RD-180
E415732
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| RD-180 canonical | 5 |
| RD-180 engine | 1 |
| RD-180 rocket engine | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4140206 — 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-180 Context triple: [Atlas V 541, firstStageEngine, RD-180]
-
A.
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.
-
B.
RS-68 engine
The RS-68 engine is a powerful liquid-fueled rocket engine used primarily on the Delta IV launch vehicle, known for its high thrust and simplified design for cost-effective heavy-lift missions.
-
C.
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.
-
D.
CE-20 cryogenic engine
The CE-20 cryogenic engine is an Indian-developed, liquid hydrogen–liquid oxygen rocket engine that powers the upper stage of ISRO’s heaviest launch vehicles for placing large payloads into orbit.
-
E.
Saturn AL-31F
The Saturn AL-31F is a Russian afterburning turbofan jet engine widely used to power modern Sukhoi fighter aircraft.
- 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-180 Target entity description: 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.
-
A.
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.
-
B.
RS-68 engine
The RS-68 engine is a powerful liquid-fueled rocket engine used primarily on the Delta IV launch vehicle, known for its high thrust and simplified design for cost-effective heavy-lift missions.
-
C.
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.
-
D.
CE-20 cryogenic engine
The CE-20 cryogenic engine is an Indian-developed, liquid hydrogen–liquid oxygen rocket engine that powers the upper stage of ISRO’s heaviest launch vehicles for placing large payloads into orbit.
-
E.
Saturn AL-31F
The Saturn AL-31F is a Russian afterburning turbofan jet engine widely used to power modern Sukhoi fighter aircraft.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
liquid-fueled rocket engine
ⓘ
rocket engine ⓘ |
| application | expendable launch vehicles ⓘ |
| belongsToEngineFamily |
RD-171
ⓘ
surface form:
RD-170 family
|
| chamberPressure | about 26.7 MPa ⓘ |
| combustionChamberArrangement | two side-by-side chambers with a common turbopump ⓘ |
| countryOfOrigin | Russia ⓘ |
| designedBy | Russian engineers at NPO Energomash ⓘ |
| designedForStage | first stage ⓘ |
| developedFrom |
RD-171
ⓘ
surface form:
RD-170
RD-171 ⓘ |
| developer | NPO Energomash ⓘ |
| engineCycle | oxidizer-rich staged combustion ⓘ |
| exportControlContext | subject to U.S.-Russia space cooperation agreements ⓘ |
| exportedTo |
United States of America
ⓘ
surface form:
United States
|
| firstFlightYear | 2000 ⓘ |
| firstUsedOn | Atlas III ⓘ |
| gimbalRange | about 8 degrees ⓘ |
| hasGuidanceControl | vectoring via gimbaled nozzles ⓘ |
| hasNozzleCount | 2 ⓘ |
| isReusable | no ⓘ |
| manufacturer | NPO Energomash ⓘ |
| notableFeature |
high chamber pressure for a kerosene engine
ⓘ
two-chamber design derived from four-chamber RD-170 ⓘ |
| numberOfCombustionChambers | 2 ⓘ |
| operatesWithMixtureRatio | LOX-rich mixture in preburner ⓘ |
| oxidizer | liquid oxygen ⓘ |
| poweredVehicleFamily |
Atlas V 400 series
NERFINISHED
ⓘ
Atlas V 500 series NERFINISHED ⓘ |
| primaryUser |
United Launch Alliance
ⓘ
United States of America ⓘ
surface form:
United States
|
| propellantType |
RP-1 kerosene
ⓘ
liquid oxygen (LOX) ⓘ |
| replacesInAtlas | MA-5A engine system on earlier Atlas variants ⓘ |
| specificImpulseAtSeaLevel | about 311 s ⓘ |
| specificImpulseInVacuum | about 338 s ⓘ |
| status | operational (for existing Atlas V inventory) ⓘ |
| throttleCapability | throttleable ⓘ |
| thrustAtSeaLevel | about 3.83 MN ⓘ |
| thrustInVacuum | about 4.15 MN ⓘ |
| usedFor |
U.S. government missions
ⓘ
commercial satellite launches ⓘ orbital launches ⓘ |
| usedForPayloadClass |
medium-to-heavy payloads to LEO
ⓘ
payloads to GTO ⓘ |
| usedOnLaunchVehicle |
Atlas III
ⓘ
Atlas V NERFINISHED ⓘ |
| usesTurbopump | yes ⓘ |
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-180 Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
RD-180 engine
this entity surface form:
RD-180 rocket engine