Service Propulsion System (SPS)
E902154
The Service Propulsion System (SPS) was the main liquid-fueled rocket engine of the Apollo Service Module, used for major course corrections, lunar orbit insertion, and trans-Earth injection during Apollo missions.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Service Propulsion System | 2 |
| Service Propulsion System (SPS) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11077981 — 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: Service Propulsion System (SPS) Context triple: [Kitty Hawk, serviceModuleEngine, Service Propulsion System (SPS)]
-
A.
Orbital Maneuvering System
The Orbital Maneuvering System was the Space Shuttle’s pair of rear-mounted rocket engines used for orbital insertion, adjustment, and deorbit burns.
-
B.
Space Shuttle Main Engines
The Space Shuttle Main Engines were highly efficient, reusable liquid-fuel rocket engines that powered NASA’s Space Shuttle orbiters during launch and ascent into space.
-
C.
SLS solid rocket boosters
The SLS solid rocket boosters are powerful, expendable strap-on boosters used on NASA’s Space Launch System to provide the majority of thrust during the initial phase of launch for Artemis missions to the Moon.
-
D.
S200 solid rocket booster
The S200 solid rocket booster is a powerful strap-on booster used on India's GSLV Mk III launch vehicle to provide the high-thrust initial phase of ascent.
-
E.
Raptor engine
The Raptor engine is SpaceX’s next-generation full-flow staged combustion methane-fueled rocket engine designed to power the Starship launch system.
- 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: Service Propulsion System (SPS) Target entity description: The Service Propulsion System (SPS) was the main liquid-fueled rocket engine of the Apollo Service Module, used for major course corrections, lunar orbit insertion, and trans-Earth injection during Apollo missions.
-
A.
Orbital Maneuvering System
The Orbital Maneuvering System was the Space Shuttle’s pair of rear-mounted rocket engines used for orbital insertion, adjustment, and deorbit burns.
-
B.
Space Shuttle Main Engines
The Space Shuttle Main Engines were highly efficient, reusable liquid-fuel rocket engines that powered NASA’s Space Shuttle orbiters during launch and ascent into space.
-
C.
SLS solid rocket boosters
The SLS solid rocket boosters are powerful, expendable strap-on boosters used on NASA’s Space Launch System to provide the majority of thrust during the initial phase of launch for Artemis missions to the Moon.
-
D.
S200 solid rocket booster
The S200 solid rocket booster is a powerful strap-on booster used on India's GSLV Mk III launch vehicle to provide the high-thrust initial phase of ascent.
-
E.
Raptor engine
The Raptor engine is SpaceX’s next-generation full-flow staged combustion methane-fueled rocket engine designed to power the Starship launch system.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Apollo spacecraft component
ⓘ
liquid-fueled rocket engine ⓘ rocket engine ⓘ spacecraft propulsion system ⓘ |
| alsoKnownAs | SPS ⓘ |
| combustionChambers | 1 ⓘ |
| control | gimbaled for thrust vector control ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designedForEnvironment | vacuum of space ⓘ |
| developedFor | NASA ⓘ |
| engineCycle | pressure-fed ⓘ |
| fuel | Aerozine 50 ⓘ |
| gimbalRange | about 6 degrees ⓘ |
| ignitionType | hypergolic ignition ⓘ |
| manufacturer |
Aerojet
ⓘ
linked to:
Aerojet Rocketdyne
|
| mountingLocation | rear of Apollo Service Module ⓘ |
| nozzles | 1 ⓘ |
| operator | NASA ⓘ |
| oxidizer | nitrogen tetroxide ⓘ |
| partOf |
Apollo Service Module
ⓘ
linked to:
Apollo Service Module Block II
|
| programEra |
1960s
ⓘ
1970s ⓘ |
| propellantFeedSystem | helium pressurization ⓘ |
| propellantType | hypergolic ⓘ |
| reliabilityRequirement | high reliability single main engine ⓘ |
| restartCapability | multiple restarts ⓘ |
| spaceProgram | Apollo program ⓘ |
| specificImpulseVacuum | about 314 s ⓘ |
| status | retired ⓘ |
| thrustVacuum |
about 20,500 lbf
ⓘ
about 91 kN ⓘ |
| usedFor |
abort maneuvers from lunar orbit
ⓘ
lunar orbit insertion ⓘ major course corrections ⓘ midcourse corrections ⓘ trans-Earth injection ⓘ |
| usedOn |
Apollo Command and Service Module
ⓘ
linked to:
Apollo command and service module
Apollo spacecraft ⓘ |
| usedOnMission |
Apollo 10
ⓘ
Apollo 11 ⓘ Apollo 12 ⓘ Apollo 13 ⓘ Apollo 14 ⓘ Apollo 15 ⓘ Apollo 16 ⓘ Apollo 17 ⓘ Apollo 7 ⓘ Apollo 8 ⓘ Apollo 9 ⓘ Apollo–Soyuz Test Project ⓘ |
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: Service Propulsion System (SPS) Description of subject: The Service Propulsion System (SPS) was the main liquid-fueled rocket engine of the Apollo Service Module, used for major course corrections, lunar orbit insertion, and trans-Earth injection during Apollo missions.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Service Propulsion System (SPS)
linked to: Service Propulsion System (SPS)