Kestrel engine (for Falcon 1 upper stage role)
E707033
The Kestrel engine is a pressure-fed, liquid-fueled rocket engine developed by SpaceX to power the upper stage of the Falcon 1 launch vehicle.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kestrel engine (for Falcon 1 upper stage role) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8055466 — 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: Kestrel engine (for Falcon 1 upper stage role) Context triple: [Merlin engine family, successorTo, Kestrel engine (for Falcon 1 upper stage role)]
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A.
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.
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B.
NK-33 engine
The NK-33 engine is a Soviet-era high-performance liquid-fuel rocket engine originally developed for the N1 lunar rocket program, known for its efficiency and thrust-to-weight ratio.
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C.
F-1 engine
The F-1 engine is a powerful liquid-fueled rocket engine developed by Rocketdyne and famously used on NASA’s Saturn V launch vehicle to provide the immense thrust needed for Apollo Moon missions.
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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.
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E.
Centaur upper stage
The Centaur upper stage is a high-energy rocket stage developed by the United States that pioneered the use of liquid hydrogen and liquid oxygen propellants to boost payloads from low Earth orbit to higher orbits and interplanetary trajectories.
- 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: Kestrel engine (for Falcon 1 upper stage role) Target entity description: The Kestrel engine is a pressure-fed, liquid-fueled rocket engine developed by SpaceX to power the upper stage of the Falcon 1 launch vehicle.
-
A.
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.
-
B.
NK-33 engine
The NK-33 engine is a Soviet-era high-performance liquid-fuel rocket engine originally developed for the N1 lunar rocket program, known for its efficiency and thrust-to-weight ratio.
-
C.
F-1 engine
The F-1 engine is a powerful liquid-fueled rocket engine developed by Rocketdyne and famously used on NASA’s Saturn V launch vehicle to provide the immense thrust needed for Apollo Moon missions.
-
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.
Centaur upper stage
The Centaur upper stage is a high-energy rocket stage developed by the United States that pioneered the use of liquid hydrogen and liquid oxygen propellants to boost payloads from low Earth orbit to higher orbits and interplanetary trajectories.
- F. None of above. chosen
Statements (47)
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: Kestrel engine (for Falcon 1 upper stage role) Description of subject: The Kestrel engine is a pressure-fed, liquid-fueled rocket engine developed by SpaceX to power the upper stage of the Falcon 1 launch vehicle.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.