@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix qkdv: <http://qudt.org/vocab/dimensionvector/> .
@prefix quantitykind: <http://qudt.org/vocab/quantitykind/> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix unit: <http://qudt.org/vocab/unit/> .
@prefix vaem: <http://www.linkedmodel.org/schema/vaem#> .

<http://qudt.org/extension/propulsion/vocab/unit>
  a owl:Ontology ;
  owl:imports <http://qudt.org/extension/propulsion/vocab/quantitykind> ;
  owl:imports <http://qudt.org/schema/facade/qudt> ;
  owl:imports <http://qudt.org/vocab/unit> ;
  owl:versionIRI <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:isDefinedBy <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:label "QUDT Propulsion Extension Units Vocabulary Version 3.4.0" ;
  vaem:hasGraphMetadata vaem:GMD_QUDT-PROPULSION-UNITS .

unit:IN-PER-SEC
  qudt:hasQuantityKind quantitykind:PropellantBurnRate .

unit:LB-PER-HR-PSI
  a qudt:Unit ;
  dcterms:description "quotient of the traditional unit avoirdupois pound for mass according to the avoirdupois system of units divided by the unit for time hour divided by the composed unit for pressure (pound-force per square inch)" ;
  qudt:conversionMultiplier 0.00000001827444755457889402712558428322733 ;
  qudt:conversionMultiplierSN 1.827444755457889402712558428322733E-8 ;
  qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T1D0 ;
  qudt:hasQuantityKind quantitykind:ThrusterPowerToThrustEfficiency ;
  qudt:iec61360Code "0112/2///62720#UAA684" ;
  qudt:symbol "lbm/(h·psi)" ;
  qudt:ucumCode "[lb_av].h-1.[psi]-1"^^qudt:UCUMcs ;
  qudt:uneceCommonCode "K74" ;
  rdfs:isDefinedBy <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:label "Pound Mass per Hour Psi" ;
  rdfs:label "Pound Mass per Hour Psi"@en .

unit:LB-PER-MIN-PSI
  a qudt:Unit ;
  dcterms:description "quotient of the traditional unit avoirdupois pound for mass according to the avoirdupois system of units and the unit minute for time divided by the composed unit for pressure (pound-force per square inch)" ;
  qudt:conversionMultiplier 0.00000109646685327473364162753505699364 ;
  qudt:conversionMultiplierSN 1.09646685327473364162753505699364E-6 ;
  qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T1D0 ;
  qudt:hasQuantityKind quantitykind:ThrusterPowerToThrustEfficiency ;
  qudt:iec61360Code "0112/2///62720#UAA691" ;
  qudt:symbol "lbm/(min·psi)" ;
  qudt:ucumCode "[lb_av].min-1.[psi]-1"^^qudt:UCUMcs ;
  qudt:uneceCommonCode "K80" ;
  rdfs:isDefinedBy <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:label "Pound Mass per Minute Psi" ;
  rdfs:label "Pound Mass per Minute Psi"@en .

unit:LB-PER-SEC-PSI
  a qudt:Unit ;
  dcterms:description "quotient of the traditional unit avoirdupois pound for mass according the avoirdupois system of units and the SI base unit second divided by the composed unit for pressure (pound-force per square inch)" ;
  qudt:conversionMultiplier 0.00006578801119648401849765210341961838 ;
  qudt:conversionMultiplierSN 6.578801119648401849765210341961838E-5 ;
  qudt:hasDimensionVector qkdv:A0E0L1I0M0H0T1D0 ;
  qudt:hasQuantityKind quantitykind:ThrusterPowerToThrustEfficiency ;
  qudt:iec61360Code "0112/2///62720#UAA694" ;
  qudt:symbol "lbm/(s·psi)" ;
  qudt:ucumCode "[lb_av].s-1.[psi]-1"^^qudt:UCUMcs ;
  qudt:uneceCommonCode "K83" ;
  rdfs:isDefinedBy <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:label "Pound Mass per Second Psi" ;
  rdfs:label "Pound Mass per Second Psi"@en .

vaem:GMD_QUDT-PROPULSION-UNITS
  a vaem:GraphMetaData ;
  dcterms:contributor "Jack Hodges" ;
  dcterms:contributor "Steve Ray" ;
  dcterms:created "2026-04-21"^^xsd:date ;
  dcterms:creator "Ralph Hodgson" ;
  dcterms:creator "Steve Ray" ;
  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 UNITS" ;
  dcterms:title "QUDT Propulsion Extension Units Version 3.4 Vocabulary" ;
  rdfs:isDefinedBy <http://qudt.org/extension/propulsion/vocab/unit> ;
  rdfs:label "QUDT Propulsion Extension Units Vocabulary Metadata Version 3.4.0" ;
  vaem:description "Propulsion-specific units and unit-to-quantity-kind relationships." ;
  vaem:graphTitle "QUDT Propulsion Extension Units Vocabulary Version 3.4.0" ;
  vaem:hasGraphRole vaem:VocabularyGraph ;
  vaem:intent "Provides a vocabulary of propulsion-specific units and unit mappings." ;
  vaem:isMetadataFor <http://qudt.org/extension/propulsion/vocab/unit> ;
  vaem:logo "https://qudt.org/linkedmodels.org/assets/lib/lm/images/logos/qudt_logo-300x110.png"^^xsd:anyURI ;
  vaem:namespace "http://qudt.org/vocab/unit/"^^xsd:anyURI ;
  vaem:namespacePrefix "unit" ;
  vaem:owner "QUDT.org" ;
  vaem:turtleFileURL "http://qudt.org/extension/propulsion/vocab/unit"^^xsd:anyURI ;
  vaem:usesNonImportedResource dcterms:created ;
  vaem:usesNonImportedResource dcterms:creator ;
  vaem:usesNonImportedResource dcterms:modified ;
  vaem:usesNonImportedResource dcterms:title .