561 lines
19 KiB
XML
561 lines
19 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright (c) 2015 onox
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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-->
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<system name="c172p heat">
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<property value="37.0">heat/human-body-temp-degc</property>
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<channel name="cabin-doors-windows">
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<aerosurface_scale name="heat/door-left">
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<input>/sim/model/door-positions/leftDoor/position-norm</input>
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<zero_centered>false</zero_centered>
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<domain>
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<min>0.5</min>
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<max>1.0</max>
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</domain>
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<range>
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<min>0.0</min>
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<max>1.0</max>
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</range>
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<clipto>
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<min>0.0</min>
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<max>1.0</max>
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</clipto>
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</aerosurface_scale>
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<aerosurface_scale name="heat/door-right">
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<input>/sim/model/door-positions/rightDoor/position-norm</input>
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<zero_centered>false</zero_centered>
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<domain>
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<min>0.5</min>
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<max>1.0</max>
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</domain>
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<range>
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<min>0.0</min>
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<max>1.0</max>
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</range>
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<clipto>
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<min>0.0</min>
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<max>1.0</max>
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</clipto>
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</aerosurface_scale>
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<aerosurface_scale name="heat/door-baggage">
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<input>/sim/model/door-positions/baggageDoor/position-norm</input>
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<zero_centered>false</zero_centered>
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<domain>
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<min>0.0</min>
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<max>1.0</max>
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</domain>
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<range>
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<min>0.0</min>
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<max>0.5</max>
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</range>
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<clipto>
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<min>0.0</min>
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<max>0.5</max>
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</clipto>
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</aerosurface_scale>
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<aerosurface_scale name="heat/window-left">
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<input>/sim/model/door-positions/leftWindow/position-norm</input>
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<zero_centered>false</zero_centered>
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<domain>
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<min>0.5</min>
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<max>1.0</max>
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</domain>
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<range>
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<min>0.0</min>
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<max>0.2</max>
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</range>
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<clipto>
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<min>0.0</min>
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<max>0.2</max>
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</clipto>
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</aerosurface_scale>
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<aerosurface_scale name="heat/window-right">
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<input>/sim/model/door-positions/rightWindow/position-norm</input>
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<zero_centered>false</zero_centered>
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<domain>
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<min>0.5</min>
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<max>1.0</max>
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</domain>
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<range>
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<min>0.0</min>
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<max>0.2</max>
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</range>
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<clipto>
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<min>0.0</min>
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<max>0.2</max>
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</clipto>
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</aerosurface_scale>
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<summer name="heat/doors-windows-left">
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<input>heat/door-left</input>
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<input>heat/window-left</input>
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<clipto>
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<min>0.0</min>
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<max>1.0</max>
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</clipto>
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</summer>
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<summer name="heat/doors-windows-right">
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<input>heat/door-right</input>
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<input>heat/window-right</input>
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<clipto>
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<min>0.0</min>
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<max>1.0</max>
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</clipto>
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</summer>
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<summer name="heat/doors-windows-total">
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<input>heat/doors-windows-left</input>
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<input>heat/doors-windows-right</input>
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<input>heat/door-baggage</input>
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</summer>
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<summer name="heat/humans-count">
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<input>/pax/pilot/present</input>
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<input>/pax/co-pilot/present</input>
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<input>/pax/left-passenger/present</input>
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<input>/pax/right-passenger/present</input>
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</summer>
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</channel>
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<channel name="cabin-temperature">
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<!-- The exhaust gas temperature controls how much the air is
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heated up.
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-->
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<pure_gain name="heat/heat-exhaust-gas-temp-degc">
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<input>/engines/active-engine/egt-norm</input>
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<!-- Extra heat (in Celsius) when EGT is at maximum. EGT is
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usually between 0.4 and 0.6.
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-->
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<gain>60.0</gain>
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</pure_gain>
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<!-- Computes the difference in temperature between the cabin
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heat intake (behind propeller) and the cabin.
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-->
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<summer name="heat/cabin-heat-temp-diff">
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<input>/environment/temperature-degc</input>
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<input>-heat/cabin-air-temp-degc</input>
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<input>heat/heat-exhaust-gas-temp-degc</input>
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</summer>
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<!-- Computes the difference in temperature between the cabin
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air intake (ventilating air door on the right side of the
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fuselage) and the cabin.
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-->
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<summer name="heat/cabin-air-temp-diff">
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<input>/environment/temperature-degc</input>
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<input>-heat/cabin-air-temp-degc</input>
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</summer>
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<summer name="heat/cabin-human-temp-diff">
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<input>heat/human-body-temp-degc</input>
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<input>-heat/cabin-air-temp-degc</input>
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<clipto>
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<min>-0.01</min>
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<max> 0.10</max>
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</clipto>
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</summer>
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<scheduled_gain name="heat/cabin-air-transfer-heat-duct">
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<input>heat/cabin-heat-temp-diff</input>
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<gain>/environment/aircraft-effects/cabin-heat-set</gain>
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<table>
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<independentVar lookup="row">/engines/active-engine/rpm</independentVar>
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<independentVar lookup="column">/velocities/airspeed-kt</independentVar>
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<tableData>
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40 120
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0 0.10 0.50
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700 0.25 0.60
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2800 0.50 1.00
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</tableData>
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</table>
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</scheduled_gain>
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<scheduled_gain name="heat/cabin-air-transfer-air-duct">
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<input>heat/cabin-air-temp-diff</input>
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<gain>/environment/aircraft-effects/cabin-air-set</gain>
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<table>
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<independentVar lookup="row">/engines/active-engine/rpm</independentVar>
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<independentVar lookup="column">/velocities/airspeed-kt</independentVar>
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<tableData>
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40 120
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0 0.10 0.50
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700 0.25 0.60
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2800 0.50 1.00
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</tableData>
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</table>
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</scheduled_gain>
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<!-- Even with the air slider closed, there is still some small
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amount of heat transferred via the fuselage.
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-->
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<summer name="heat/cabin-air-transfer-fuselage">
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<input>/environment/temperature-degc</input>
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<input>-heat/cabin-air-temp-degc</input>
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<clipto>
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<min>-0.1</min>
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<max> 0.1</max>
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</clipto>
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</summer>
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<scheduled_gain name="heat/cabin-air-transfer-overhead-vent-left">
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<input>heat/cabin-air-temp-diff</input>
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<gain>/controls/climate-control/overhead-vent-front-left</gain>
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<table>
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<independentVar>/velocities/airspeed-kt</independentVar>
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<tableData>
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40 0.10
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120 0.50
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</tableData>
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</table>
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</scheduled_gain>
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<scheduled_gain name="heat/cabin-air-transfer-overhead-vent-right">
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<input>heat/cabin-air-temp-diff</input>
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<gain>/controls/climate-control/overhead-vent-front-right</gain>
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<table>
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<independentVar>/velocities/airspeed-kt</independentVar>
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<tableData>
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40 0.10
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120 0.50
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</tableData>
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</table>
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</scheduled_gain>
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<pure_gain name="heat/cabin-air-transfer-doors-windows">
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<input>heat/cabin-air-temp-diff</input>
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<gain>heat/doors-windows-total</gain>
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</pure_gain>
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<pure_gain name="heat/cabin-air-transfer-humans">
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<input>heat/cabin-human-temp-diff</input>
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<gain>heat/humans-count</gain>
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</pure_gain>
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<summer name="heat/cabin-air-transfer-total">
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<input>heat/cabin-air-transfer-heat-duct</input>
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<input>heat/cabin-air-transfer-air-duct</input>
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<input>heat/cabin-air-transfer-fuselage</input>
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<input>heat/cabin-air-transfer-overhead-vent-left</input>
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<input>heat/cabin-air-transfer-overhead-vent-right</input>
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<input>heat/cabin-air-transfer-doors-windows</input>
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<input>heat/cabin-air-transfer-humans</input>
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</summer>
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<integrator name="heat/cabin-air-temp-degc">
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<input>heat/cabin-air-transfer-total</input>
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<!-- This is the constant that actually controls how fast
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(or slow) the cabin temperature changes.
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-->
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<c1>0.030</c1>
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</integrator>
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</channel>
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<channel name="surface-temperature">
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<summer name="heat/surface-cabin-heat-transfer">
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<input>heat/cabin-air-temp-degc</input>
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<input>-heat/surface-temp-degc</input>
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<!-- If the pilot opens the air slider, the cabin air temp might
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start increasing or decreasing fast. Clip the difference to
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limit this effect.
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-->
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<clipto>
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<min>-5.0</min>
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<max> 5.0</max>
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</clipto>
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</summer>
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<integrator name="heat/surface-temp-degc">
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<input>heat/surface-cabin-heat-transfer</input>
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<!-- This is the constant that actually controls how fast
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(or slow) the surface temperature changes.
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-->
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<c1>0.020</c1>
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</integrator>
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</channel>
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<channel name="cabin-dewpoint">
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<fcs_function name="heat/non-humans-airflow">
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<function>
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<quotient>
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<sum>
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<abs>
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<property>heat/cabin-air-transfer-air-duct</property>
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</abs>
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<abs>
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<product>
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<quotient>
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<property>heat/cabin-air-transfer-heat-duct</property>
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<property>heat/cabin-heat-temp-diff</property>
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</quotient>
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<property>heat/cabin-air-temp-diff</property>
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</product>
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</abs>
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<abs>
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<property>heat/cabin-air-transfer-doors-windows</property>
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</abs>
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<abs>
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<property>heat/cabin-air-transfer-overhead-vent-left</property>
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</abs>
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<abs>
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<property>heat/cabin-air-transfer-overhead-vent-right</property>
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</abs>
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</sum>
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<abs>
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<property>heat/cabin-air-temp-diff</property>
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</abs>
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</quotient>
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</function>
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</fcs_function>
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<pure_gain name="heat/humans-airflow">
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<input>heat/humans-count</input>
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<gain>0.1</gain>
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</pure_gain>
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<fcs_function name="heat/future-cabin-rel-humidity">
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<function>
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<sum>
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<quotient>
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<sum>
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<product>
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<property>heat/non-humans-airflow</property>
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<property>/environment/relative-humidity</property>
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</product>
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<product>
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<property>heat/humans-airflow</property>
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<!-- Human breath: 35 C with 95 % RH -->
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<value>95.0</value>
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</product>
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</sum>
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<sum>
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<property>heat/non-humans-airflow</property>
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<property>heat/humans-airflow</property>
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</sum>
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</quotient>
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</sum>
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</function>
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</fcs_function>
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<summer name="heat/cabin-rel-humidity-diff">
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<input>heat/future-cabin-rel-humidity</input>
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||
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|
<input>-heat/cabin-relative-humidity</input>
|
||
|
|
|
||
|
|
<clipto>
|
||
|
|
<min>-10.0</min>
|
||
|
|
<max> 10.0</max>
|
||
|
|
</clipto>
|
||
|
|
</summer>
|
||
|
|
|
||
|
|
<integrator name="heat/cabin-relative-humidity">
|
||
|
|
<input>heat/cabin-rel-humidity-diff</input>
|
||
|
|
|
||
|
|
<!-- This is the constant that actually controls how fast
|
||
|
|
(or slow) the cabin relative humidity changes.
|
||
|
|
-->
|
||
|
|
<c1>0.015</c1>
|
||
|
|
|
||
|
|
<!-- Keep relative humidity above zero to prevent
|
||
|
|
math domain error (which happens in ln(x) for x = 0).
|
||
|
|
-->
|
||
|
|
<clipto>
|
||
|
|
<min> 0.1</min>
|
||
|
|
<max>100.0</max>
|
||
|
|
</clipto>
|
||
|
|
</integrator>
|
||
|
|
|
||
|
|
<!-- Computing the dewpoint using the Arden Buck equation:
|
||
|
|
|
||
|
|
y_m(T, RH) = ln(RH/100 * exp((b - T/d) * (T/(c+T)))
|
||
|
|
|
||
|
|
using the following constants:
|
||
|
|
|
||
|
|
b = 17.67; c = 243.5 celsius; d = 234.5 celsius
|
||
|
|
|
||
|
|
from:
|
||
|
|
|
||
|
|
Bolton, D. (1980). The computation of equivalent potential
|
||
|
|
temperature. Monthly weather review, 108(7), 1046-1053.
|
||
|
|
-->
|
||
|
|
<fcs_function name="heat/cabin-dewpoint-ym">
|
||
|
|
<function>
|
||
|
|
<ln>
|
||
|
|
<product>
|
||
|
|
<quotient>
|
||
|
|
<property>heat/cabin-relative-humidity</property>
|
||
|
|
<value>100.0</value>
|
||
|
|
</quotient>
|
||
|
|
<exp>
|
||
|
|
<product>
|
||
|
|
<difference>
|
||
|
|
<value>17.67</value>
|
||
|
|
<quotient>
|
||
|
|
<property>heat/cabin-air-temp-degc</property>
|
||
|
|
<value>234.5</value>
|
||
|
|
</quotient>
|
||
|
|
</difference>
|
||
|
|
<quotient>
|
||
|
|
<property>heat/cabin-air-temp-degc</property>
|
||
|
|
<sum>
|
||
|
|
<value>243.5</value>
|
||
|
|
<property>heat/cabin-air-temp-degc</property>
|
||
|
|
</sum>
|
||
|
|
</quotient>
|
||
|
|
</product>
|
||
|
|
</exp>
|
||
|
|
</product>
|
||
|
|
</ln>
|
||
|
|
</function>
|
||
|
|
</fcs_function>
|
||
|
|
|
||
|
|
<!-- Computing dewpoint using the Arden Buck equation using constants
|
||
|
|
that give a maximum error of 0.1 % for -30.0 <= T <= +35.0.
|
||
|
|
|
||
|
|
Reference: https://en.wikipedia.org/wiki/Dew_point#Calculating_the_dew_point
|
||
|
|
-->
|
||
|
|
<fcs_function name="heat/cabin-dewpoint-degc">
|
||
|
|
<function>
|
||
|
|
<quotient>
|
||
|
|
<product>
|
||
|
|
<value>243.5</value>
|
||
|
|
<property>heat/cabin-dewpoint-ym</property>
|
||
|
|
</product>
|
||
|
|
<difference>
|
||
|
|
<value>17.67</value>
|
||
|
|
<property>heat/cabin-dewpoint-ym</property>
|
||
|
|
</difference>
|
||
|
|
</quotient>
|
||
|
|
</function>
|
||
|
|
</fcs_function>
|
||
|
|
|
||
|
|
<!-- Normalized human perception of dew point:
|
||
|
|
|
||
|
|
0.0 is dry; 0.1 - 0.5 is comfortable; 0.7 is somewhat uncomfortable;
|
||
|
|
0.8 - 0.9 is very uncomfortable; 1.0 is extremely high.
|
||
|
|
|
||
|
|
Reference: https://en.wikipedia.org/wiki/Dew_point#Relationship_to_human_comfort
|
||
|
|
-->
|
||
|
|
<fcs_function name="heat/cabin-dewpoint-perception-norm">
|
||
|
|
<function>
|
||
|
|
<table>
|
||
|
|
<independentVar>heat/cabin-dewpoint-degc</independentVar>
|
||
|
|
<tableData>
|
||
|
|
10 0.0
|
||
|
|
13 0.3
|
||
|
|
16 0.5
|
||
|
|
18 0.7
|
||
|
|
21 0.8
|
||
|
|
24 0.9
|
||
|
|
26 1.0
|
||
|
|
</tableData>
|
||
|
|
</table>
|
||
|
|
</function>
|
||
|
|
</fcs_function>
|
||
|
|
|
||
|
|
</channel>
|
||
|
|
|
||
|
|
<channel name="fog-and-frost">
|
||
|
|
|
||
|
|
<summer name="heat/surface-dewpoint-diff">
|
||
|
|
<input>heat/cabin-dewpoint-degc</input>
|
||
|
|
<input>-heat/surface-temp-degc</input>
|
||
|
|
|
||
|
|
<!-- Small maximum to slowdown increase and decrease of fog
|
||
|
|
and frost.
|
||
|
|
-->
|
||
|
|
<clipto>
|
||
|
|
<min>-0.5</min>
|
||
|
|
<max> 0.5</max>
|
||
|
|
</clipto>
|
||
|
|
</summer>
|
||
|
|
|
||
|
|
<switch name="heat/moisture-windup-trigger">
|
||
|
|
<default value="0"/>
|
||
|
|
|
||
|
|
<test logic="AND" value="1">
|
||
|
|
heat/surface-dewpoint-diff GT 0
|
||
|
|
heat/moisture-norm GE 1
|
||
|
|
</test>
|
||
|
|
|
||
|
|
<test logic="AND" value="1">
|
||
|
|
heat/surface-dewpoint-diff LT 0
|
||
|
|
heat/moisture-norm LE 0
|
||
|
|
</test>
|
||
|
|
</switch>
|
||
|
|
|
||
|
|
<integrator name="heat/moisture-norm">
|
||
|
|
<input>heat/surface-dewpoint-diff</input>
|
||
|
|
<trigger>heat/moisture-windup-trigger</trigger>
|
||
|
|
|
||
|
|
<!-- This is the constant that actually controls how fast
|
||
|
|
(or slow) the moisture changes.
|
||
|
|
-->
|
||
|
|
<c1>0.010</c1>
|
||
|
|
|
||
|
|
<clipto>
|
||
|
|
<min>0.0</min>
|
||
|
|
<max>1.0</max>
|
||
|
|
</clipto>
|
||
|
|
</integrator>
|
||
|
|
|
||
|
|
<pure_gain name="heat/moisture-fog-level">
|
||
|
|
<input>heat/moisture-norm</input>
|
||
|
|
<gain>1.0</gain>
|
||
|
|
</pure_gain>
|
||
|
|
|
||
|
|
<pure_gain name="heat/moisture-frost-level">
|
||
|
|
<input>heat/moisture-norm</input>
|
||
|
|
<gain>3.0</gain>
|
||
|
|
</pure_gain>
|
||
|
|
|
||
|
|
<switch name="heat/fog-level">
|
||
|
|
<default value="heat/moisture-fog-level"/>
|
||
|
|
<test logic="AND" value="0">
|
||
|
|
heat/cabin-air-temp-degc LE 0
|
||
|
|
</test>
|
||
|
|
</switch>
|
||
|
|
|
||
|
|
<switch name="heat/frost-level">
|
||
|
|
<default value="heat/moisture-frost-level"/>
|
||
|
|
<test logic="AND" value="0">
|
||
|
|
heat/cabin-air-temp-degc GT 0
|
||
|
|
</test>
|
||
|
|
</switch>
|
||
|
|
|
||
|
|
</channel>
|
||
|
|
|
||
|
|
</system>
|