| gptkbp:instanceOf | gptkb:physical_phenomenon 
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                                | gptkbp:appliesTo | gptkb:aircraft gptkb:satellite
 Missiles
 Projectiles
 
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                                | gptkbp:cause | gptkb:Sonic_Boom 
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                                | gptkbp:challenge | Shock waves Increased drag
 Structural stress
 Thermal heating
 
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                                | gptkbp:definedIn | Speed greater than the speed of sound 
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                                | gptkbp:firstAchievedYear | 1947 
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                                | gptkbp:firstChampion | gptkb:Bell_X-1 
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                                | gptkbp:measures | gptkb:Mach_number 
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                                | gptkbp:notableAircraft | gptkb:SR-71_Blackbird gptkb:aircraft
 gptkb:Tu-144
 F-15 Eagle
 F-22 Raptor
 MiG-25
 
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                                | gptkbp:notableMission | gptkb:BrahMos gptkb:Meteor
 gptkb:Tomahawk_Block_IV
 
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                                | gptkbp:occurredIn | Aerodynamics 
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                                | gptkbp:relatedConcept | gptkb:Mach_number Aerodynamics
 Sonic boom
 Hypersonic speed
 Shock wave
 Speed of sound
 Transonic speed
 
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                                | gptkbp:relatedTo | Hypersonic Speed Transonic Speed
 
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                                | gptkbp:requires | Aerodynamic design High thrust-to-weight ratio
 
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                                | gptkbp:speedOfSoundAtSeaLevel | 343 m/s 
 | 
                        
                            
                                | gptkbp:studiedIn | gptkb:Fluid_Dynamics Aerospace Engineering
 
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                                | gptkbp:symbol | gptkb:Mach 
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                                | gptkbp:threshold | gptkb:Mach_1 
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                                | gptkbp:usedIn | gptkb:Ballistics gptkb:Missile_technology
 Space exploration
 Commercial aviation
 Military aviation
 
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                                | gptkbp:bfsParent | gptkb:Die_Happy gptkb:Jet_Fighter
 
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                                | gptkbp:bfsLayer | 8 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Supersonic Speed 
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