YF-23 Black Widow II
E205810
The YF-23 Black Widow II was an experimental stealth fighter prototype developed by Northrop/McDonnell Douglas for the U.S. Air Force’s Advanced Tactical Fighter program, competing against what became the F-22 Raptor.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Northrop YF-23 | 2 |
| YF-23 | 2 |
| YF-23 (prototype evaluation, derivative engines) | 1 |
| YF-23 Black Widow II canonical | 1 |
| YF-23 PAV-1 | 1 |
| YF-23 PAV-2 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1844175 — 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: YF-23 Black Widow II Context triple: [F-22 Raptor, basedOnCompetitionWith, YF-23 Black Widow II]
-
A.
Northrop YF-17
The Northrop YF-17 was a lightweight prototype fighter aircraft developed in the 1970s that served as the design basis for the later F/A-18 Hornet.
-
B.
Rockwell-MBB X-31
The Rockwell-MBB X-31 was an experimental jet fighter demonstrator designed to test advanced thrust vectoring and high-angle-of-attack maneuverability technologies.
-
C.
F-22 Raptor
The F-22 Raptor is a U.S. fifth-generation stealth air superiority fighter jet known for its advanced avionics, supercruise capability, and exceptional maneuverability.
-
D.
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).
-
E.
Grumman X-29
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.
- 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: YF-23 Black Widow II Target entity description: The YF-23 Black Widow II was an experimental stealth fighter prototype developed by Northrop/McDonnell Douglas for the U.S. Air Force’s Advanced Tactical Fighter program, competing against what became the F-22 Raptor.
-
A.
Northrop YF-17
The Northrop YF-17 was a lightweight prototype fighter aircraft developed in the 1970s that served as the design basis for the later F/A-18 Hornet.
-
B.
Rockwell-MBB X-31
The Rockwell-MBB X-31 was an experimental jet fighter demonstrator designed to test advanced thrust vectoring and high-angle-of-attack maneuverability technologies.
-
C.
F-22 Raptor
The F-22 Raptor is a U.S. fifth-generation stealth air superiority fighter jet known for its advanced avionics, supercruise capability, and exceptional maneuverability.
-
D.
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).
-
E.
Grumman X-29
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
experimental aircraft
ⓘ
prototype fighter aircraft ⓘ stealth aircraft ⓘ twin‑engine jet aircraft ⓘ |
| aircraftCategory | fifth-generation fighter prototype ⓘ |
| airForceDesignation |
YF-23 Black Widow II
self-linksurface differs
ⓘ
surface form:
YF-23
|
| airframeMaterial | composite materials ⓘ |
| armamentProvision | internal air-to-air missiles ⓘ |
| competedWith |
F-22 Raptor
ⓘ
surface form:
YF-22
|
| configuration | tailless-style main wing with canted fins ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | 1 ⓘ |
| designedForCapability |
beyond-visual-range combat
ⓘ
low radar cross-section ⓘ supercruise ⓘ |
| designEmphasis | stealth over extreme agility ⓘ |
| developedFor | United States Air Force ⓘ |
| developedForProgram | Advanced Tactical Fighter program ⓘ |
| engineOption |
General Electric YF120
ⓘ
Pratt & Whitney F119 ⓘ
surface form:
Pratt & Whitney YF119
|
| engineType | turbofan ⓘ |
| era | late Cold War ⓘ |
| feature |
diamond-shaped wing planform
ⓘ
internal weapons bays ⓘ stealth shaping ⓘ twin outward-canted vertical stabilizers ⓘ |
| firstFlightDate | 1990-08-27 ⓘ |
| hasVariant |
YF-23 Black Widow II
self-linksurface differs
ⓘ
surface form:
YF-23 PAV-1
YF-23 Black Widow II self-linksurface differs ⓘ
surface form:
YF-23 PAV-2
|
| intendedMissionProfile |
deep penetration strike
ⓘ
high-altitude interception ⓘ |
| lostTo | F-22 Raptor ⓘ |
| manufacturer |
McDonnell Douglas
ⓘ
Northrop ⓘ |
| nickname | Black Widow II ⓘ |
| numberBuilt | 2 ⓘ |
| operatorDuringTesting | United States Air Force ⓘ |
| powerplantCount | 2 ⓘ |
| preservedAt |
National Museum of the United States Air Force
ⓘ
Western Museum of Flight ⓘ |
| program |
Advanced Tactical Fighter program
ⓘ
surface form:
Advanced Tactical Fighter
|
| programOutcome | not selected for production ⓘ |
| role |
air superiority fighter
ⓘ
tactical fighter ⓘ |
| status | retired prototype ⓘ |
| successorInService | F-22 Raptor ⓘ |
| testPhase | flight test and evaluation ⓘ |
| usedInCompetition | Advanced Tactical Fighter flyoff ⓘ |
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: YF-23 Black Widow II Description of subject: The YF-23 Black Widow II was an experimental stealth fighter prototype developed by Northrop/McDonnell Douglas for the U.S. Air Force’s Advanced Tactical Fighter program, competing against what became the F-22 Raptor.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Northrop YF-23
this entity surface form:
YF-23
this entity surface form:
YF-23 PAV-1
this entity surface form:
YF-23 PAV-2
this entity surface form:
Northrop YF-23
this entity surface form:
YF-23
this entity surface form:
YF-23 (prototype evaluation, derivative engines)