Douglas DC-4
E472075
The Douglas DC-4 is a four-engine propeller-driven airliner developed in the 1940s that became a widely used long-range civilian transport aircraft after World War II.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Douglas DC-4 canonical | 9 |
How this entity was disambiguated
This entity first appeared as the object of triple T4788329 — 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: Douglas DC-4 Context triple: [Douglas C-54 Skymaster, civilianVariant, Douglas DC-4]
-
A.
Douglas DC-3
The Douglas DC-3 is a pioneering twin-engine propeller-driven airliner and transport aircraft introduced in the 1930s that revolutionized commercial aviation with its reliability, range, and capacity.
-
B.
Douglas DC-6
The Douglas DC-6 is a four-engine, propeller-driven airliner and cargo aircraft introduced in the late 1940s, widely used by airlines and militaries around the world for medium- to long-haul flights.
-
C.
Douglas DC-7
The Douglas DC-7 is a long-range, four‑engine propeller-driven airliner introduced in the 1950s, known as one of the last major piston-powered transports before the jet age.
-
D.
Douglas C-54 Skymaster
The Douglas C-54 Skymaster is a four‑engine, long‑range military transport aircraft developed from the DC‑4 airliner and widely used by the U.S. and allied forces during and after World War II.
-
E.
Boeing 377 Stratocruiser
The Boeing 377 Stratocruiser was a large, luxurious post–World War II long-range airliner derived from the C-97 Stratofreighter, noted for its double-deck cabin and use on premier international routes.
- 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: Douglas DC-4 Target entity description: The Douglas DC-4 is a four-engine propeller-driven airliner developed in the 1940s that became a widely used long-range civilian transport aircraft after World War II.
-
A.
Douglas DC-3
The Douglas DC-3 is a pioneering twin-engine propeller-driven airliner and transport aircraft introduced in the 1930s that revolutionized commercial aviation with its reliability, range, and capacity.
-
B.
Douglas DC-6
The Douglas DC-6 is a four-engine, propeller-driven airliner and cargo aircraft introduced in the late 1940s, widely used by airlines and militaries around the world for medium- to long-haul flights.
-
C.
Douglas DC-7
The Douglas DC-7 is a long-range, four‑engine propeller-driven airliner introduced in the 1950s, known as one of the last major piston-powered transports before the jet age.
-
D.
Douglas C-54 Skymaster
The Douglas C-54 Skymaster is a four‑engine, long‑range military transport aircraft developed from the DC‑4 airliner and widely used by the U.S. and allied forces during and after World War II.
-
E.
Boeing 377 Stratocruiser
The Boeing 377 Stratocruiser was a large, luxurious post–World War II long-range airliner derived from the C-97 Stratofreighter, noted for its double-deck cabin and use on premier international routes.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
airliner
ⓘ
civil transport aircraft ⓘ four‑engine propeller‑driven aircraft ⓘ |
| aircraftCategory | transport aircraft ⓘ |
| construction | all‑metal stressed‑skin ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | 4 ⓘ |
| cruiseSpeed | 280 kn ⓘ |
| developedInto |
Douglas DC-6
NERFINISHED
ⓘ
Douglas DC-7 NERFINISHED ⓘ |
| engineModel | Pratt & Whitney R-2000 Twin Wasp NERFINISHED ⓘ |
| engineType | piston engine ⓘ |
| era | 1940s ⓘ |
| firstFlight | 1938-06-07 ⓘ |
| fuselageType | all‑metal ⓘ |
| height | 8.4 m ⓘ |
| introduced | 1942 ⓘ |
| landingGear | tricycle retractable landing gear ⓘ |
| length | 28.6 m ⓘ |
| manufacturer | Douglas Aircraft Company NERFINISHED ⓘ |
| maximumPassengerCapacity | 80 ⓘ |
| maximumTakeoffWeight | 29700 kg ⓘ |
| militaryDesignation |
C-54 Skymaster
NERFINISHED
ⓘ
R5D NERFINISHED ⓘ |
| notableFeature | pioneered long‑range post‑war civilian air travel ⓘ |
| numberBuilt | 1245 ⓘ |
| numberOfEngines | 4 ⓘ |
| pressurization | unpressurized cabin ⓘ |
| primaryUsers |
American Airlines
NERFINISHED
ⓘ
Pan American World Airways NERFINISHED ⓘ United States Army Air Forces NERFINISHED ⓘ United States Navy NERFINISHED ⓘ |
| propulsion | four propellers ⓘ |
| range | 4300 km ⓘ |
| retired | fromMajorAirlineServiceIn1960s ⓘ |
| role |
long‑range airliner
ⓘ
military transport aircraft ⓘ |
| serviceCeiling | 22800 ft ⓘ |
| successor | Douglas DC-6 NERFINISHED ⓘ |
| tailConfiguration | single vertical stabilizer ⓘ |
| typicalPassengerCapacity | 44 ⓘ |
| usedFor |
aerial firefighting (converted aircraft)
ⓘ
cargo transport ⓘ transoceanic passenger services ⓘ |
| usedInConflict |
Berlin Airlift
NERFINISHED
ⓘ
World War II ⓘ |
| wingConfiguration | low wing ⓘ |
| wingspan | 38.9 m ⓘ |
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: Douglas DC-4 Description of subject: The Douglas DC-4 is a four-engine propeller-driven airliner developed in the 1940s that became a widely used long-range civilian transport aircraft after World War II.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.