LR-87
E135178
The LR-87 is a powerful American liquid-fueled rocket engine, originally developed by Aerojet for the Titan family of launch vehicles and used in various configurations for both military and space missions.
All labels observed (8)
| Label | Occurrences |
|---|---|
| LR-87 canonical | 2 |
| LR-87-3 | 1 |
| LR-87-5 | 1 |
| LR-87-AJ-11 | 1 |
| LR-87-AJ-5 | 1 |
| LR-87-AJ-7 | 1 |
| LR-87-AJ-9 | 1 |
| LR87-7 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1181358 — 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: LR-87 Context triple: [Titan IIIE, firstStageEngineType, LR-87]
-
A.
Beryl assault rifle
The Beryl assault rifle is a Polish-designed 5.56×45mm NATO service rifle widely used as the primary infantry weapon of Poland’s armed forces.
-
B.
Beretta 84 pistol
The Beretta 84 pistol is a compact, double-stack .380 ACP semi-automatic handgun from Beretta’s Cheetah series, known for its high magazine capacity, reliability, and use as both a civilian and law-enforcement sidearm.
-
C.
Lyle gun
The Lyle gun is a small, line-throwing cannon historically used in maritime rescue operations to fire a rope to ships in distress from shore.
-
D.
Speer
Speer is a German surname most famously associated with Albert Speer, the Nazi architect and Minister of Armaments and War Production during World War II.
-
E.
F88 Austeyr rifle
The F88 Austeyr rifle is the standard-issue, Australian-licensed variant of the Steyr AUG bullpup assault rifle, widely used by the Australian Defence Force.
- 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: LR-87 Target entity description: The LR-87 is a powerful American liquid-fueled rocket engine, originally developed by Aerojet for the Titan family of launch vehicles and used in various configurations for both military and space missions.
-
A.
Beryl assault rifle
The Beryl assault rifle is a Polish-designed 5.56×45mm NATO service rifle widely used as the primary infantry weapon of Poland’s armed forces.
-
B.
Beretta 84 pistol
The Beretta 84 pistol is a compact, double-stack .380 ACP semi-automatic handgun from Beretta’s Cheetah series, known for its high magazine capacity, reliability, and use as both a civilian and law-enforcement sidearm.
-
C.
Lyle gun
The Lyle gun is a small, line-throwing cannon historically used in maritime rescue operations to fire a rope to ships in distress from shore.
-
D.
Speer
Speer is a German surname most famously associated with Albert Speer, the Nazi architect and Minister of Armaments and War Production during World War II.
-
E.
F88 Austeyr rifle
The F88 Austeyr rifle is the standard-issue, Australian-licensed variant of the Steyr AUG bullpup assault rifle, widely used by the Australian Defence Force.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | liquid-fueled rocket engine ⓘ |
| combustionChambers | 2 ⓘ |
| configuration | twin-chamber engine ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| developedBy |
Aerojet Rocketdyne
ⓘ
surface form:
Aerojet General Corporation
|
| developedFor |
Titan rocket family
ⓘ
surface form:
Titan I launch vehicle
Titan II launch vehicle ⓘ Titan IIIC ⓘ
surface form:
Titan III launch vehicle
Titan IV launch vehicle ⓘ |
| engineCycle | gas-generator cycle ⓘ |
| era | Cold War ⓘ |
| gimbalCapability | yes ⓘ |
| hasVariant |
LR-87
self-linksurface differs
ⓘ
surface form:
LR-87-3
LR-87 self-linksurface differs ⓘ
surface form:
LR-87-5
LR-87-7 ⓘ LR-87 self-linksurface differs ⓘ
surface form:
LR-87-AJ-11
LR-87 self-linksurface differs ⓘ
surface form:
LR-87-AJ-5
LR-87 self-linksurface differs ⓘ
surface form:
LR-87-AJ-7
LR-87 self-linksurface differs ⓘ
surface form:
LR-87-AJ-9
|
| laterOxidizer | nitrogen tetroxide ⓘ |
| laterPropellants | Aerozine 50 ⓘ |
| manufacturer |
Aerojet Rocketdyne
ⓘ
surface form:
Aerojet
|
| notableUse | Gemini program launches (Titan II GLV) ⓘ |
| originalOxidizer | liquid oxygen ⓘ |
| originalPropellants | RP-1 ⓘ |
| primaryRole | launch vehicle first-stage propulsion ⓘ |
| propellantFeedSystem | turbopump-fed ⓘ |
| propellantType | liquid propellant ⓘ |
| status | retired ⓘ |
| thrustAtSeaLevel_kN | approximately 1800 ⓘ |
| thrustInVacuum_kN | approximately 1900 ⓘ |
| thrustPhase | first stage ⓘ |
| usedAs |
booster engine
ⓘ
first-stage engine ⓘ |
| usedBy |
NASA
ⓘ
United States Air Force ⓘ |
| usedFor |
military missions
ⓘ
space launch missions ⓘ |
| usedIn |
Titan rocket family
ⓘ
surface form:
Titan family of launch vehicles
|
| usedOn |
Titan IIIC
ⓘ
surface form:
Titan 34D
Titan II GLV ⓘ Titan II ICBM ⓘ Titan IIIA ⓘ Titan IIIC ⓘ Titan IIIC ⓘ
surface form:
Titan IIID
Titan IIIE ⓘ Titan IV ⓘ |
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: LR-87 Description of subject: The LR-87 is a powerful American liquid-fueled rocket engine, originally developed by Aerojet for the Titan family of launch vehicles and used in various configurations for both military and space missions.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
LR87-7
this entity surface form:
LR-87-3
this entity surface form:
LR-87-5
this entity surface form:
LR-87-AJ-5
this entity surface form:
LR-87-AJ-7
this entity surface form:
LR-87-AJ-9
this entity surface form:
LR-87-AJ-11