| gptkbp:instanceOf | gptkb:piston_engine 
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                                | gptkbp:combustionChambers | 1 
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                                | gptkbp:countryOfOrigin | gptkb:United_States 
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                                | gptkbp:culturalHeritage | gptkb:J-2_engine 
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                                | gptkbp:developedBy | gptkb:NASA 
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                                | gptkbp:diameter | 2.4 m 
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                                | gptkbp:engineCycle | gas-generator cycle 
 | 
                        
                            
                                | gptkbp:firstTestFired | 2011 
 | 
                        
                            
                                | gptkbp:intendedUse | gptkb:Space_Launch_System gptkb:Ares_I
 gptkb:Ares_V
 
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                                | gptkbp:length | 4.3 m 
 | 
                        
                            
                                | gptkbp:manufacturer | gptkb:Aerojet_Rocketdyne 
 | 
                        
                            
                                | gptkbp:mass | 2,470 kg 
 | 
                        
                            
                                | gptkbp:oxidizer | 5.5 
 | 
                        
                            
                                | gptkbp:projectCancelled | gptkb:Ares_I gptkb:Ares_V
 
 | 
                        
                            
                                | gptkbp:propulsion | liquid oxygen liquid hydrogen
 
 | 
                        
                            
                                | gptkbp:specificImpulseVacuum | 395 seconds 448 seconds
 
 | 
                        
                            
                                | gptkbp:status | development suspended 
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                                | gptkbp:testLocation | gptkb:Stennis_Space_Center 
 | 
                        
                            
                                | gptkbp:thrustSeaLevel | 1,159 kN 
 | 
                        
                            
                                | gptkbp:thrustVacuum | 1,307 kN 
 | 
                        
                            
                                | gptkbp:usedIn | no operational flights 
 | 
                        
                            
                                | gptkbp:usedOn | planned for upper stage 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Aerojet_Rocketdyne gptkb:Aerojet_Rocketdyne_Holdings
 gptkb:Aerojet_Rocketdyne_Holdings,_Inc.
 gptkb:NASA_Stennis_Space_Center
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | J-2X engine 
 |