Rocketdyne H-1
E259960
The Rocketdyne H-1 was a kerosene/liquid-oxygen rocket engine developed in the United States and used on early Saturn launch vehicles during the Apollo era.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Rocketdyne H-1 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2372456 — 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: Rocketdyne H-1 Context triple: [Saturn I, firstStageEngineType, Rocketdyne H-1]
-
A.
Curtiss-Wright XLR25 rocket engine
The Curtiss-Wright XLR25 was an American liquid-fueled rocket engine developed in the 1950s to power high-speed experimental research aircraft such as the Bell X-2.
-
B.
SNECMA Atar 8K-50
The SNECMA Atar 8K-50 is a French afterburning turbojet engine developed in the mid-20th century and used to power several combat aircraft, notably Dassault fighter and attack jets.
-
C.
Rolls-Royce Turbomeca RTM322
The Rolls-Royce Turbomeca RTM322 is a turboshaft aircraft engine developed for medium-lift military helicopters, notably powering types such as the NH90 and Apache.
-
D.
Turbo-Union RB199
The Turbo-Union RB199 is a tri-nationally developed afterburning turbofan jet engine used to power the Panavia Tornado strike aircraft.
-
E.
Rolls-Royce/Snecma Olympus 593
The Rolls-Royce/Snecma Olympus 593 is a turbojet engine jointly developed by British and French manufacturers to power the supersonic Concorde airliner at sustained Mach 2 cruise speeds.
- 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: Rocketdyne H-1 Target entity description: The Rocketdyne H-1 was a kerosene/liquid-oxygen rocket engine developed in the United States and used on early Saturn launch vehicles during the Apollo era.
-
A.
Curtiss-Wright XLR25 rocket engine
The Curtiss-Wright XLR25 was an American liquid-fueled rocket engine developed in the 1950s to power high-speed experimental research aircraft such as the Bell X-2.
-
B.
SNECMA Atar 8K-50
The SNECMA Atar 8K-50 is a French afterburning turbojet engine developed in the mid-20th century and used to power several combat aircraft, notably Dassault fighter and attack jets.
-
C.
Rolls-Royce Turbomeca RTM322
The Rolls-Royce Turbomeca RTM322 is a turboshaft aircraft engine developed for medium-lift military helicopters, notably powering types such as the NH90 and Apache.
-
D.
Turbo-Union RB199
The Turbo-Union RB199 is a tri-nationally developed afterburning turbofan jet engine used to power the Panavia Tornado strike aircraft.
-
E.
Rolls-Royce/Snecma Olympus 593
The Rolls-Royce/Snecma Olympus 593 is a turbojet engine jointly developed by British and French manufacturers to power the supersonic Concorde airliner at sustained Mach 2 cruise speeds.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
chemical rocket engine
ⓘ
liquid-fuel rocket engine ⓘ |
| chamberPressure | about 48 bar ⓘ |
| combustionChambers | 1 ⓘ |
| coolingMethod | regenerative cooling ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cycle | gas-generator cycle ⓘ |
| developedFor | early Saturn launch vehicles ⓘ |
| developmentPeriod | late 1950s ⓘ |
| engineType | open-cycle gas-generator engine ⓘ |
| era | Apollo program era ⓘ |
| firstFlightUse | Saturn I test flights ⓘ |
| fuel | RP-1 kerosene ⓘ |
| gimbalCapability | gimballed for thrust vector control ⓘ |
| heritage | derived from earlier Navaho and Thor/Jupiter engine technology ⓘ |
| ignitionSystem | pyrotechnic ignition ⓘ |
| manufacturer |
Pratt & Whitney Rocketdyne
ⓘ
surface form:
Rocketdyne
|
| mountingConfiguration | clustered engine arrangement ⓘ |
| nozzles | 1 ⓘ |
| numberPerStage |
8 on Saturn I first stage
ⓘ
8 on Saturn IB first stage ⓘ |
| oxidizer | liquid oxygen ⓘ |
| propellantFeed | turbopump-fed ⓘ |
| propellantMixtureRatio | approximately 2.25:1 O/F ⓘ |
| propellantType | bipropellant ⓘ |
| reusability | expendable engine ⓘ |
| specificImpulseSeaLevel | about 263 s ⓘ |
| specificImpulseVacuum | about 289 s ⓘ |
| status | retired ⓘ |
| successor | RS-27 rocket engine ⓘ |
| throttleCapability | non-throttleable (on-off operation) ⓘ |
| thrustSeaLevel |
about 188,000 lbf
ⓘ
about 836 kN ⓘ |
| thrustVacuum |
about 205,000 lbf
ⓘ
about 912 kN ⓘ |
| usedByAgency |
NASA
ⓘ
Army Ballistic Missile Agency ⓘ
surface form:
United States Army (via early Saturn development)
|
| usedFor |
crew-rated launch vehicles
ⓘ
orbital launch ⓘ |
| usedInMissionType |
Apollo test missions
ⓘ
Earth-orbit missions ⓘ |
| usedInProgram | Apollo program ⓘ |
| usedOn |
Saturn I
ⓘ
Saturn IB ⓘ |
| usedOnLaunchVehicleFamily |
Saturn rocket family
ⓘ
surface form:
Saturn family of launch vehicles
|
| usedOnStage |
Saturn I
ⓘ
surface form:
Saturn I first stage S-I
Saturn IB ⓘ
surface form:
Saturn IB first stage S-IB
|
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: Rocketdyne H-1 Description of subject: The Rocketdyne H-1 was a kerosene/liquid-oxygen rocket engine developed in the United States and used on early Saturn launch vehicles during the Apollo era.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.