@prefix rdf: . @prefix rdfs: . @prefix xsd: . @prefix owl: . @prefix dc: . @prefix dcterms: . @prefix qkdv: . @prefix quantitykind: . @prefix qudt: . @prefix skos: . @prefix vaem: . @prefix voag: . a owl:Ontology ; owl:imports ; owl:imports ; owl:imports ; owl:imports ; owl:versionIRI ; rdfs:isDefinedBy ; rdfs:label "QUDT Propulsion Extension Quantity Kind Vocabulary Version 3.4.0" ; vaem:hasGraphMetadata vaem:GMD_QUDT-PROPULSION-QUANTITY-KINDS . quantitykind:CombustionChamberTemperature a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H1T0D0 ; qudt:symbol "T_c" ; rdfs:isDefinedBy ; rdfs:label "Combustion Chamber Temperature"@en ; skos:broader quantitykind:ThermodynamicTemperature . quantitykind:DensityOfTheExhaustGases a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L-3I0M1H0T0D0 ; qudt:latexSymbol "$\\rho$"^^qudt:LatexString ; rdfs:isDefinedBy ; rdfs:label "Density Of The Exhaust Gases"@en ; skos:broader quantitykind:Density . quantitykind:EarthClosestApproachVehicleVelocity a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:symbol "V_o" ; rdfs:isDefinedBy ; rdfs:label "Earth Closest Approach Vehicle Velocity"@en ; skos:broader quantitykind:VehicleVelocity . quantitykind:EffectiveExhaustVelocity a qudt:QuantityKind ; dcterms:description "The velocity of an exhaust stream after reduction by effects such as friction, non-axially directed flow, and pressure differences between the inside of the rocket and its surroundings. The effective exhaust velocity is one of two factors determining the thrust, or accelerating force, that a rocket can develop, the other factor being the quantity of reaction mass expelled from the rocket in unit time. In most cases, the effective exhaust velocity is close to the actual exhaust velocity."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:plainTextDescription "The velocity of an exhaust stream after reduction by effects such as friction, non-axially directed flow, and pressure differences between the inside of the rocket and its surroundings. The effective exhaust velocity is one of two factors determining the thrust, or accelerating force, that a rocket can develop, the other factor being the quantity of reaction mass expelled from the rocket in unit time. In most cases, the effective exhaust velocity is close to the actual exhaust velocity." ; qudt:symbol "v_{e}" ; rdfs:isDefinedBy ; rdfs:label "Effective Exhaustvelocity"@en ; skos:broader quantitykind:Velocity . quantitykind:ElectricPropulsionPropellantMass a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M1H0T0D0 ; qudt:symbol "M_P" ; rdfs:isDefinedBy ; rdfs:label "Electric Propulsion Propellant Mass"@en ; skos:broader quantitykind:PropellantMass . quantitykind:EllipticalOrbitApogeeVelocity a qudt:QuantityKind ; dcterms:description "Velocity at apogee for an elliptical orbit velocity"^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:plainTextDescription "Velocity at apogee for an elliptical orbit velocity" ; qudt:symbol "V_a" ; rdfs:isDefinedBy ; rdfs:label "Elliptical Orbit Apogee Velocity"@en ; skos:broader quantitykind:VehicleVelocity . quantitykind:EllipticalOrbitPerigeeVelocity a qudt:QuantityKind ; dcterms:description "Velocity at apogee for an elliptical orbit velocity."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:plainTextDescription "Velocity at apogee for an elliptical orbit velocity." ; qudt:symbol "V_p" ; rdfs:isDefinedBy ; rdfs:label "Elliptical Orbit Perigee Velocity"@en ; skos:broader quantitykind:VehicleVelocity . quantitykind:ExhaustGasMeanMolecularWeight a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A1E0L0I0M0H0T0D0 ; rdfs:isDefinedBy ; rdfs:label "Exhaust Gas Mean Molecular Weight"@en . quantitykind:ExhaustGasesSpecificHeat a qudt:QuantityKind ; dcterms:description "Specific heat of exhaust gases at constant pressure."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L2I0M0H-1T-2D0 ; qudt:plainTextDescription "Specific heat of exhaust gases at constant pressure." ; qudt:symbol "c_p" ; rdfs:isDefinedBy ; rdfs:label "Exhaust Gases Specific Heat"@en ; skos:broader quantitykind:SpecificHeatCapacity . quantitykind:ExhaustStreamPower a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L2I0M1H0T-3D0 ; qudt:latexSymbol "$\\rho$"^^qudt:LatexString ; rdfs:isDefinedBy ; rdfs:label "Exhaust Stream Power"@en ; skos:broader quantitykind:Power . quantitykind:ExitPlaneCrossSectionalArea a qudt:QuantityKind ; dcterms:description "Cross-sectional area at exit plane of nozzle"^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L2I0M0H0T0D0 ; qudt:plainTextDescription "Cross-sectional area at exit plane of nozzle" ; qudt:symbol "A_{e}" ; rdfs:isDefinedBy ; rdfs:label "Exit Plane Cross-sectional Area"@en ; skos:broader quantitykind:Area . quantitykind:ExitPlanePressure a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L-1I0M1H0T-2D0 ; qudt:symbol "p_{e}" ; rdfs:isDefinedBy ; rdfs:label "Exit Plane Pressure"@en ; skos:broader quantitykind:Pressure . quantitykind:ExitPlaneTemperature a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H1T0D0 ; qudt:symbol "T_e" ; rdfs:isDefinedBy ; rdfs:label "Exit Plane Temperature"@en ; skos:broader quantitykind:Temperature . quantitykind:FirstStageMassRatio a qudt:QuantityKind ; dcterms:description "Mass ratio for the first stage of a multistage launcher."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H0T0D1 ; qudt:plainTextDescription "Mass ratio for the first stage of a multistage launcher." ; qudt:symbol "R_1" ; rdfs:isDefinedBy ; rdfs:label "First Stage Mass Ratio"@en ; skos:broader quantitykind:MassRatio . quantitykind:InitialNozzleThroatDiameter a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T0D0 ; rdfs:isDefinedBy ; rdfs:label "Initial Nozzle Throat Diameter"@en ; skos:broader quantitykind:NozzleThroatDiameter . quantitykind:NozzleThroatCrossSectionalArea a qudt:QuantityKind ; dcterms:description "Cross-sectional area of the nozzle at the throat."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L2I0M0H0T0D0 ; qudt:plainTextDescription "Cross-sectional area of the nozzle at the throat." ; qudt:symbol "A^*" ; rdfs:isDefinedBy ; rdfs:label "Nozzle Throat Cross-sectional Area"@en ; skos:broader quantitykind:Area . quantitykind:NozzleThroatDiameter a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T0D0 ; rdfs:isDefinedBy ; rdfs:label "Nozzle Throat Diameter"@en ; skos:broader quantitykind:Length . quantitykind:NozzleThroatPressure a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L-1I0M1H0T-2D0 ; qudt:symbol "p^*" ; rdfs:isDefinedBy ; rdfs:label "Nozzle Throat Pressure"@en ; skos:broader quantitykind:Pressure . quantitykind:NozzleWallsThrustReaction a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M1H0T-2D0 ; qudt:symbol "F_R" ; rdfs:isDefinedBy ; rdfs:label "Nozzle Walls Thrust Reaction"@en ; skos:broader quantitykind:Force . quantitykind:PropellantBurnRate a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; rdfs:isDefinedBy ; rdfs:label "Propellant Burn Rate"@en ; skos:broader quantitykind:BurnRate . quantitykind:PropellantMass a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M1H0T0D0 ; qudt:symbol "M_f" ; rdfs:isDefinedBy ; rdfs:label "Propellant Mass"@en ; skos:broader quantitykind:Mass . quantitykind:PropellantMeanBulkTemperature a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H1T0D0 ; rdfs:isDefinedBy ; rdfs:label "Propellant Mean Bulk Temperature"@en ; skos:altLabel "PMBT" ; skos:broader quantitykind:PropellantTemperature . quantitykind:PropellantTemperature a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H1T0D0 ; rdfs:isDefinedBy ; rdfs:label "Propellant Temperature"@en ; skos:broader quantitykind:Temperature . quantitykind:RocketAtmosphericTransverseForce a qudt:QuantityKind ; dcterms:description "Transverse force on rocket due to an atmosphere"^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L1I0M1H0T-2D0 ; qudt:plainTextDescription "Transverse force on rocket due to an atmosphere" ; qudt:symbol "T" ; rdfs:isDefinedBy ; rdfs:label "Rocket Atmospheric Transverse Force"@en ; skos:broader quantitykind:Force . quantitykind:SecondStageMassRatio a qudt:QuantityKind ; dcterms:description "Mass ratio for the second stage of a multistage launcher."^^qudt:LatexString ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H0T0D1 ; qudt:plainTextDescription "Mass ratio for the second stage of a multistage launcher." ; qudt:symbol "R_2" ; rdfs:isDefinedBy ; rdfs:label "Second Stage Mass Ratio"@en ; skos:broader quantitykind:MassRatio . quantitykind:SingleStageLauncherMassRatio a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M0H0T0D1 ; qudt:symbol "R_o" ; rdfs:isDefinedBy ; rdfs:label "Single Stage Launcher Mass Ratio"@en ; skos:broader quantitykind:MassRatio . quantitykind:StagePropellantMass a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M1H0T0D0 ; qudt:symbol "M_F" ; rdfs:isDefinedBy ; rdfs:label "Stage Propellant Mass"@en ; skos:broader quantitykind:Mass . quantitykind:StageStructuralMass a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L0I0M1H0T0D0 ; qudt:symbol "M_S" ; rdfs:isDefinedBy ; rdfs:label "Stage Structure Mass"@en ; skos:broader quantitykind:Mass . quantitykind:ThrusterPowerToThrustEfficiency a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T1D0 ; qudt:latexSymbol "$\\eta$"^^qudt:LatexString ; rdfs:isDefinedBy ; rdfs:label "Thruster Power To Thrust Efficiency"@en . quantitykind:TrueExhaustVelocity a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:symbol "u_{e}" ; rdfs:isDefinedBy ; rdfs:label "True Exhaust Velocity"@en ; skos:broader quantitykind:Velocity . quantitykind:VehicleVelocity a qudt:QuantityKind ; qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T-1D0 ; qudt:symbol "V" ; rdfs:isDefinedBy ; rdfs:label "Vehicle Velocity"@en ; skos:broader quantitykind:Velocity . vaem:GMD_QUDT-PROPULSION-QUANTITY-KINDS a vaem:GraphMetaData ; dcterms:contributor "Jack Hodges" ; dcterms:contributor "Steve Ray" ; dcterms:created "2019-08-01T16:25:54.850+00:00"^^xsd:dateTime ; dcterms:creator "Ralph Hodgson" ; dcterms:creator "Steve Ray" ; dcterms:description "Provides some propulsion-specific quantity kinds."^^qudt:LatexString ; dcterms:modified "2026-06-25T12:34:17Z"^^xsd:dateTime ; dcterms:rights "The QUDT Ontologies are issued under a Creative Commons Attribution 4.0 International License (CC BY 4.0), available at https://creativecommons.org/licenses/by/4.0/. Attribution should be made to QUDT.org" ; dcterms:subject "PROPULSION QUANTITY-KINDS" ; dcterms:title "QUDT Propulsion Extension Quantity Kind Version 3.4 Vocabulary" ; rdfs:isDefinedBy ; rdfs:label "QUDT Propulsion Extension Quantity Kind Vocabulary Metadata Version 3.4.0" ; vaem:applicableDiscipline "Propulsion" ; vaem:applicableDomain "Science, Medicine and Engineering" ; vaem:dateCreated "2026-04-21T21:26:38"^^xsd:dateTime ; vaem:graphTitle "QUDT Propulsion Extension Quantity Kind Vocabulary Version 3.4.0" ; vaem:hasGraphRole vaem:VocabularyGraph ; vaem:intent "Provides a vocabulary of propulsion-specific quantity kinds." ; vaem:isMetadataFor ; vaem:logo "https://qudt.org/linkedmodels.org/assets/lib/lm/images/logos/qudt_logo-300x110.png" ; vaem:namespace "http://qudt.org/vocab/quantitykind/"^^xsd:anyURI ; vaem:namespacePrefix "quantitykind" ; vaem:owner "qudt.org" ; vaem:specificity 1 ; vaem:turtleFileURL "http://qudt.org/extension/propulsion/vocab/quantitykind"^^xsd:anyURI ; vaem:usesNonImportedResource dc:contributor ; vaem:usesNonImportedResource dc:creator ; vaem:usesNonImportedResource dc:description ; vaem:usesNonImportedResource dc:rights ; vaem:usesNonImportedResource dc:subject ; vaem:usesNonImportedResource dc:title ; vaem:usesNonImportedResource dcterms:contributor ; vaem:usesNonImportedResource dcterms:created ; vaem:usesNonImportedResource dcterms:creator ; vaem:usesNonImportedResource dcterms:description ; vaem:usesNonImportedResource dcterms:modified ; vaem:usesNonImportedResource dcterms:rights ; vaem:usesNonImportedResource dcterms:subject ; vaem:usesNonImportedResource dcterms:title ; vaem:usesNonImportedResource ; vaem:usesNonImportedResource skos:closeMatch ; vaem:usesNonImportedResource skos:exactMatch ; vaem:usesNonImportedResource voag:QUDT-Attribution ; vaem:usesNonImportedResource voag:QUDT-QUANTITY-KINDS-VocabCatalogEntry_v1.2 ; vaem:withAttributionTo ; vaem:withAttributionTo voag:QUDT-Attribution .