RD-120MS
Glavkosmos
RD-120MS is a modification of the RD-120 liquid rocket engine with afterburning of oxidizing gas, intended for the upper stages of promising Russian and foreign launch vehicles.
Key figurescomparable across the catalogue
- Mass
- 1,450 kg
- Largest dimension
- 4,714 mm
- Thrust
- 93 N
- Specific impulse
- 351 s
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
- Thrust, earth / void, tf
- - / 93
- Specific impulse, earth / void
- - / 351 s
- Pressure in the combustion chamber, kgf/cm2
- 181.6
- Weight, dry / dipped
- 1450/1610 kg
- Dimensions height / diameter
- 4714/2600 mm
- Development period
- Basic - since 1976, forced - 2001-2003 modification - 2019-2022
- Thrust vector control (2 channels) due to camera swing in two planes
- 4 °
- Thrust range
- 100-78 %
- Purpose
- For the upper stages of promising Russian and foreign launch vehicles
- Year of release
- 2022
- Flight qualification of the product
- No
- Brief history of flight qualification
- The engine prototype was used at the 2nd stage of the Zenit launch vehicle
- Possibility to adapt the product to customer requirements
- Yes
About
RD-120MS is a modernized version of the RD-120 liquid rocket engine, using an oxidizer-rich staged combustion cycle (afterburning of oxidizing gas), designed for the upper stages of promising Russian and foreign launch vehicles. It runs on oxygen and kerosene propellants and incorporates a number of new technologies in its design. The engine can be adapted to customer requirements. Thrust vector control is achieved via camera (chamber) swing in two planes across 2 channels. The basic RD-120 engine was developed from 1976 to 1985, with its first flight on the Zenit launch vehicle on April 13, 1985. The modernized, boosted RD-120 (thrust increased up to 93 tf) first flew on a Zenit launch vehicle under the Sea Launch program on February 28, 2005. The RD-120MS itself was released in 2022 following forced development in 2001-2003 and modification in 2019-2022; the product has not yet achieved flight qualification, though the engine prototype (RD-120/boosted RD-120) was used on the 2nd stage of the Zenit launch vehicle. In total, 295 engines of the RD-120 family were manufactured, with 588 bench fire tests conducted totaling 141,608 seconds of operating time.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.