RS-27 rocket engine
E898868
The RS-27 rocket engine is an American liquid-fueled booster engine used on Delta launch vehicles, derived from earlier Saturn I technology and known for its reliability in orbital launches.
All labels observed (3)
| Label | Occurrences |
|---|---|
| RS-27A | 2 |
| RS-27 | 1 |
| RS-27 rocket engine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10999160 — 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: RS-27 rocket engine Context triple: [Rocketdyne H-1, successor, RS-27 rocket engine]
-
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.
RD-120
The RD-120 is a Soviet-designed liquid-fueled rocket engine used on medium-lift launch vehicles, notable for its high performance and role in powering upper stages of space launch systems.
-
C.
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.
-
D.
RD-171
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.
-
E.
BE-7 engine
The BE-7 engine is Blue Origin’s high-performance liquid hydrogen–liquid oxygen rocket engine designed primarily to power lunar landers such as the company’s Blue Moon vehicle.
- 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: RS-27 rocket engine Target entity description: The RS-27 rocket engine is an American liquid-fueled booster engine used on Delta launch vehicles, derived from earlier Saturn I technology and known for its reliability in orbital launches.
-
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.
RD-120
The RD-120 is a Soviet-designed liquid-fueled rocket engine used on medium-lift launch vehicles, notable for its high performance and role in powering upper stages of space launch systems.
-
C.
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.
-
D.
RD-171
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.
-
E.
BE-7 engine
The BE-7 engine is Blue Origin’s high-performance liquid hydrogen–liquid oxygen rocket engine designed primarily to power lunar landers such as the company’s Blue Moon vehicle.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | liquid-fueled rocket engine ⓘ |
| application | expendable launch vehicles ⓘ |
| category | booster rocket engine ⓘ |
| chamberPressure | about 4.8 MPa ⓘ |
| combustionChambers | 1 ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| derivedFrom |
H-1 rocket engine
ⓘ
linked to:
H-1 engine
|
| designLineage |
Saturn I / H-1 family
ⓘ
linked to:
Saturn I
|
| engineCycle | gas-generator cycle ⓘ |
| engineType | open-cycle gas-generator ⓘ |
| era | late 20th century ⓘ |
| fuel | RP-1 ⓘ |
| gimbalCapability | gimbaled for thrust vector control ⓘ |
| heritage |
Saturn I launch vehicle program
ⓘ
linked to:
Saturn I
|
| ignitionSystem | pyrotechnic ignition ⓘ |
| launchRecord | multiple successful orbital launches ⓘ |
| manufacturer |
Rocketdyne
ⓘ
linked to:
Pratt & Whitney Rocketdyne
|
| nozzles | 1 ⓘ |
| oxidizer | liquid oxygen ⓘ |
| primaryUse | orbital launch vehicles ⓘ |
| propellantCombination | LOX/RP-1 ⓘ |
| propellantFeedSystem | turbopump-fed ⓘ |
| propellantMixture | kerosene and liquid oxygen ⓘ |
| propellantType | liquid ⓘ |
| propulsionCategory | chemical rocket engine ⓘ |
| reliability | high launch success rate ⓘ |
| role | booster engine ⓘ |
| specificImpulseSeaLevel | about 255 s ⓘ |
| specificImpulseVacuum | about 302 s ⓘ |
| status | retired ⓘ |
| successor |
RS-27A
ⓘ
linked to:
RS-27 rocket engine
|
| throttleCapability | fixed thrust ⓘ |
| thrustSeaLevel | about 890 kN ⓘ |
| thrustVacuum | about 1,054 kN ⓘ |
| usedAs | first-stage main engine ⓘ |
| usedBy |
NASA
ⓘ
U.S. Air Force ⓘ
linked to:
United States Air Force
|
| usedFor |
launching payloads to geosynchronous transfer orbit
ⓘ
launching payloads to low Earth orbit ⓘ |
| usedIn |
Delta 2000
ⓘ
Delta 3000 ⓘ Delta 4000 ⓘ Delta 5000 ⓘ
linked to:
Delta 5000 series
Delta II (early variants) ⓘ
linked to:
Delta II
|
| usedInProgram | Delta launch vehicle program ⓘ |
| usedOn | Delta first stage ⓘ |
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: RS-27 rocket engine Description of subject: The RS-27 rocket engine is an American liquid-fueled booster engine used on Delta launch vehicles, derived from earlier Saturn I technology and known for its reliability in orbital launches.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: RS-27 rocket engine
linked to: RS-27 rocket engine