Bell X-1
E17401
The Bell X-1 was a pioneering rocket-powered research aircraft that became the first airplane to break the sound barrier in level flight.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Bell X-1 canonical | 21 |
| Bell X-1 program | 4 |
| Bell X-1 Glamorous Glennis | 3 |
| Bell X-1 series | 3 |
| X-1 | 3 |
| Bell X-1A | 2 |
| X-1 jet | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T145984 — 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-1 Context triple: [X-Plane experimental aircraft programs, notableAircraft, Bell X-1]
-
A.
Messerschmitt Me 163
The Messerschmitt Me 163 was a German World War II rocket-powered interceptor aircraft, notable as the only operational rocket fighter ever deployed in combat.
-
B.
Wright J-5C Whirlwind
The Wright J-5C Whirlwind is a nine-cylinder, air-cooled radial aircraft engine renowned for its reliability and use in pioneering long-distance flights of the late 1920s.
-
C.
Messerschmitt Me 262
The Messerschmitt Me 262 was a pioneering German World War II jet fighter and fighter-bomber, notable as the world’s first operational jet-powered combat aircraft.
-
D.
Ames Research Center 40-by-80-Foot Wind Tunnel
The Ames Research Center 40-by-80-Foot Wind Tunnel is a massive NASA wind tunnel facility used to test full-scale aircraft and aerospace vehicles under controlled aerodynamic conditions.
-
E.
Ryan NYP monoplane
The Ryan NYP monoplane was the custom-built, single-engine aircraft famously flown by Charles Lindbergh on the first solo nonstop transatlantic flight in 1927.
- 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-1 Target entity description: The Bell X-1 was a pioneering rocket-powered research aircraft that became the first airplane to break the sound barrier in level flight.
-
A.
Messerschmitt Me 163
The Messerschmitt Me 163 was a German World War II rocket-powered interceptor aircraft, notable as the only operational rocket fighter ever deployed in combat.
-
B.
Wright J-5C Whirlwind
The Wright J-5C Whirlwind is a nine-cylinder, air-cooled radial aircraft engine renowned for its reliability and use in pioneering long-distance flights of the late 1920s.
-
C.
Messerschmitt Me 262
The Messerschmitt Me 262 was a pioneering German World War II jet fighter and fighter-bomber, notable as the world’s first operational jet-powered combat aircraft.
-
D.
Ames Research Center 40-by-80-Foot Wind Tunnel
The Ames Research Center 40-by-80-Foot Wind Tunnel is a massive NASA wind tunnel facility used to test full-scale aircraft and aerospace vehicles under controlled aerodynamic conditions.
-
E.
Ryan NYP monoplane
The Ryan NYP monoplane was the custom-built, single-engine aircraft famously flown by Charles Lindbergh on the first solo nonstop transatlantic flight in 1927.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
X-plane
ⓘ
experimental aircraft ⓘ research aircraft ⓘ rocket-powered aircraft ⓘ |
| aircraftType | single-seat ⓘ |
| brokeSoundBarrierAltitude | approximately 45,000 ft ⓘ |
| brokeSoundBarrierDate | 1947-10-14 ⓘ |
| brokeSoundBarrierMachNumber | 1.06 ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| crew | 1 ⓘ |
| designation |
X-1
ⓘ
linked to:
Bell X-1
|
| designInspiredBy | .50 caliber bullet ⓘ |
| engineModel | Reaction Motors XLR11 ⓘ |
| enteredService | 1946 ⓘ |
| firstFlight | 1946-01-19 ⓘ |
| fullName | Bell X-1 ⓘ |
| fuselageShape | bullet-shaped ⓘ |
| height | approximately 10 ft ⓘ |
| launchMethod |
air-launched from B-29
ⓘ
air-launched from B-50 ⓘ |
| length | approximately 31 ft ⓘ |
| location | Washington, D.C. ⓘ |
| manufacturer | Bell Aircraft ⓘ |
| maximumSpeed | about Mach 1.45 ⓘ |
| museumDisplay | Smithsonian National Air and Space Museum ⓘ |
| namedAfter |
Glennis Yeager
ⓘ
linked to:
Glennis Dickhouse Yeager
|
| nickname | Glamorous Glennis ⓘ |
| notableFor | first aircraft to exceed the speed of sound in level flight ⓘ |
| numberOfEngines | 1 ⓘ |
| operatedBy |
NACA
ⓘ
National Advisory Committee for Aeronautics ⓘ
linked to:
NACA
United States Air Force ⓘ |
| powerplantType | rocket engine ⓘ |
| primaryUser |
NACA
ⓘ
United States Air Force ⓘ |
| program | U.S. X-plane program ⓘ |
| retired | 1951 ⓘ |
| serviceCeiling | over 70,000 ft ⓘ |
| status | retired ⓘ |
| successor |
Bell X-1A
ⓘ
linked to:
Bell X-1
Bell X-1B ⓘ Bell X-1C ⓘ Bell X-1D ⓘ |
| tailConfiguration | conventional tail ⓘ |
| testPilot | Chuck Yeager ⓘ |
| usedFor |
high-speed flight research
ⓘ
supersonic flight research ⓘ transonic aerodynamics research ⓘ |
| wingConfiguration | low-wing monoplane ⓘ |
| wingspan | approximately 28 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: Bell X-1 Description of subject: The Bell X-1 was a pioneering rocket-powered research aircraft that became the first airplane to break the sound barrier in level flight.
Referenced by (37)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Bell X-1
subject linked to:
National Air and Space Museum, Washington, D.C.
linked to: Bell X-1
subject linked to:
Glennis Dickhouse Yeager
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
subject linked to:
Glennis
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1
linked to: Bell X-1