Merlin 1D
E36032
Merlin 1D is a liquid-fueled rocket engine developed by SpaceX, known for powering the first stage of the Falcon 9 launch vehicle with high thrust and reusability.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Merlin 1D canonical | 7 |
| Merlin 1D Vacuum | 2 |
| Merlin Vacuum | 2 |
| 27 Merlin 1D | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T276701 — 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: Merlin 1D Context triple: [Falcon 9, engineTypeFirstStage, Merlin 1D]
-
A.
Merlin 1C
Merlin 1C is a liquid-fueled rocket engine developed by SpaceX for use on early Falcon rockets, notable for its role in pioneering the company’s orbital launch capabilities.
-
B.
Merlin 1A
Merlin 1A is the first-generation liquid-fueled rocket engine developed by SpaceX for early Falcon 1 launches.
-
C.
The Beguiling of Merlin
The Beguiling of Merlin is a famous 1874 painting by Pre-Raphaelite artist Edward Burne-Jones depicting the Arthurian sorceress Nimue enchanting and imprisoning the wizard Merlin.
-
D.
Magi
The Magi are the wise men or kings from the East in the New Testament who visit the infant Jesus, traditionally bearing gifts of gold, frankincense, and myrrh.
-
E.
Alquízar
Alquízar is a Cuban town and municipality located in the western part of the island within the province of La Habana.
- 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: Merlin 1D Target entity description: Merlin 1D is a liquid-fueled rocket engine developed by SpaceX, known for powering the first stage of the Falcon 9 launch vehicle with high thrust and reusability.
-
A.
Merlin 1C
Merlin 1C is a liquid-fueled rocket engine developed by SpaceX for use on early Falcon rockets, notable for its role in pioneering the company’s orbital launch capabilities.
-
B.
Merlin 1A
Merlin 1A is the first-generation liquid-fueled rocket engine developed by SpaceX for early Falcon 1 launches.
-
C.
The Beguiling of Merlin
The Beguiling of Merlin is a famous 1874 painting by Pre-Raphaelite artist Edward Burne-Jones depicting the Arthurian sorceress Nimue enchanting and imprisoning the wizard Merlin.
-
D.
Magi
The Magi are the wise men or kings from the East in the New Testament who visit the infant Jesus, traditionally bearing gifts of gold, frankincense, and myrrh.
-
E.
Alquízar
Alquízar is a Cuban town and municipality located in the western part of the island within the province of La Habana.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
liquid-fueled rocket engine
ⓘ
rocket engine ⓘ |
| application |
commercial space launch
ⓘ
government space missions ⓘ |
| chamberPressure_bar | approximately 97 ⓘ |
| configuration | nine engines per Falcon 9 first stage ⓘ |
| coolingMethod | regenerative cooling ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| cycleType | gas-generator cycle ⓘ |
| designGoal |
high reliability
ⓘ
high thrust-to-weight ratio ⓘ low cost ⓘ reusability ⓘ |
| developer | SpaceX propulsion team ⓘ |
| era | 21st century rocket engine ⓘ |
| family | Merlin engine family ⓘ |
| firstFlightVehicle |
Falcon 9 v1.1
ⓘ
linked to:
Falcon 9 rocket
|
| fuel | RP-1 kerosene ⓘ |
| gimbalRange | gimbaled for thrust vector control ⓘ |
| ignitionSystem | TEA-TEB pyrophoric ignition ⓘ |
| industry | aerospace ⓘ |
| manufacturer | SpaceX ⓘ |
| mounting | octaweb engine arrangement on Falcon 9 ⓘ |
| notableFeature | enables propulsive landing of Falcon 9 first stages ⓘ |
| nozzleMaterial | niobium alloy for vacuum variant ⓘ |
| oxidizer | liquid oxygen ⓘ |
| predecessor | Merlin 1C ⓘ |
| propellantCombination | LOX/RP-1 ⓘ |
| propellantType | liquid ⓘ |
| reusability |
designed for multiple restarts
ⓘ
used on reusable Falcon 9 boosters ⓘ |
| specificImpulseSeaLevel_s | approximately 282 ⓘ |
| specificImpulseVacuum_s | approximately 311 ⓘ |
| status | operational ⓘ |
| throttleCapability | deep throttling ⓘ |
| thrustSeaLevel_kN | approximately 654 ⓘ |
| thrustVacuum_kN | approximately 756 ⓘ |
| thrustVectorControl | hydraulic gimbal system ⓘ |
| usedBy |
SpaceX launch services
ⓘ
linked to:
SpaceX
|
| usedFor |
orbital launch vehicles
ⓘ
payload delivery to geostationary transfer orbit ⓘ payload delivery to low Earth orbit ⓘ |
| usedIn |
Falcon 9 Block 5
ⓘ
linked to:
Falcon 9 rocket
Falcon 9 Full Thrust ⓘ
linked to:
Falcon 9 rocket
Falcon 9 first stage ⓘ
linked to:
Falcon 9 rocket
Falcon 9 v1.1 ⓘ
linked to:
Falcon 9 rocket
Falcon Heavy center core ⓘ
linked to:
Falcon Heavy rocket
Falcon Heavy side boosters ⓘ
linked to:
Falcon Heavy rocket
|
| variant |
Merlin 1D Vacuum
ⓘ
linked to:
Merlin 1D
Merlin 1D sea-level ⓘ |
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: Merlin 1D Description of subject: Merlin 1D is a liquid-fueled rocket engine developed by SpaceX, known for powering the first stage of the Falcon 9 launch vehicle with high thrust and reusability.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Falcon 9 rocket
subject linked to:
Falcon 9 rocket
linked to: Merlin 1D
subject linked to:
Falcon Heavy rocket
linked to: Merlin 1D
linked to: Merlin 1D
linked to: Merlin 1D