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fuel.xml
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fuel.xml
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<?xml version="1.0"?>
<system name="fuel">
<!-- ac1, ac2, dc; 0=OFF, 1=AUTO, 2=ON-->
<!-- xfeed; -1=LEFT TANK, 0=XFEED, 1=RIGHT TANK-->
<property value="1">/controls/fuel/valves/ac1</property>
<property value="1">/controls/fuel/valves/ac2</property>
<property value="1">/controls/fuel/valves/dc</property>
<property value="0">/controls/fuel/valves/xfeed</property>
<property value="0">systems/fuel/flows/auxiliar-wing-tank-flow</property>
<property value="1">systems/fuel/eicas/unit-pounds</property>
<property value="0">systems/fuel/eicas/unit-kg</property>
<!--Fuel Flows-->
<function name="systems/fuel/eicas/left-ff-pph">
<description>Fuel Flow in PPH</description>
<integer>
<product>
<property>systems/fuel/flows/left-injector-rate-pps</property>
<value>3600</value> <!--3600s/hour-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/left-ff-kph">
<description>Fuel Flow in KPH</description>
<integer>
<product>
<property>systems/fuel/eicas/left-ff-pph</property>
<value>0.453592</value> <!--KG per Pound converter-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/right-ff-pph">
<description>Fuel Flow in PPH</description>
<integer>
<product>
<property>systems/fuel/flows/right-injector-rate-pps</property>
<value>3600</value> <!--3600s/hour-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/right-ff-kph">
<description>Fuel Flow in KPH</description>
<integer>
<product>
<property>systems/fuel/eicas/right-ff-pph</property>
<value>0.453592</value> <!--KG per Pound converter-->
</product>
</integer>
</function>
<!--Fuel Quantity-->
<function name="systems/fuel/eicas/fuel-qty-lbs">
<description>Total fuel on board LBS</description>
<integer>
<property>propulsion/total-fuel-lbs</property>
</integer>
</function>
<function name="systems/fuel/eicas/fuel-qty-kg">
<description>Total fuel on board KG</description>
<integer>
<product>
<property>systems/fuel/eicas/fuel-qty-lbs</property>
<value>0.453592</value> <!--KG per Pound converter-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/left-fuel-qty-lbs">
<integer><sum>
<property>propulsion/tank[0]/contents-lbs</property>
<property>propulsion/tank[6]/contents-lbs</property>
</sum></integer>
</function>
<function name="systems/fuel/eicas/right-fuel-qty-lbs">
<integer><sum>
<property>propulsion/tank[4]/contents-lbs</property>
<property>propulsion/tank[7]/contents-lbs</property>
</sum></integer>
</function>
<function name="systems/fuel/eicas/left-fuel-qty-kg">
<description>Left fuel on board KG</description>
<integer>
<product>
<property>systems/fuel/eicas/left-fuel-qty-lbs</property>
<value>0.453592</value> <!--KG per Pound converter-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/right-fuel-qty-kg">
<description>Right fuel on board KG</description>
<integer>
<product>
<property>systems/fuel/eicas/right-fuel-qty-lbs</property>
<value>0.453592</value> <!--KG per Pound converter-->
</product>
</integer>
</function>
<function name="systems/fuel/eicas/fuel-balance-delta">
<description>registers left right fuel imbalance</description>
<abs><difference>
<property>systems/fuel/eicas/left-fuel-qty-lbs</property>
<property>systems/fuel/eicas/right-fuel-qty-lbs</property>
</difference></abs>
</function>
<!-- Heat conduction -->
<function name="systems/fuel/fcoc/conduction/environmental">
<description>Heat conduction via wing</description>
<product>
<difference>
<property>propulsion/tat-c</property>
<property>/consumables/fuel/tank[0]/temperature_degC</property>
</difference> <!-- dT-->
<value>0.000084</value> <!-- kA/d-->
</product>
</function>
<function name="systems/fuel/fcoc/conduction/left-engine">
<description>Heat conduction via fcoc left</description>
<product>
<difference>
<property>/engines/engine[0]/oil-temperature-degc</property>
<property>/consumables/fuel/tank[0]/temperature_degC</property>
</difference> <!-- dT-->
<value>0.0000065</value> <!-- kA/d-->
<property>systems/fuel/pump/left-powered</property>
</product>
</function>
<function name="systems/fuel/fcoc/conduction/right-engine">
<description>Heat conduction via fcoc left</description>
<product>
<difference>
<property>/engines/engine[1]/oil-temperature-degc</property>
<property>/consumables/fuel/tank[0]/temperature_degC</property>
</difference> <!-- dT-->
<value>0.0000065</value> <!-- kA/d-->
<property>systems/fuel/pump/right-powered</property>
</product>
</function>
<function name="systems/fuel/fcoc/fuel-temperature-degC">
<integer>
<property>/consumables/fuel/tank[0]/temperature_degC</property>
</integer>
</function>
<function name="systems/fuel/fcoc/fuel-temperature-degF">
<integer>
<sum>
<value>32</value>
<product>
<value>1.8</value>
<property>/consumables/fuel/tank[0]/temperature_degC</property>
</product>
</sum>
</integer>
</function>
<channel name="Fuel Xfeed">
<switch name="fuel-AC1">
<default value="/controls/fuel/valves/ac1"/>
<output>systems/fuel/ac1-switch</output>
</switch>
<switch name="fuel-AC2">
<default value="/controls/fuel/valves/ac2"/>
<output>systems/fuel/ac2-switch</output>
</switch>
<switch name="fuel-DC">
<default value="/controls/fuel/valves/dc"/>
<output>systems/fuel/dc-switch</output>
</switch>
<switch name="fuel-XFEED">
<default value="/controls/fuel/valves/xfeed"/>
<output>systems/fuel/xfeed-switch</output>
</switch>
</channel>
<channel name="Electrical Busses">
<switch name="ac-bus1">
<default value="0"/>
<test logic="OR" value="1">
/systems/electrical/left-bus gt 10
</test>
<output>systems/fuel/electrical/ac-bus1</output>
</switch>
<switch name="ac-bus2">
<default value="0"/>
<test logic="OR" value="1">
/systems/electrical/right-bus gt 10
</test>
<output>systems/fuel/electrical/ac-bus2</output>
</switch>
<switch name="RAT">
<default value="/controls/electric/ram-air-turbine"/>
<output>systems/fuel/electrical/RAT</output>
</switch>
<switch name="dc-bus1">
<default value="0"/>
<test logic="OR" value="1">
/controls/electric/APU-generator == 1
/controls/electric/external-power == 1
/systems/electrical/right-bus gt 3
</test>
<output>systems/fuel/electrical/dc-bus1</output>
</switch>
<switch name="dc-bus2">
<default value="0"/>
<test logic="OR" value="1">
/controls/electric/APU-generator == 1
/controls/electric/external-power == 1
/systems/electrical/left-bus gt 3
</test>
<output>systems/fuel/electrical/dc-bus2</output>
</switch>
</channel>
<channel name="XFEED">
<!-- 0:No Xfeed, 1:Both tanks Xfeed,
2:Left Tank Xfeed, 3:Right Tank Xfeed-->
<switch name="xfeed configuration">
<default value="0"/>
<test logic="OR" value="0">
/systems/electrical/right-bus le 15
/systems/electrical/right-bus le 15
</test>
<test value="1">
systems/fuel/xfeed-switch == 0
</test>
<test value="2">
systems/fuel/xfeed-switch == -1
</test>
<test value="3">
systems/fuel/xfeed-switch == 1
</test>
<output>systems/fuel/pump/xfeed-status</output>
</switch>
<!-- AC and DC pumps, XFEED off; 0: OFF, 1: AUTO or ON -->
<switch name="AC PUMP 1 Status">
<default value="0"/>
<test logic="OR" value="0">
systems/fuel/electrical/ac-bus1 == 0
systems/fuel/pump/xfeed-status != 0
</test>
<test value="1">
systems/fuel/ac1-switch != 0
</test>
<output>systems/fuel/pump/ac1-status</output>
</switch>
<switch name="AC PUMP 2 Status">
<default value="0"/>
<test logic="OR" value="0">
systems/fuel/electrical/ac-bus2 == 0
systems/fuel/pump/xfeed-status != 0
</test>
<test value="1">
systems/fuel/ac2-switch != 0
</test>
<output>systems/fuel/pump/ac2-status</output>
</switch>
<switch name="DC PUMP Status">
<default value="0"/>
<test logic="OR" value="0">
systems/fuel/electrical/dc-bus1 == 0
systems/fuel/pump/xfeed-status != 0
systems/fuel/pump/ac1-status != 0
systems/fuel/pump/ac2-status != 0
</test>
<test value="1">
systems/fuel/dc-switch != 0
</test>
<output>systems/fuel/pump/dc-status</output>
</switch>
</channel>
<channel name="Pumps powered">
<switch name="Left wing powered">
<default value="0"/>
<test value="1">
/controls/fuel/tank[6]/boost-pump[0] == 1
/controls/fuel/tank[6]/boost-pump[1] == 1
</test>
<output>systems/fuel/pump/left-powered</output>
</switch>
<switch name="Right wing powered">
<default value="0"/>
<test value="1">
/controls/fuel/tank[7]/boost-pump[0] == 1
/controls/fuel/tank[7]/boost-pump[1] == 1
</test>
<output>systems/fuel/pump/right-powered</output>
</switch>
</channel>
<channel name="Fuel injectors">
<summer name="Left engine injector">
<input>propulsion/engine[0]/fuel-flow-rate-pps</input>
<output>systems/fuel/flows/left-injector-rate-pps</output>
</summer>
<summer name="Right engine injector">
<input>propulsion/engine[1]/fuel-flow-rate-pps</input>
<output>systems/fuel/flows/right-injector-rate-pps</output>
</summer>
</channel>
<channel name="XFEED Fuel distributors">
<summer name="xfeed-unilateral">
<input>systems/fuel/flows/left-injector-rate-pps</input>
<input>systems/fuel/flows/right-injector-rate-pps</input>
<output>systems/fuel/flows/unilateral-injector-rate-pps</output>
</summer>
<switch name="Left Draw">
<default value="systems/fuel/flows/unilateral-injector-rate-pps"/>
<test logic="OR" value="0">
systems/fuel/pump/left-powered == 0
systems/fuel/pump/xfeed-status == 0
systems/fuel/pump/xfeed-status == 3
propulsion/tank[0]/contents-lbs == 0
</test>
<test value="systems/fuel/flows/left-injector-rate-pps">
systems/fuel/pump/xfeed-status == 1
propulsion/tank[0]/contents-lbs gt 0
</test>
<output>systems/fuel/flows/left-draw</output>
</switch>
<switch name="Right Draw">
<default value="systems/fuel/flows/unilateral-injector-rate-pps"/>
<test logic="OR" value="0">
systems/fuel/pump/right-powered == 0
systems/fuel/pump/xfeed-status == 0
systems/fuel/pump/xfeed-status == 2
propulsion/tank[4]/contents-lbs == 0
</test>
<test value="systems/fuel/flows/right-injector-rate-pps">
systems/fuel/pump/xfeed-status == 1
propulsion/tank[4]/contents-lbs gt 0
</test>
<output>systems/fuel/flows/right-draw</output>
</switch>
<summer name="tanks total draw">
<input>systems/fuel/flows/left-draw</input>
<input>systems/fuel/flows/right-draw</input>
<output>systems/fuel/flows/xfeed-draw</output>
</summer>
<pure_gain name="systems/fuel/flows/collector-feed">
<input>systems/fuel/flows/xfeed-draw</input>
<gain>0.5</gain>
</pure_gain>
<!--XFEED aux tanks flow into wings while not empty-->
<switch name="xfeed tail trimmer">
<default value="systems/fuel/flows/xfeed-draw"/>
<test logic="OR" value="0.0">
propulsion/tank[5]/contents-lbs == 0
systems/fuel/pump/xfeed-status == 0
</test>
<output>systems/fuel/flows/trimmer-draw-rate</output>
</switch>
<switch name="central fuel tank">
<default value="systems/fuel/flows/xfeed-draw"/>
<test logic="OR" value="0.0">
propulsion/tank[1]/contents-lbs == 0
propulsion/tank[2]/contents-lbs gt 0
propulsion/tank[3]/contents-lbs gt 0
propulsion/tank[5]/contents-lbs gt 0
systems/fuel/pump/xfeed-status == 0
</test>
<output>systems/fuel/flows/central-draw-rate</output>
</switch>
<switch name="xfeed fwd aux">
<default value="systems/fuel/flows/collector-feed"/>
<test logic="OR" value="0.0">
propulsion/tank[5]/contents-lbs gt 0
propulsion/tank[2]/contents-lbs == 0
systems/fuel/pump/xfeed-status == 0
</test>
<output>systems/fuel/flows/fwdaux-draw-rate</output>
</switch>
<switch name="xfeed rear aux">
<default value="systems/fuel/flows/collector-feed"/>
<test logic="OR" value="0.0">
propulsion/tank[5]/contents-lbs gt 0
propulsion/tank[3]/contents-lbs == 0
systems/fuel/pump/xfeed-status == 0
</test>
<output>systems/fuel/flows/rearaux-draw-rate</output>
</switch>
<summer name="unilateral aux collect">
<input>systems/fuel/flows/trimmer-draw-rate</input>
<input>systems/fuel/flows/central-draw-rate</input>
<input>systems/fuel/flows/fwdaux-draw-rate</input>
<input>systems/fuel/flows/rearaux-draw-rate</input>
<output>systems/fuel/flows/unilateral-aux-collect-rate</output>
</summer>
<pure_gain name="systems/fuel/flows/bilateral-aux-collect-rate">
<input>systems/fuel/flows/unilateral-aux-collect-rate</input>
<gain>0.5</gain>
</pure_gain>
<switch name="Left collect">
<default value="systems/fuel/flows/bilateral-aux-collect-rate"/>
<test value="systems/fuel/flows/unilateral-aux-collect-rate">
systems/fuel/pump/xfeed-status == 2
</test>
<output>systems/fuel/flows/left-aux-collect-rate</output>
</switch>
<switch name="Right collect">
<default value="systems/fuel/flows/bilateral-aux-collect-rate"/>
<test value="systems/fuel/flows/unilateral-aux-collect-rate">
systems/fuel/pump/xfeed-status == 3
</test>
<output>systems/fuel/flows/right-aux-collect-rate</output>
</switch>
</channel>
<channel name="AC Fuel Distributors">
<switch name="Left Draw">
<default value="systems/fuel/flows/left-draw"/>
<test value="systems/fuel/flows/left-injector-rate-pps">
systems/fuel/pump/ac1-status != 0
</test>
<output>systems/fuel/flows/left-draw</output>
</switch>
<switch name="Right Draw">
<default value="systems/fuel/flows/right-draw"/>
<test value="systems/fuel/flows/right-injector-rate-pps">
systems/fuel/pump/ac2-status != 0
</test>
<output>systems/fuel/flows/right-draw</output>
</switch>
</channel>
<channel name="DC Fuel Distributor">
<switch name="Left Draw">
<default value="systems/fuel/flows/left-draw"/>
<test value="0">
systems/fuel/pump/dc-status != 0
</test>
<output>systems/fuel/flows/left-draw</output>
</switch>
<switch name="Right Draw">
<default value="systems/fuel/flows/right-draw"/>
<test value="systems/fuel/flows/unilateral-injector-rate-pps">
systems/fuel/pump/dc-status != 0
</test>
<output>systems/fuel/flows/right-draw</output>
</switch>
</channel>
<channel name="Fuel transferance">
<summer name="Left collector refeed from wing tanks">
<input>systems/fuel/flows/collector-feed</input>
<output>propulsion/tank[6]/external-flow-rate-pps</output>
</summer>
<summer name="Right collector refeed from wing tanks">
<input>systems/fuel/flows/collector-feed</input>
<output>propulsion/tank[7]/external-flow-rate-pps</output>
</summer>
<summer name="Left wing tank">
<input>-systems/fuel/flows/left-draw</input>
<input>systems/fuel/flows/left-aux-collect-rate</input>
<output>propulsion/tank[0]/external-flow-rate-pps</output>
</summer>
<summer name="Right wing tank">
<input>-systems/fuel/flows/right-draw</input>
<input>systems/fuel/flows/right-aux-collect-rate</input>
<output>propulsion/tank[4]/external-flow-rate-pps</output>
</summer>
<summer name="Central tank">
<input>-systems/fuel/flows/central-draw-rate</input>
<output>propulsion/tank[1]/external-flow-rate-pps</output>
</summer>
<summer name="Fwd Aux tank">
<input>-systems/fuel/flows/fwdaux-draw-rate</input>
<output>propulsion/tank[2]/external-flow-rate-pps</output>
</summer>
<summer name="Rear Aux tank">
<input>-systems/fuel/flows/rearaux-draw-rate</input>
<output>propulsion/tank[3]/external-flow-rate-pps</output>
</summer>
<summer name="Tail Trimmer Aux tank">
<input>-systems/fuel/flows/trimmer-draw-rate</input>
<output>propulsion/tank[5]/external-flow-rate-pps</output>
</summer>
</channel>
<channel name="FCOC">
<switch name="Fuel temp initializer"><!-- Fuel begins with environment temp-->
<default value="/consumables/fuel/tank[0]/temperature_degC"/>
<test value="propulsion/tat-c">
sim-time-sec le 30
</test>
<output>/consumables/fuel/tank[0]/temperature_degC</output>
</switch>
<summer name="Heat transfer via wing">
<input>/consumables/fuel/tank[0]/temperature_degC</input>
<input>systems/fuel/fcoc/conduction/environmental</input>
<output>/consumables/fuel/tank[0]/temperature_degC</output>
</summer>
<summer name="FCOC heating of fuel">
<input>/consumables/fuel/tank[0]/temperature_degC</input>
<input>systems/fuel/fcoc/conduction/left-engine</input>
<output>/consumables/fuel/tank[0]/temperature_degC</output>
</summer>
</channel>
<!-- EICAS indicators -->
<channel name="eicas alerts and units">
<switch name="unit in kg">
<default value="0"/>
<test value="1">
systems/fuel/eicas/unit-pounds == 0
</test>
<output>systems/fuel/eicas/unit-kg</output>
</switch>
<switch name="fuel 1 lo">
<default value="0"/>
<test value="1">
systems/fuel/eicas/left-fuel-qty-lbs le 880
</test>
<output>systems/fuel/eicas/alert/fuel-1-lo</output>
</switch>
<switch name="fuel 1 lo">
<default value="0"/>
<test value="1">
systems/fuel/eicas/right-fuel-qty-lbs le 880
</test>
<output>systems/fuel/eicas/alert/fuel-2-lo</output>
</switch>
<switch name="fuel 1 2 lo">
<default value="0"/>
<test value="1">
systems/fuel/eicas/alert/fuel-1-lo == 1
systems/fuel/eicas/alert/fuel-2-lo == 1
</test>
<output>systems/fuel/eicas/alert/fuel-1-2-lo</output>
</switch>
<switch name="AC pump 1 fail">
<default value="0"/>
<test value="1">
/controls/fuel/tank[6]/boost-pump[0] != systems/fuel/pump/left-powered
</test>
<output>systems/fuel/eicas/alert/pump-1-fail</output>
</switch>
<switch name="AC pump 2 fail">
<default value="0"/>
<test value="1">
/controls/fuel/tank[7]/boost-pump[0] != systems/fuel/pump/right-powered
</test>
<output>systems/fuel/eicas/alert/pump-2-fail</output>
</switch>
<switch name="AC pump 1 2 fail">
<default value="0"/>
<test value="1">
systems/fuel/eicas/alert/pump-1-fail == 1
systems/fuel/eicas/alert/pump-2-fail == 1
</test>
<output>systems/fuel/eicas/alert/pump-1-2-fail</output>
</switch>
<switch name="fuel imbalance">
<default value="0"/>
<test value="1">
systems/fuel/eicas/fuel-balance-delta gt 100
</test>
<output>systems/fuel/eicas/alert/fuel-imbalance</output>
</switch>
<switch name="xfeed open while imbalance">
<default value="0"/>
<test value="1">
systems/fuel/eicas/alert/fuel-imbalance == 1
systems/fuel/pump/xfeed-status == 1
</test>
<output>systems/fuel/eicas/alert/fuel-equal-xfeed-open</output>
</switch>
<switch name="freezing fuel">
<default value="0"/>
<test value="1">
systems/fuel/fcoc/fuel-temperature-degC le -48
</test>
<output>systems/fuel/eicas/alert/fuel-freezing</output>
</switch>
</channel>
<channel name="EICAS display">
<switch name="display fuel flow left Green"><!--Dash in amber if false -->
<default value="1"/>
<test logic="OR" value="0">
systems/fuel/eicas/left-ff-pph lt 10
systems/fuel/eicas/left-ff-pph gt 9990
</test>
<output>systems/fuel/eicas/display/ff-display-green-left</output>
</switch>
<switch name="display fuel flow right Green"><!--Dash in amber if false -->
<default value="1"/>
<test logic="OR" value="0">
systems/fuel/eicas/right-ff-pph lt 10
systems/fuel/eicas/right-ff-pph gt 9990
</test>
<output>systems/fuel/eicas/display/ff-display-green-right</output>
</switch>
<switch name="fuel quantity">
<default value="systems/fuel/eicas/fuel-qty-lbs"/>
<test value="systems/fuel/eicas/fuel-qty-kg">
systems/fuel/eicas/unit-kg == 1
</test>
<output>systems/fuel/eicas/display/qty</output>
</switch>
<switch name="fuel quantity left tank">
<default value="systems/fuel/eicas/left-fuel-qty-lbs"/>
<test value="systems/fuel/eicas/left-fuel-qty-kg">
systems/fuel/eicas/unit-kg == 1
</test>
<output>systems/fuel/eicas/display/qty-left</output>
</switch>
<switch name="fuel quantity right tank">
<default value="systems/fuel/eicas/right-fuel-qty-lbs"/>
<test value="systems/fuel/eicas/right-fuel-qty-kg">
systems/fuel/eicas/unit-kg == 1
</test>
<output>systems/fuel/eicas/display/qty-right</output>
</switch>
<switch name="fuel flow left tank">
<default value="systems/fuel/eicas/left-ff-pph"/>
<test value="systems/fuel/eicas/left-ff-kph">
systems/fuel/eicas/unit-kg == 1
</test>
<output>systems/fuel/eicas/display/ff-left</output>
</switch>
<switch name="fuel flow right tank">
<default value="systems/fuel/eicas/right-ff-pph"/>
<test value="systems/fuel/eicas/right-ff-kph">
systems/fuel/eicas/unit-kg == 1
</test>
<output>systems/fuel/eicas/display/ff-right</output>
</switch>
</channel>
</system>