RD-171
E762097
The RD-171 is a powerful Russian liquid-fueled rocket engine, notable for being one of the most thrust-capable multi-chamber engines ever used in orbital launch vehicles.
All labels observed (6)
| Label | Occurrences |
|---|---|
| RD-171 canonical | 2 |
| RD-170 | 1 |
| RD-170 family | 1 |
| RD-170 rocket engine | 1 |
| RD-171 rocket engine | 1 |
| RD-171M | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8848203 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: RD-171 Context triple: [Zenit rocket, firstStageEngine, RD-171]
-
A.
RD-181
RD-181 is a Russian-built liquid-fueled rocket engine used to power the first stage of certain orbital launch vehicles, notably Northrop Grumman’s Antares.
-
B.
RD-180
The RD-180 is a Russian-built, two-chamber liquid-fueled rocket engine that has powered several American launch vehicles, notably variants of the Atlas V.
-
C.
RD-107
RD-107 is a Soviet-designed liquid-fueled rocket engine, best known for powering the first stages of early R-7 family launch vehicles used in historic missions like Sputnik and Vostok.
-
D.
RD-93
RD-93 is a Russian turbofan jet engine derived from the Klimov RD-33, optimized to power lightweight fighter aircraft such as the Pakistani-Chinese JF-17 Thunder.
-
E.
Raptor engine
The Raptor engine is SpaceX’s next-generation full-flow staged combustion methane-fueled rocket engine designed to power the Starship launch system.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: RD-171 Target entity description: The RD-171 is a powerful Russian liquid-fueled rocket engine, notable for being one of the most thrust-capable multi-chamber engines ever used in orbital launch vehicles.
-
A.
RD-181
RD-181 is a Russian-built liquid-fueled rocket engine used to power the first stage of certain orbital launch vehicles, notably Northrop Grumman’s Antares.
-
B.
RD-180
The RD-180 is a Russian-built, two-chamber liquid-fueled rocket engine that has powered several American launch vehicles, notably variants of the Atlas V.
-
C.
RD-107
RD-107 is a Soviet-designed liquid-fueled rocket engine, best known for powering the first stages of early R-7 family launch vehicles used in historic missions like Sputnik and Vostok.
-
D.
RD-93
RD-93 is a Russian turbofan jet engine derived from the Klimov RD-33, optimized to power lightweight fighter aircraft such as the Pakistani-Chinese JF-17 Thunder.
-
E.
Raptor engine
The Raptor engine is SpaceX’s next-generation full-flow staged combustion methane-fueled rocket engine designed to power the Starship launch system.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf | liquid-fueled rocket engine ⓘ |
| application | first-stage propulsion ⓘ |
| category | orbital launch vehicle engine ⓘ |
| chamberPressure_bar | ~245 ⓘ |
| combustionChamberArrangement | clustered around central turbopump ⓘ |
| combustionType | closed-cycle ⓘ |
| coolingMethod | regenerative cooling ⓘ |
| countryOfOrigin | Russia ⓘ |
| derivedFrom | RD-170 NERFINISHED ⓘ |
| designBureau | NPO Energomash NERFINISHED ⓘ |
| developedBy | NPO Energomash NERFINISHED ⓘ |
| engineCycle | oxidizer-rich staged combustion ⓘ |
| family | RD-170 engine family NERFINISHED ⓘ |
| fuel | RP-1 kerosene ⓘ |
| fuelMixtureRatio_OxToFuel | ~2.6 ⓘ |
| hasGimbalRange | several degrees per chamber ⓘ |
| hasSuccessor | RD-171MV NERFINISHED ⓘ |
| hasVariant |
RD-171M
NERFINISHED
ⓘ
RD-171MV NERFINISHED ⓘ |
| ignitionSystem | pyrophoric ignition ⓘ |
| introducedInDecade | 1980s ⓘ |
| isGimballed | true ⓘ |
| isMultiChamberEngine | true ⓘ |
| isReusable | no ⓘ |
| mountingConfiguration | single engine with four nozzles ⓘ |
| notableFor |
one of the most powerful liquid rocket engines ever flown
ⓘ
very high sea-level thrust ⓘ |
| numberOfCombustionChambers | 4 ⓘ |
| oxidizer | liquid oxygen ⓘ |
| propellantType |
kerosene (RP-1)
ⓘ
liquid oxygen (LOX) ⓘ |
| specificImpulseSeaLevel_s | ~309 ⓘ |
| specificImpulseVacuum_s | ~337 ⓘ |
| stage | first stage ⓘ |
| status | operational ⓘ |
| throttleCapability | limited throttling ⓘ |
| thrustAtSeaLevel_kN | ~7400 ⓘ |
| thrustInVacuum_kN | ~7900 ⓘ |
| usedBy |
Russian space program
NERFINISHED
ⓘ
Sea Launch NERFINISHED ⓘ Soviet space program NERFINISHED ⓘ |
| usedFor | orbital launch vehicles ⓘ |
| usedOnLaunchVehicle |
Zenit-2
NERFINISHED
ⓘ
Zenit-3F NERFINISHED ⓘ Zenit-3SL NERFINISHED ⓘ Zenit-3SLB NERFINISHED ⓘ |
| usedOnRocketFamily | Zenit family NERFINISHED ⓘ |
| usesCommonTurbopump | true ⓘ |
| usesTurbopumps | true ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: RD-171 Description of subject: The RD-171 is a powerful Russian liquid-fueled rocket engine, notable for being one of the most thrust-capable multi-chamber engines ever used in orbital launch vehicles.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
RD-171M
this entity surface form:
RD-170 rocket engine
this entity surface form:
RD-171 rocket engine
this entity surface form:
RD-170
this entity surface form:
RD-170 family