RD874
Yuzhnoye Design Bureau
The RD874 is the integrated first stage propulsion system for Cyclone-4M and Cyclone-5 launch vehicles, comprising four clustered RD870 engines that together provide roll, pitch, and yaw control through individual gimballing. Employing tried-and-tested technologies of the Zenit launch vehicle and burning liquid oxygen and kerosene, the combined system produces 319.2 tf of sea-level thrust and […]
Key figurescomparable across the catalogue
- Mass
- 6,070 kg
- Thrust
- 319.2 N
- Specific impulse
- 303.2 s
- TRL
- 6
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Propellants
- Liquid oxygen + kerosene
- Sea Level Thrust
- 319.2 tf
- Vacuum Thrust
- 356.4 tf
- Specific Impulse (sea level)
- 303.2 s
- Specific Impulse (vacuum)
- 338.7 s
- Propellant Mixture Ratio
- 2.68
- Number of Starts
- 1
- Number of Engines
- 4 x RD870
- Dry Weight
- 6,070 kg
- TRL
- 6
About
The RD874 is the integrated first stage propulsion system for Cyclone-4M and Cyclone-5 launch vehicles, comprising four clustered RD870 engines that together provide roll, pitch, and yaw control through individual gimballing. Employing tried-and-tested technologies of the Zenit launch vehicle and burning liquid oxygen and kerosene, the combined system produces 319.2 tf of sea-level thrust and 356.4 tf of vacuum thrust, with specific impulses of 303.2 seconds at sea level and 338.7 seconds in vacuum. The propellant mixture ratio is 2.68 with a single combined start. Dry weight of the four-engine cluster is 6,070 kg. The RD874 has achieved Technology Readiness Level 6, confirming demonstration in a relevant environment through Cyclone-4M ground development and testing.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.