and liquid oxygen. This rocket is intended to bridge the gap between the smaller Soyuz-2 and the heavy-lift Angara rockets, providing a versatile option for various payloads. Its first launch on April 30 from Baikonur Cosmodrome was a textbook success, with all systems performing nominally.

2. The Debut Launch Was Flawless

Launched on April 30, 2025, at 10:24 AM local time from Site 81 at Baikonur, the Soyuz 5 carried a dummy payload simulating a large satellite. The rocket's first and second stages separated as planned, and the payload reached its intended orbit without any issues. Russian space officials declared the mission a complete success, noting that it validated several new technologies. The launch was delayed by a few weeks due to preflight checks, but the team worked through minor anomalies. This successful debut puts Russia on track for full operational flights later this year.

3. Powered by a Powerful New Engine

The first stage of Soyuz 5 is equipped with a single RD-171MV engine, an upgraded version of the legendary RD-170 used on the Energia rocket. This engine produces over 800 tons of thrust at sea level, making it one of the most powerful liquid-fuel rocket engines ever built. It features a combustion chamber with advanced cooling and a simplified design for cost-effectiveness. The engine is designed for reuse, with the first stage intended to be recovered after flight—a move toward partial reusability. This thrust gives Soyuz 5 a significant payload advantage over its predecessors.

4. Payload Capacity and Orbit Capabilities

Soyuz 5 can lift about 17 tons to low Earth orbit (LEO) and up to 5 tons to geostationary transfer orbit (GTO). This makes it ideal for launching large communications satellites, space station modules, and even crewed spacecraft. In fact, Russia plans to use Soyuz 5 for future missions carrying the new Orel (formerly Federation) crew vehicle. The rocket's performance is comparable to SpaceX's Falcon 9 (non-reusable mode) and China's Long March 5. Its versatility allows it to cover a wide range of commercial and government launch contracts.

5. Designed for Reusability

Unlike most Russian rockets, the Soyuz 5 was designed with reusability in mind from the start. The first stage is equipped with grid fins and landing legs, allowing it to return to a landing pad after separation. On the debut flight, the stage did not attempt a landing—it was a test of the booster's separation and engine performance. However, future flights will attempt to recover the first stage using a dedicated landing zone near Baikonur. Reusability could significantly lower launch costs, making Soyuz 5 more competitive in the global market.

6. A Replacement for Aging Workhorses

The Soyuz 5 is intended to replace both the Soyuz-2 and the Proton-M rockets over the next decade. The Soyuz-2 has been in service since 2004, while Proton dates back to the 1960s. Both have faced reliability issues and are becoming obsolete. Soyuz 5 offers a modern, reliable alternative with higher performance and lower operating costs. Russia also plans to phase out the Zenit rocket, which used Ukrainian components. By consolidating launches onto a single family of rockets (Soyuz 5 and Angara), Russia aims to reduce logistical complexity and improve launch cadence.

7. Role in the Russian Space Program

Soyuz 5 is central to Russia's future space plans. It will launch the Orel crew vehicle to the International Space Station (ISS) and eventually to a planned Russian orbital station (ROSS). It will also serve as a backup for Angara rockets in national security launches. The rocket is expected to perform routine resupply missions to the ISS, replacing the Progress cargo ship launches on Soyuz-2. Additionally, Russian space agency Roscosmos sees Soyuz 5 as a vehicle for commercial satellite launches, targeting the growing demand for medium-lift services.

8. Comparison with Other Rockets

In the global launch market, Soyuz 5 competes with rockets like the Falcon 9, Long March 5, and Ariane 6. Its payload capacity of 17 tons to LEO sits between the Falcon 9’s 22 tons (non-reusable) and the Long March 5’s 25 tons. However, Soyuz 5 uses a less expensive engine and simpler construction, which could give it a cost advantage if reusability is achieved. Unlike Falcon 9, which uses multiple engines, Soyuz 5 relies on a single powerful engine, reducing complexity. This makes it an attractive option for customers who need reliable medium-lift launches without the price tag of heavy-lift vehicles.

9. Future Missions and Upgrades

Following the successful debut, the next Soyuz 5 flight is expected in late 2025, carrying a real satellite payload. Roscosmos has signed contracts with both government and commercial customers for the coming years. An upgraded version, called Soyuz 6, is also in development, featuring a modified second stage and a larger payload fairing. This variant could increase LEO capacity to over 20 tons. A human-rated version for crewed missions is being developed in parallel, with a first crewed flight targeted for 2028.

10. Significance for Russia's Space Industry

The debut of Soyuz 5 represents a major step forward for Russia's beleaguered space industry, which has faced budget cuts, delays, and international sanctions. It demonstrates that Russia can still develop advanced rocket technology despite geopolitical challenges. The rocket's success could restore confidence among commercial customers and help Russia retain its share of the global launch market. Moreover, it sets the stage for future innovations like the Amur rocket (using methane engines) and the new orbital station. The Soyuz 5 is not just a new rocket—it's a symbol of Russia's determination to remain a major player in space exploration.

In conclusion, the Soyuz 5's flawless first flight marks a new chapter for Russian rocketry. With its powerful engine, reusability features, and versatile payload capacity, it is poised to serve as a workhorse for decades to come. As Russia prepares for crewed missions and commercial launches, the Soyuz 5 stands ready to carry the nation's ambitions into orbit. Keep an eye on this rocket—it's just getting started.