RD-0124

RD-0124 (14D23)

Country of origin	Russia
Date	1993-2006
First flight	2006-12-27
Designer	KBKhA (Chief designers: Valery Kozelkov, Viktor Gorokhov)
Manufacturer	Voronezh Mechanical Plant
Application	Upper Stage
Associated L/V	Soyuz-2
Predecessor	RD-0110
Status	In Production
Liquid-fuel engine
Propellant	LOX / RG-1
Cycle	Staged Combustion
Configuration
Chamber	4
Performance
Thrust (vac.)	294.3 kilonewtons (66,200 lbf)
Thrust-to-weight ratio	52.5
Chamber pressure	15.7 megapascals (2,280 psi)
Isp (vac.)	359 seconds
Burn time	300s
Dimensions
Length	1,575 millimetres (62.0 in)
Diameter	2,400 millimetres (94 in)
Dry weight	572 kilograms (1,261 lb)
Used in
Soyuz-2-1b and Soyuz-2-1v Block-I
References
References

The RD-0124 (GRAU Index 14D23) is a rocket engine burning liquid oxygen and kerosene in a staged combustion cycle. RD-0124 engines are used on the Soyuz-2.1b and Soyuz-2-1v. A slight variation of the engine, the RD-0124A, is used on the Angara rocket family URM-2 upper stage. RD-0124 is developed by Khimavtomatiki Design Bureau.

Design

RD-0124 engines use a multi-stage turbopump powered by pre-combustion of the engine propellants in the preburner. The kerosene fuel is used for regenerative cooling of the engine. Vehicle attitude control during ascent is provided by gimbaling the engine in two planes. The propellant tanks are helium-pressurized. Four combustion chambers are fed by a single turbopump system. The engine operates at a high chamber pressure and, for the type of propellants used, achieves a very high specific impulse.

History

The inaugural flight of a launch vehicle using an RD-0124 engine took place on December 27, 2006. Orbital Sciences considered using the RD-0124 in the High Energy Second Stage (HESS) for their Antares rocket. It would have replaced the Castor 30B second stage.

Versions

This upper stage engine has been adapted to two different launch vehicles, the Soyuz-2-1b/v and the Angara family. As such, there are different versions:

• RD-0124 (GRAU Index 14D23). It is the version for the Soyuz-2-1b and Soyuz-2-1v Blok-I. It is the first liquid rocket engine designed in Russia after the Soviet period.
• RD-0124A. It is the version that powers the Angara URM-2, both the 1.2 and the bigger 5 versions. It differs on the base model in having an extended burn time of 424 seconds and, at 548 kg (1,208 lb), being 24 kg (53 lb) lighter.
• RD-0124DR. Version developed between 2008 and 2013 for the Soyuz-2-3 project. It would differ from the base version in the implementation of a throttled point of 176.6 kN (39,700 lbf) with a reduced chamber pressure of 9.5 MPa (1,380 psi) and a specific impulse of 347s. The throttling capability meant a redesign of the preburner and the combustion chamber.
• RD-0125A. Single nozzle version of the RD-0124A, it is planned as an upgrade for the Angara URM-2. It would enable the use of dual engines, which would enhance performance and reduce launch cost. Probably only planned for the Angara-5 URM-2, which is bigger than the Angara-1.2's.

See also

• RD-0110 — previous engine.
• Soyuz-2-1b — first launch vehicle to use it.
• Soyuz-2-1v — second launch vehicle to use it.
• Angara — third launch vehicle to use it.
• Comparison of orbital rocket engines