Bell X-1A
E466445
The Bell X-1A was an experimental rocket-powered research aircraft developed in the early 1950s to investigate high-speed, high-altitude flight beyond the capabilities of the original Bell X-1.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Bell X-1A canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T4637338 — 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-1A Context triple: [Bell X-1B, successorTo, Bell X-1A]
-
A.
Bell X-1B
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.
-
B.
Bell X-1E
The Bell X-1E was a late, highly modified variant of the pioneering X-1 rocket research aircraft, used by the U.S. to investigate high-speed transonic and supersonic flight aerodynamics in the 1950s.
-
C.
Bell X-1C
The Bell X-1C was a planned but never completed advanced variant of the Bell X-1 rocket-powered research aircraft, intended for high-speed military weapons testing.
-
D.
Bell X-1D
The Bell X-1D was an experimental rocket-powered research aircraft in the X-1 series, built to extend high-speed flight testing beyond the capabilities of the original Bell X-1.
-
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: Bell X-1A Target entity description: The Bell X-1A was an experimental rocket-powered research aircraft developed in the early 1950s to investigate high-speed, high-altitude flight beyond the capabilities of the original Bell X-1.
-
A.
Bell X-1B
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.
-
B.
Bell X-1E
The Bell X-1E was a late, highly modified variant of the pioneering X-1 rocket research aircraft, used by the U.S. to investigate high-speed transonic and supersonic flight aerodynamics in the 1950s.
-
C.
Bell X-1C
The Bell X-1C was a planned but never completed advanced variant of the Bell X-1 rocket-powered research aircraft, intended for high-speed military weapons testing.
-
D.
Bell X-1D
The Bell X-1D was an experimental rocket-powered research aircraft in the X-1 series, built to extend high-speed flight testing beyond the capabilities of the original Bell X-1.
-
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 (46)
| Predicate | Object |
|---|---|
| instanceOf |
X-plane
ⓘ
experimental rocket-powered research aircraft ⓘ |
| achievedMachNumber | Mach 2.44 on 1953-12-12 ⓘ |
| aircraftConfiguration | single-seat rocket research aircraft ⓘ |
| aircraftRole | research aircraft ⓘ |
| airframeMaterial | metal ⓘ |
| brokeSpeedRecord | 1953-12-12 ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| crew | 1 ⓘ |
| designedBy | Bell Aircraft engineering team ⓘ |
| designedToInvestigate |
aerodynamic heating at high Mach numbers
ⓘ
high-altitude stability and control ⓘ supersonic flight ⓘ transonic flight ⓘ |
| developedFor |
high-altitude flight research
ⓘ
high-speed flight research ⓘ |
| engine |
Reaction Motors XLR11 rocket engine
ⓘ
linked to:
Reaction Motors XLR11
|
| fate | lost in landing accident ⓘ |
| firstFlightDate | 1953-02-21 ⓘ |
| firstFlightYear | 1953 ⓘ |
| flightRegime | high supersonic ⓘ |
| landingAccidentYear | 1954 ⓘ |
| launchMethod |
air-launched from Boeing B-29
ⓘ
air-launched from Boeing B-50 ⓘ |
| manufacturer |
Bell Aircraft Corporation
ⓘ
linked to:
Bell Aircraft
|
| maxAltitudeFeet | approximately 90,000 ⓘ |
| maxSpeed | approximately 1,650 mph ⓘ |
| maxSpeedMach | 2.44 ⓘ |
| notablePilot |
Arthur Murray
ⓘ
Chuck Yeager ⓘ |
| numberBuilt | 1 ⓘ |
| numberOfEngines | 1 ⓘ |
| operator | United States Air Force ⓘ |
| predecessor | Bell X-1 ⓘ |
| program | US X-plane program ⓘ |
| propulsionType | rocket-powered ⓘ |
| researchContribution |
data on aerodynamic heating for future high-speed aircraft
ⓘ
data on high-Mach longitudinal stability ⓘ |
| researchFocus |
dynamic stability at high Mach numbers
ⓘ
pilot handling qualities at high altitude ⓘ |
| status | retired ⓘ |
| successorInProgram |
Bell X-1B
ⓘ
Bell X-2 ⓘ |
| tailConfiguration | conventional tail ⓘ |
| usedBy |
NACA (through data sharing)
ⓘ
linked to:
NACA
|
| wingConfiguration | low-wing monoplane ⓘ |
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-1A Description of subject: The Bell X-1A was an experimental rocket-powered research aircraft developed in the early 1950s to investigate high-speed, high-altitude flight beyond the capabilities of the original Bell X-1.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.