Lockheed Martin X-33
E512390
experimental spaceplane
lifting-body vehicle
subscale prototype
technology demonstrator
unmanned spacecraft
The Lockheed Martin X-33 was an experimental, unmanned, subscale technology demonstrator intended to validate key technologies for a reusable single-stage-to-orbit spaceplane.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lockheed Martin X-33 canonical | 3 |
| X-33 VentureStar technology demonstrator | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5333602 — 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: Lockheed Martin X-33 Context triple: [NASA X-plane series, includes, Lockheed Martin X-33]
-
A.
Boeing X-32
The Boeing X-32 was a stealthy, delta-winged prototype fighter developed for the U.S. Joint Strike Fighter competition, ultimately losing to the Lockheed Martin X-35 (now the F-35).
-
B.
Boeing X-48
The Boeing X-48 is an experimental blended wing body research aircraft developed to test advanced aerodynamic and efficiency concepts for future military and commercial planes.
-
C.
Boeing X-45
The Boeing X-45 is an experimental unmanned combat air vehicle (UCAV) developed for the U.S. military to demonstrate autonomous strike and reconnaissance capabilities.
-
D.
Lockheed Martin X-56
The Lockheed Martin X-56 is an experimental unmanned research aircraft designed to test flexible, lightweight wings and active flutter suppression technologies for future high-efficiency aircraft.
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E.
X-51A Waverider scramjet demonstrator
The X-51A Waverider scramjet demonstrator is an experimental unmanned hypersonic aircraft designed to test air-breathing supersonic combustion ramjet propulsion at extremely high speeds.
- 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: Lockheed Martin X-33 Target entity description: The Lockheed Martin X-33 was an experimental, unmanned, subscale technology demonstrator intended to validate key technologies for a reusable single-stage-to-orbit spaceplane.
-
A.
Boeing X-32
The Boeing X-32 was a stealthy, delta-winged prototype fighter developed for the U.S. Joint Strike Fighter competition, ultimately losing to the Lockheed Martin X-35 (now the F-35).
-
B.
Boeing X-48
The Boeing X-48 is an experimental blended wing body research aircraft developed to test advanced aerodynamic and efficiency concepts for future military and commercial planes.
-
C.
Boeing X-45
The Boeing X-45 is an experimental unmanned combat air vehicle (UCAV) developed for the U.S. military to demonstrate autonomous strike and reconnaissance capabilities.
-
D.
Lockheed Martin X-56
The Lockheed Martin X-56 is an experimental unmanned research aircraft designed to test flexible, lightweight wings and active flutter suppression technologies for future high-efficiency aircraft.
-
E.
X-51A Waverider scramjet demonstrator
The X-51A Waverider scramjet demonstrator is an experimental unmanned hypersonic aircraft designed to test air-breathing supersonic combustion ramjet propulsion at extremely high speeds.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
experimental spaceplane
ⓘ
lifting-body vehicle ⓘ subscale prototype ⓘ technology demonstrator ⓘ unmanned spacecraft ⓘ |
| cancellationReason |
cost overruns
ⓘ
technical problems with composite cryogenic tanks ⓘ |
| cancellationYear | 2001 ⓘ |
| controlSurfaces | aerodynamic flaps and body flaps ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | unmanned ⓘ |
| designFeature |
autonomous flight control system
ⓘ
composite liquid hydrogen tanks ⓘ integrated composite structures ⓘ lifting-body shape ⓘ metallic thermal protection system ⓘ |
| engineType | aerospike rocket engine ⓘ |
| flightProfile | suborbital ⓘ |
| fuelType | liquid hydrogen ⓘ |
| fundingAgency | NASA NERFINISHED ⓘ |
| intendedEngineModel | Rocketdyne XRS-2200 linear aerospike NERFINISHED ⓘ |
| intendedFirstFlightYear | 1999 ⓘ |
| intendedLaunchMode | single-stage-to-orbit concept validation ⓘ |
| intendedOrbitType | low Earth orbit (for full-scale VentureStar) ⓘ |
| intendedReusability | fully reusable launch vehicle demonstrator ⓘ |
| landingConfiguration | horizontal landing ⓘ |
| launchConfiguration | vertical takeoff ⓘ |
| manufacturer | Lockheed Martin NERFINISHED ⓘ |
| materialUsed | graphite-epoxy composite ⓘ |
| neverFlew | true ⓘ |
| numberOfFlightsPlanned | 15 ⓘ |
| operator | NASA ⓘ |
| oxidizerType | liquid oxygen ⓘ |
| partOf | VentureStar program NERFINISHED ⓘ |
| plannedLandingSite | Michael Army Airfield, Utah NERFINISHED ⓘ |
| plannedLaunchSite | Edwards Air Force Base NERFINISHED ⓘ |
| programGoal | demonstrate rapid turnaround operations for reusable launch vehicles ⓘ |
| programName | X-33 Reusable Launch Vehicle Technology Demonstrator NERFINISHED ⓘ |
| programStartYear | 1996 ⓘ |
| programType | NASA X-plane program NERFINISHED ⓘ |
| propulsionType | rocket ⓘ |
| purpose |
demonstration of single-stage-to-orbit concepts
ⓘ
reduction of cost to low Earth orbit ⓘ validation of reusable launch vehicle technologies ⓘ |
| relatedVehicle | Lockheed Martin VentureStar NERFINISHED ⓘ |
| scaleRelativeToVentureStar | subscale ⓘ |
| status | cancelled ⓘ |
| testSitePlanned | Edwards Air Force Base NERFINISHED ⓘ |
| thermalProtectionSystemType | metallic shingles ⓘ |
| wingConfiguration | tailless lifting body ⓘ |
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: Lockheed Martin X-33 Description of subject: The Lockheed Martin X-33 was an experimental, unmanned, subscale technology demonstrator intended to validate key technologies for a reusable single-stage-to-orbit spaceplane.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
X-33 VentureStar technology demonstrator