Grumman X-29
E20574
The Grumman X-29 was an experimental U.S. research aircraft notable for its forward-swept wings, advanced composite materials, and fly-by-wire control system used to explore extreme aerodynamic concepts.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Grumman X-29 canonical | 2 |
| X-29 program | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T145991 — 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: Grumman X-29 Context triple: [X-Plane experimental aircraft programs, notableAircraft, Grumman X-29]
-
A.
Douglas X-3 Stiletto
The Douglas X-3 Stiletto was a slender, jet-powered experimental research aircraft of the early 1950s designed to investigate sustained supersonic flight and advanced aerodynamic concepts for future high-speed aircraft.
-
B.
Northrop X-21
The Northrop X-21 was an experimental U.S. jet aircraft of the 1960s designed to test laminar-flow control technology for improved aerodynamic efficiency.
-
C.
Bell X-5
The Bell X-5 was an early U.S. experimental jet that pioneered variable-sweep wing technology, helping to shape the design of later high-performance military aircraft.
-
D.
Northrop X-4 Bantam
The Northrop X-4 Bantam was a late-1940s American experimental jet aircraft designed to test the stability and handling of a tailless, swept-wing configuration at transonic speeds.
-
E.
Bell X-2
The Bell X-2 was a rocket-powered experimental research aircraft developed in the 1950s to investigate flight characteristics at extremely high speeds and altitudes, contributing crucial data to early supersonic and space-era aeronautics.
- 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: Grumman X-29 Target entity description: The Grumman X-29 was an experimental U.S. research aircraft notable for its forward-swept wings, advanced composite materials, and fly-by-wire control system used to explore extreme aerodynamic concepts.
-
A.
Douglas X-3 Stiletto
The Douglas X-3 Stiletto was a slender, jet-powered experimental research aircraft of the early 1950s designed to investigate sustained supersonic flight and advanced aerodynamic concepts for future high-speed aircraft.
-
B.
Northrop X-21
The Northrop X-21 was an experimental U.S. jet aircraft of the 1960s designed to test laminar-flow control technology for improved aerodynamic efficiency.
-
C.
Bell X-5
The Bell X-5 was an early U.S. experimental jet that pioneered variable-sweep wing technology, helping to shape the design of later high-performance military aircraft.
-
D.
Northrop X-4 Bantam
The Northrop X-4 Bantam was a late-1940s American experimental jet aircraft designed to test the stability and handling of a tailless, swept-wing configuration at transonic speeds.
-
E.
Bell X-2
The Bell X-2 was a rocket-powered experimental research aircraft developed in the 1950s to investigate flight characteristics at extremely high speeds and altitudes, contributing crucial data to early supersonic and space-era aeronautics.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
X-plane
ⓘ
experimental aircraft ⓘ research aircraft ⓘ |
| airframeMaterial | advanced composite materials ⓘ |
| basedOn | Northrop F-5 airframe components ⓘ |
| controlSystem |
digital flight control system
ⓘ
fly-by-wire ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | 1 ⓘ |
| crewType | pilot ⓘ |
| designFeature |
canard foreplanes
ⓘ
composite wing structure ⓘ forward-swept wings ⓘ relaxed static stability ⓘ thrust-to-weight optimization for maneuverability ⓘ |
| emptyWeight | approximately 13,600 lb ⓘ |
| engineModel | General Electric F404 ⓘ |
| engineType | turbofan ⓘ |
| firstFlight | 1984-12-14 ⓘ |
| grossWeight | approximately 17,600 lb ⓘ |
| height | approximately 15 ft ⓘ |
| introduction | 1984 ⓘ |
| length | approximately 53 ft ⓘ |
| manufacturer | Grumman ⓘ |
| maximumSpeed | approximately Mach 1.8 ⓘ |
| noseGearOrigin |
F-16 Fighting Falcon
ⓘ
surface form:
General Dynamics F-16 Fighting Falcon
|
| notableFor |
forward-swept wings
ⓘ
research into extreme aerodynamic concepts ⓘ triply redundant fly-by-wire control system ⓘ use of advanced composite materials ⓘ |
| numberBuilt | 2 ⓘ |
| operator |
NASA
ⓘ
United States Air Force ⓘ |
| powerplant | 1 × General Electric F404 turbofan ⓘ |
| primaryUser | NASA ⓘ |
| program |
Grumman X-29
self-linksurface differs
ⓘ
surface form:
X-29 program
|
| programSponsor |
Defense Advanced Research Projects Agency
ⓘ
United States Air Force ⓘ |
| purpose |
aerodynamic research
ⓘ
exploration of forward-swept wing technology ⓘ flight control research ⓘ |
| retired | 1992 ⓘ |
| serviceCeiling | approximately 50,000 ft ⓘ |
| status | retired ⓘ |
| tailConfiguration | canard ⓘ |
| testAgency |
NASA Armstrong Flight Research Center
ⓘ
surface form:
NASA Dryden Flight Research Center
|
| testLocation | Edwards Air Force Base ⓘ |
| wingConfiguration | forward-swept wing ⓘ |
| wingspan | approximately 27 ft ⓘ |
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: Grumman X-29 Description of subject: The Grumman X-29 was an experimental U.S. research aircraft notable for its forward-swept wings, advanced composite materials, and fly-by-wire control system used to explore extreme aerodynamic concepts.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
X-29 program