48-1385
E458946
48-1385 is the U.S. Air Force serial number assigned to the Bell X-1B, an experimental rocket-powered research aircraft used to investigate high-speed flight and aerodynamic heating in the early Cold War era.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 48-1385 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4637322 — 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: 48-1385 Context triple: [Bell X-1B, serialNumber, 48-1385]
-
A.
93-438
93-438 is the public law number for the Energy Reorganization Act of 1974, a U.S. federal statute that restructured federal oversight of nuclear energy and created the Nuclear Regulatory Commission.
-
B.
79-585
79-585 is the numerical designation of a specific Act of the 79th United States Congress, formally identified as Public Law 79-585.
-
C.
44-86292
44-86292 is the U.S. Army Air Forces Boeing B-29 Superfortress bomber better known as the Enola Gay, which dropped the first atomic bomb used in warfare on Hiroshima in 1945.
-
D.
96-480
96-480 is the public law number for the Stevenson-Wydler Technology Innovation Act of 1980, a U.S. federal law that promotes the transfer of technology from federal laboratories to the private sector.
-
E.
84-851
84-851 is a United States federal statute enacted by the 84th Congress, identified by its public law number in the body of U.S. public laws.
- 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: 48-1385 Target entity description: 48-1385 is the U.S. Air Force serial number assigned to the Bell X-1B, an experimental rocket-powered research aircraft used to investigate high-speed flight and aerodynamic heating in the early Cold War era.
-
A.
93-438
93-438 is the public law number for the Energy Reorganization Act of 1974, a U.S. federal statute that restructured federal oversight of nuclear energy and created the Nuclear Regulatory Commission.
-
B.
79-585
79-585 is the numerical designation of a specific Act of the 79th United States Congress, formally identified as Public Law 79-585.
-
C.
44-86292
44-86292 is the U.S. Army Air Forces Boeing B-29 Superfortress bomber better known as the Enola Gay, which dropped the first atomic bomb used in warfare on Hiroshima in 1945.
-
D.
96-480
96-480 is the public law number for the Stevenson-Wydler Technology Innovation Act of 1980, a U.S. federal law that promotes the transfer of technology from federal laboratories to the private sector.
-
E.
84-851
84-851 is a United States federal statute enacted by the 84th Congress, identified by its public law number in the body of U.S. public laws.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Bell X-1B
ⓘ
X-1 series aircraft ⓘ experimental rocket-powered research aircraft ⓘ |
| achievedMachNumber | approximately Mach 2.3 ⓘ |
| airframeMaterial | primarily aluminum alloy with localized thermal protection ⓘ |
| basedAt | Edwards Air Force Base NERFINISHED ⓘ |
| contributedTo | design knowledge for later supersonic and hypersonic aircraft ⓘ |
| enteredService | mid-1950s ⓘ |
| firstFlightDate | 1954-09-27 ⓘ |
| firstFlightLocation | Edwards Air Force Base NERFINISHED ⓘ |
| hasConfiguration |
conventional tail
ⓘ
mid-wing monoplane ⓘ single-seat research aircraft ⓘ |
| hasCountryOfOrigin | United States of America NERFINISHED ⓘ |
| hasCrewCapacity | 1 ⓘ |
| hasEngineType | liquid-fueled rocket engine ⓘ |
| hasEra | early Cold War ⓘ |
| hasFeature |
additional temperature and structural instrumentation
ⓘ
enlarged vertical tail compared to original X-1 ⓘ reaction control system for attitude control at high altitude (test installation) ⓘ thicker thermal-protection skin than earlier X-1 variants ⓘ |
| hasLandingGear | conventional retractable landing gear ⓘ |
| hasManufacturer | Bell Aircraft Corporation NERFINISHED ⓘ |
| hasMilitaryDesignation | X-1B NERFINISHED ⓘ |
| hasNoseShape | bullet-shaped nose similar to original X-1 ⓘ |
| hasNumberOfEngines | 1 ⓘ |
| hasOperator | United States Air Force NERFINISHED ⓘ |
| hasPrimaryUser | NACA NERFINISHED ⓘ |
| hasPropulsionType | rocket propulsion ⓘ |
| hasRole |
research aircraft
ⓘ
technology demonstrator ⓘ |
| hasSecondaryUser | US Air Force NERFINISHED ⓘ |
| hasSerialNumber | 48-1385 ⓘ |
| hasWingType | straight wing ⓘ |
| launchMethod |
air-launched from Boeing B-29 mothership
ⓘ
air-launched from Boeing B-50 mothership ⓘ |
| operatedBy |
National Advisory Committee for Aeronautics
NERFINISHED
ⓘ
US Air Force Flight Test Center NERFINISHED ⓘ |
| partOfProgram |
Bell X-1 program
NERFINISHED
ⓘ
US high-speed research program ⓘ |
| poweredBy | Reaction Motors XLR11 rocket engine NERFINISHED ⓘ |
| retired | late 1950s ⓘ |
| usedFor |
aerodynamic heating research
ⓘ
high-speed flight research ⓘ stability and control research at high Mach numbers ⓘ swept-wing and thin airfoil research (via data correlation) ⓘ |
| usedInResearchOn |
aerodynamic behavior near Mach 2
ⓘ
control effectiveness at transonic and supersonic speeds ⓘ high-temperature materials for airframes ⓘ thermal stresses on aircraft structures ⓘ |
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: 48-1385 Description of subject: 48-1385 is the U.S. Air Force serial number assigned to the Bell X-1B, an experimental rocket-powered research aircraft used to investigate high-speed flight and aerodynamic heating in the early Cold War era.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.