RD-191
Russian rocket engine / From Wikipedia, the free encyclopedia
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The RD-191 (Russian: РД-191, Ракетный Двигатель-191, lit. 'Rocket Engine 191') is a high-performance single-combustion chamber rocket engine, developed in Russia and sold by Roscosmos.[3] It is derived from the RD-180 dual-combustion chamber engine, which itself was derived in turn from the four-chamber RD-170 originally used in the Energia launcher.
Quick Facts Country of origin, Date ...
Country of origin | Russia |
---|---|
Date | 2001 |
Designer | NPO Energomash |
Manufacturer | NPO Energomash / Proton-PM (in transition) |
Application | Main engine |
Predecessor | RD-170 |
Status | In use |
Liquid-fuel engine | |
Propellant | LOX / RP-1 |
Mixture ratio | 2.6 |
Cycle | Oxidizer-rich staged combustion |
Configuration | |
Nozzle ratio | 37:1 |
Performance | |
Thrust, vacuum | 2.09 MN (470,000 lbf) at 100% throttle |
Thrust, sea-level | 1.92 MN (432,000 lbf) at 100% throttle |
Throttle range | 27–105% |
Thrust-to-weight ratio | 89 |
Chamber pressure | 25.8 MPa (3,740 psi) |
Specific impulse, vacuum | 337 s (3.30 km/s) |
Specific impulse, sea-level | 310.7 s (3.047 km/s) |
Burn time | 325 s (Angara A5 core stage) |
Gimbal range | 8° |
Dimensions | |
Length | 4 m (160 in) |
Diameter | 1.45 m (57 in) |
Dry weight | 2,290 kg (5,050 lb) |
References | |
References | [1][2] |
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The RD-191 is fueled by a kerosene / LOX mixture and uses an oxygen-rich staged combustion cycle. In the future the engine is expected to become a workhorse in the Russian space sector, as older launch vehicles are phased out of production and service.