Bell X-1B
E101563
The Bell X-1B was an advanced variant of the original Bell X-1 rocket-powered research aircraft, used primarily to investigate high-speed aerodynamic heating and stability at transonic and supersonic speeds.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T804669 — 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: Bell X-1B Context triple: [Bell X-1, successor, Bell X-1B]
-
A.
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.
-
B.
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.
-
C.
Bell X-1
The Bell X-1 was a pioneering rocket-powered research aircraft that became the first airplane to break the sound barrier in level flight.
-
D.
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.
-
E.
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.
- 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: Bell X-1B Target entity description: The Bell X-1B was an advanced variant of the original Bell X-1 rocket-powered research aircraft, used primarily to investigate high-speed aerodynamic heating and stability at transonic and supersonic speeds.
-
A.
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.
-
B.
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.
-
C.
Bell X-1
The Bell X-1 was a pioneering rocket-powered research aircraft that became the first airplane to break the sound barrier in level flight.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
experimental aircraft
ⓘ
research aircraft ⓘ rocket-powered aircraft ⓘ |
| aircraftCategory |
X-plane
ⓘ
linked to:
Lockheed Martin X-series
|
| aircraftType | single-seat ⓘ |
| airframeMaterial | metal ⓘ |
| basedOn |
Bell X-1A
ⓘ
linked to:
Bell X-1D
|
| carrierAircraft |
B-29 Superfortress
ⓘ
B-50 Superfortress ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| crew | 1 ⓘ |
| designedFor |
high Mach number research
ⓘ
stability at supersonic speeds ⓘ thermal effects investigation ⓘ |
| engineModel | Reaction Motors XLR11 ⓘ |
| firstFlightDate | 1954-09-27 ⓘ |
| hasConfiguration | mid-wing monoplane ⓘ |
| hasNoseDesign | pointed nose for supersonic flight ⓘ |
| launchMethod | air-launched from carrier aircraft ⓘ |
| manufacturer | Bell Aircraft ⓘ |
| maximumSpeedClass | supersonic ⓘ |
| notableFeature |
additional instrumentation for heating studies
ⓘ
improved control system for high-speed flight ⓘ |
| numberBuilt | 1 ⓘ |
| operator |
National Advisory Committee for Aeronautics
ⓘ
linked to:
NACA
United States Air Force ⓘ |
| partOf |
Bell X-1 program
ⓘ
linked to:
Bell X-1
|
| powerplantType | liquid-fueled rocket ⓘ |
| program | USAF/NACA X-plane program ⓘ |
| programObjective | extend knowledge of flight beyond Mach 2 ⓘ |
| programRole | advanced variant of Bell X-1 ⓘ |
| propulsion | rocket engine ⓘ |
| registration | USAF 48-1385 ⓘ |
| researchFocus |
aerodynamic heating at high Mach numbers
ⓘ
stability and control in supersonic regime ⓘ |
| retired | 1958 ⓘ |
| serialNumber | 48-1385 ⓘ |
| status | retired ⓘ |
| successorTo |
Bell X-1
ⓘ
Bell X-1A ⓘ |
| testLocation | Edwards Air Force Base ⓘ |
| usedBy | test pilots ⓘ |
| usedFor |
aerodynamic heating studies
ⓘ
high-speed aerodynamic research ⓘ stability and control research ⓘ supersonic flight testing ⓘ transonic flight testing ⓘ |
| wingConfiguration | straight wing ⓘ |
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: Bell X-1B Description of subject: The Bell X-1B was an advanced variant of the original Bell X-1 rocket-powered research aircraft, used primarily to investigate high-speed aerodynamic heating and stability at transonic and supersonic speeds.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Bell X-1B
linked to: Bell X-1B