LE-9
E418620
The LE-9 is a next-generation liquid hydrogen–liquid oxygen rocket engine developed by Japan’s JAXA and Mitsubishi Heavy Industries for the core stage of the H3 launch vehicle, emphasizing high efficiency and cost-effective, reliable operation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| LE-9 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4148579 — 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: LE-9 Context triple: [H3 launch vehicle, firstStageEngine, LE-9]
-
A.
LE-7A
The LE-7A is a Japanese liquid-fueled rocket engine used to power the core stage of the H-IIA family of launch vehicles.
-
B.
LE-5B
The LE-5B is a Japanese liquid-fueled cryogenic rocket engine developed by JAXA and Mitsubishi Heavy Industries for use on the upper stages of modern H-II series launch vehicles.
-
C.
LEU
LEU is the National Rail station code for Leuchars (for St Andrews) railway station in Fife, Scotland.
-
D.
L83
L83 is a 5.3-liter GM EcoTec3 V8 truck engine used in late-model Chevrolet and GMC pickups and SUVs.
-
E.
LC-19
LC-19 is a historic launch complex at Cape Canaveral used extensively during NASA’s early crewed spaceflight programs, including the Gemini missions.
- 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: LE-9 Target entity description: The LE-9 is a next-generation liquid hydrogen–liquid oxygen rocket engine developed by Japan’s JAXA and Mitsubishi Heavy Industries for the core stage of the H3 launch vehicle, emphasizing high efficiency and cost-effective, reliable operation.
-
A.
LE-7A
The LE-7A is a Japanese liquid-fueled rocket engine used to power the core stage of the H-IIA family of launch vehicles.
-
B.
LE-5B
The LE-5B is a Japanese liquid-fueled cryogenic rocket engine developed by JAXA and Mitsubishi Heavy Industries for use on the upper stages of modern H-II series launch vehicles.
-
C.
LEU
LEU is the National Rail station code for Leuchars (for St Andrews) railway station in Fife, Scotland.
-
D.
L83
L83 is a 5.3-liter GM EcoTec3 V8 truck engine used in late-model Chevrolet and GMC pickups and SUVs.
-
E.
LC-19
LC-19 is a historic launch complex at Cape Canaveral used extensively during NASA’s early crewed spaceflight programs, including the Gemini missions.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
liquid-propellant rocket engine
ⓘ
rocket engine ⓘ |
| agency | JAXA NERFINISHED ⓘ |
| application |
Japanese commercial launches
ⓘ
Japanese governmental missions ⓘ |
| chamberPressure_bar | about 100 ⓘ |
| countryOfOrigin | Japan ⓘ |
| cycleSubtype | expander bleed–like simplified staged combustion ⓘ |
| cycleType | staged combustion cycle ⓘ |
| designFeature |
gimbal capability for thrust vector control
ⓘ
hydrogen-rich staged combustion ⓘ integrated engine and nozzle structure ⓘ simplified turbomachinery ⓘ single-shaft turbopump configuration ⓘ |
| designGoal |
cost reduction
ⓘ
ease of manufacturing ⓘ high efficiency ⓘ high reliability ⓘ |
| developer |
Japan Aerospace Exploration Agency
ⓘ
surface form:
JAXA
Japan Aerospace Exploration Agency ⓘ |
| firstHotFireTests | 2010s ⓘ |
| industrialPartner | Mitsubishi Heavy Industries ⓘ |
| intendedStage | core stage ⓘ |
| intendedVehicle | H3 launch vehicle ⓘ |
| manufacturer | Mitsubishi Heavy Industries ⓘ |
| mixtureRatio_OxToFuel | about 6 ⓘ |
| nozzleExpansionRatio | about 60 ⓘ |
| numberOfEnginesOnCoreStage | 2 or 3 depending on configuration ⓘ |
| oxidizer | liquid oxygen ⓘ |
| predecessor | LE-7A ⓘ |
| program |
H3 launch vehicle
ⓘ
surface form:
H3 Launch Vehicle Program
|
| propellant | liquid hydrogen ⓘ |
| propellantFeedSystem | turbopump-fed ⓘ |
| propellantType | cryogenic ⓘ |
| specificImpulseSeaLevel_s | about 360 ⓘ |
| specificImpulseVacuum_s | about 425 ⓘ |
| status |
in development
ⓘ
test phase ⓘ |
| thrustSeaLevel_kN | about 1100 ⓘ |
| thrustVacuum_kN | about 1500 ⓘ |
| usedOn |
H3-22 configuration
ⓘ
H3-24 configuration ⓘ |
| uses |
interplanetary mission support via H3
ⓘ
orbital launch ⓘ satellite launch ⓘ |
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: LE-9 Description of subject: The LE-9 is a next-generation liquid hydrogen–liquid oxygen rocket engine developed by Japan’s JAXA and Mitsubishi Heavy Industries for the core stage of the H3 launch vehicle, emphasizing high efficiency and cost-effective, reliable operation.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.