RD-170
The RD-170 (Russian: РД-170, Ракетный Двигатель-170, tr. Raketnyy Dvigatel-170) is the world's most powerful and heaviest liquid-fuel rocket engine. It was designed and produced in the Soviet Union by NPO Energomash for use with the Energia launch vehicle. The engine burns kerosene fuel and LOX oxidizer in four combustion chambers, all supplied by one single-shaft, single-turbine turbopump rated at 170 MW (230,000 hp) in a staged combustion cycle.
1:1 scale model of an RD-170 rocket engine, shown upside down | |
| Country of origin | Soviet Union/Russian Federation |
|---|---|
| First flight | 1985-04-13 |
| Manufacturer | NPO Energomash |
| Application | Main engine |
| Associated LV | Energia |
| Successor | RD-171M |
| Status | Retired |
| Liquid-fuel engine | |
| Propellant | LOX / RP-1 |
| Mixture ratio | 2.63 |
| Cycle | Oxidizer-rich staged combustion |
| Configuration | |
| Chamber | 4 |
| Nozzle ratio | 36.87 |
| Performance | |
| Thrust, vacuum | 7.90 MN (1,780,000 lbf) |
| Thrust, sea-level | 7.25 MN (1,630,000 lbf) |
| Throttle range | 100–40% |
| Thrust-to-weight ratio | 82:1 |
| Chamber pressure | 24.52 MPa (3,556 psi) |
| Specific impulse, vacuum | 337 s (3.30 km/s) |
| Specific impulse, sea-level | 309 s (3.03 km/s) |
| Burn time | 150 seconds |
| Dimensions | |
| Length | 4.0 m (160 in) |
| Diameter | 3.8 m (150 in) |
| Dry weight | 9,750 kg (21,500 lb) |
| Used in | |
| Energia | |
| References | |
| References | |
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