<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 2015 onox
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
-->
<PropertyList>
<!-- ============================================================== -->
<!-- Read-Only Properties -->
<!-- ============================================================== -->
<logic>
<name>Engine Starter</name>
<input>
<and>
<less-than>
<property>/systems/electrical/outputs/starter</property>
<value>31.5</value>
</less-than>
<greater-than>
<property>/systems/electrical/outputs/starter</property>
<value>20.0</value>
</greater-than>
</and>
</input>
<output>
<property>/controls/engines/current-engine/starter</property>
</output>
</logic>
<filter>
<name>Engine RPM</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/rpm</property>
</input>
<input>
<property>/engines/engine[0]/rpm</property>
</input>
<output>
<property>/engines/active-engine/rpm</property>
</output>
</filter>
<logic>
<name>Engine Cranking</name>
<input>
<or>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
<property>/engines/engine[0]/cranking</property>
</and>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
<property>/engines/engine[1]/cranking</property>
</and>
</or>
</input>
<output>
<property>/engines/active-engine/cranking</property>
</output>
</logic>
<logic>
<name>Engine Running</name>
<input>
<or>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
<property>/engines/engine[0]/running</property>
</and>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
<property>/engines/engine[1]/running</property>
</and>
</or>
</input>
<output>
<property>/engines/active-engine/running</property>
</output>
</logic>
<logic>
<name>Engine Exhaust</name>
<input>
<and>
<property>/engines/active-engine/cranking</property>
<not>
<property>/engines/active-engine/running</property>
</not>
<greater-than>
<property>/engines/active-engine/rpm</property>
<value>0.0</value>
</greater-than>
<greater-than>
<property>/controls/engines/current-engine/mixture</property>
<value>0.0</value>
</greater-than>
</and>
</input>
<output>
<property>/engines/active-engine/exhaust</property>
</output>
</logic>
<logic>
<name>Engine Crashed</name>
<input>
<or>
<property>/engines/active-engine/crash-engine</property>
<!-- Nose gear broken or pontoons damaged or broken crashes engine -->
<property>/fdm/jsbsim/gear/unit[0]/broken</property>
<not-equals>
<property>/fdm/jsbsim/pontoon-damage/left-pontoon</property>
<value>0</value>
</not-equals>
<not-equals>
<property>/fdm/jsbsim/pontoon-damage/right-pontoon</property>
<value>0</value>
</not-equals>
</or>
</input>
<output>
<property>/engines/active-engine/crashed</property>
</output>
</logic>
<filter>
<name>Engine MP-OSI</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/mp-osi</property>
</input>
<input>
<property>/engines/engine[0]/mp-osi</property>
</input>
<output>
<property>/engines/active-engine/mp-osi</property>
</output>
</filter>
<filter>
<name>Engine Fuel Flow</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/fuel-flow-gph</property>
</input>
<input>
<property>/engines/engine[0]/fuel-flow-gph</property>
</input>
<output>
<property>/engines/active-engine/fuel-flow-gph</property>
</output>
</filter>
<filter>
<name>Engine EGT Temp</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/egt-degf</property>
</input>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/engines/engine[0]/egt-degf</property>
</input>
<output>
<property>/engines/active-engine/egt-degf</property>
</output>
</filter>
<filter>
<name>Engine EGT Norm</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/egt-norm</property>
</input>
<input>
<property>/engines/engine[0]/egt-norm</property>
</input>
<output>
<property>/engines/active-engine/egt-norm</property>
</output>
</filter>
<filter>
<name>Engine Oil Temperature</name>
<type>gain</type>
<gain>
<property>/engines/active-engine/low-oil-temperature-factor</property>
</gain>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/engines/engine[0]/oil-temperature-degf</property>
</input>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/oil-temperature-degf</property>
</input>
<output>
<property>/engines/active-engine/oil-temperature-degf</property>
</output>
</filter>
<filter>
<name>Engine Oil Pressure</name>
<type>gain</type>
<gain>
<property>/engines/active-engine/low-oil-pressure-factor</property>
</gain>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/engines/engine[1]/oil-pressure-psi</property>
</input>
<input>
<property>/engines/engine[0]/oil-pressure-psi</property>
</input>
<output>
<property>/engines/active-engine/oil-pressure-psi</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Magnetos -->
<!-- ============================================================== -->
<filter>
<name>Engine 160 HP Magnetos</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/controls/switches/magnetos</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/engines/engine[0]/magnetos</property>
</output>
</filter>
<filter>
<name>Engine 180 HP Magnetos</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/controls/switches/magnetos</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/engines/engine[1]/magnetos</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Starter -->
<!-- ============================================================== -->
<logic>
<name>Engine 160 HP Starter</name>
<input>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
<property>/controls/engines/current-engine/starter</property>
</and>
</input>
<output>
<property>/controls/engines/engine[0]/starter</property>
</output>
</logic>
<logic>
<name>Engine 180 HP Starter</name>
<input>
<and>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
<property>/controls/engines/current-engine/starter</property>
</and>
</input>
<output>
<property>/controls/engines/engine[1]/starter</property>
</output>
</logic>
<!-- ============================================================== -->
<!-- Throttle -->
<!-- ============================================================== -->
<filter>
<name>Engine 160 HP Throttle</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/controls/engines/current-engine/throttle</property>
</input>
<input>
<property>/controls/engines/engine[1]/throttle</property>
</input>
<output>
<property>/controls/engines/engine[0]/throttle</property>
</output>
</filter>
<filter>
<name>Engine 180 HP Throttle</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/controls/engines/current-engine/throttle</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/engines/engine[1]/throttle</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Mixture -->
<!-- ============================================================== -->
<filter>
<name>Engine 160 HP Mixture</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/controls/engines/current-engine/mixture</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/engines/engine[0]/mixture</property>
</output>
</filter>
<filter>
<name>Engine 180 HP Mixture</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/controls/engines/current-engine/mixture</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/engines/engine[1]/mixture</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Carburetor Heat -->
<!-- ============================================================== -->
<filter>
<name>Engine 160 HP Carb Heat</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>0</value>
</equals>
</condition>
<property>/controls/engines/current-engine/carb-heat</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/anti-ice/engine[0]/carb-heat</property>
</output>
</filter>
<filter>
<name>Engine 180 HP Carb Heat</name>
<type>gain</type>
<input>
<condition>
<equals>
<property>/controls/engines/active-engine</property>
<value>1</value>
</equals>
</condition>
<property>/controls/engines/current-engine/carb-heat</property>
</input>
<input>
<value>0.0</value>
</input>
<output>
<property>/controls/anti-ice/engine[1]/carb-heat</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Fuel contamination and low oil level -->
<!-- ============================================================== -->
<logic>
<name>Engine Killed</name>
<input>
<or>
<property>/engines/active-engine/crashed</property>
<property>/engines/active-engine/kill-engine</property>
<!-- engine is killed if fuel contamination is higher than 0.2 on a selected tank -->
<and>
<property>consumables/fuel/tank[0]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[0]/water-contamination</property>
<value>0.2</value>
</greater-than>
</and>
<and>
<property>consumables/fuel/tank[1]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[1]/water-contamination</property>
<value>0.2</value>
</greater-than>
</and>
<!-- engine is also killed if oil level is critical. Minimum oil level in the sump for safe operation (according
to Lycomings manual, page 3-10) is 2 quarts, which explains the value of 1.97 below-->
<less-than>
<property>/engines/active-engine/oil-level</property>
<value>1.97</value>
</less-than>
<!-- kill engine if the oil pressure is too low while the engine is running, according to Lycoming manaul 3-6 minimum oil pressure
in normal flight is 60psi, we use quite a bit below that to avoid excessive coughing during start. The engine will run for a while
probably at these low pressures, but if you have zero, you need to cut the engine fast! -->
<and>
<property>/engines/active-engine/running</property>
<equals>
<property>/engines/active-engine/ready-oil-press-checker</property>
<value>2</value>
</equals>
<less-than>
<property>/engines/active-engine/oil-pressure-psi</property>
<value>20</value> <!-- POH 2-3, our 172 has the Rochester gauge installed -->
</less-than>
</and>
<!-- also kill when pressure is too high (simulates pipes bursting under extreme pressure)-->
<and>
<property>/engines/active-engine/running</property>
<greater-than>
<property>/engines/active-engine/oil-pressure-psi</property>
<value>120</value> <!-- POH 2-5 -->
</greater-than>
</and>
<!-- engine is also killed if there is too much ice in the carburettor. Limit value is arbitrarily set to 0.32 -->
<greater-than-equals>
<property>/engines/active-engine/carb_ice</property>
<value>0.32</value>
</greater-than-equals>
</or>
</input>
<output>
<property>/engines/active-engine/killed</property>
</output>
</logic>
<!-- Low level of fuel contamination or just above oil minimal level makes engine cough-->
<logic>
<name>Engine Coughing</name>
<input>
<or>
<!-- engine coughs if fuel contamination is present on a selected tank, but lower than the critical value of 0.2 -->
<and>
<or>
<and>
<property>consumables/fuel/tank[0]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[0]/water-contamination</property>
<value>0.0</value>
</greater-than>
</and>
<and>
<property>consumables/fuel/tank[1]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[1]/water-contamination</property>
<value>0.0</value>
</greater-than>
</and>
</or>
<not>
<and>
<property>consumables/fuel/tank[0]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[0]/water-contamination</property>
<value>0.2</value>
</greater-than>
</and>
</not>
<not>
<and>
<property>consumables/fuel/tank[1]/selected</property>
<greater-than>
<property>/consumables/fuel/tank[1]/water-contamination</property>
<value>0.2</value>
</greater-than>
</and>
</not>
</and>
<!-- coughing due to low oil pressure -->
<and>
<property>/engines/active-engine/running</property>
<equals>
<property>/engines/active-engine/ready-oil-press-checker</property>
<value>2</value>
</equals>
<less-than>
<property>/engines/active-engine/oil-pressure-psi</property>
<value>22.5</value>
</less-than>
<greater-than>
<property>/engines/active-engine/oil-pressure-psi</property>
<value>20</value>
</greater-than>
</and>
<!-- engine also coughs if ice is present in the carburettor and is melting at a noticiable rate -->
<and>
<greater-than>
<property>/engines/active-engine/carb_ice</property>
<value>0.0</value>
</greater-than>
<less-than>
<property>/engines/active-engine/carb_icing_rate</property>
<value>-0.5</value>
</less-than>
<!-- leaning the mixture while the carb ice is melting helps with the cough in RL, which is why
the egt-norm property is used here -->
<greater-than>
<property>/engines/active-engine/egt-norm</property>
<value>0.5</value>
</greater-than>
</and>
</or>
</input>
<output>
<property>/engines/active-engine/coughing</property>
</output>
</logic>
<!-- ============================================================== -->
<!-- Carburetor Icing drops RPM -->
<!-- ============================================================== -->
<filter>
<name>Engine 160 HP Carb Icing Factor</name>
<type>gain</type>
<input>
<property>/engines/active-engine/volumetric-efficiency-factor</property>
</input>
<output>
<property>/fdm/jsbsim/propulsion/engine[0]/volumetric-efficiency</property>
</output>
</filter>
<filter>
<name>Engine 180 HP Carb Icing Factor</name>
<type>gain</type>
<input>
<property>/engines/active-engine/volumetric-efficiency-factor</property>
</input>
<output>
<property>/fdm/jsbsim/propulsion/engine[1]/volumetric-efficiency</property>
</output>
</filter>
<!-- ============================================================== -->
<!-- Complex engine procedures -->
<!-- ============================================================== -->
<logic>
<name>Complex engine procedures</name>
<input>
<property>/engines/active-engine/complex-engine-procedures</property>
</input>
<output>
<name>damage</name>
<property>/engines/active-engine/damage_allowed</property>
</output>
<output>
<name>oil</name>
<property>/engines/active-engine/oil_consumption_allowed</property>
</output>
<output>
<name>carb-icing</name>
<property>/engines/active-engine/carb_icing_allowed</property>
</output>
<output>
<name>fuel-contamination</name>
<property>/consumables/fuel/contamination_allowed</property>
</output>
</logic>
<!-- ============================================================== -->
<!-- Save state of aircraft between sessions -->
<!-- ============================================================== -->
<logic>
<name>Save state of aircraft between sessions</name>
<input>
<property>/sim/model/c172p/save-state</property>
</input>
<output>
<name>fuel</name>
<property>/consumables/fuel/save-fuel-state</property>
</output>
<output>
<name>battery</name>
<property>/systems/electrical/save-battery-charge</property>
</output>
<output>
<name>instruments</name>
<property>/instrumentation/save-switches-state</property>
</output>
</logic>
<!-- ============================================================== -->
<!-- Converting fuel from US gallons to litres -->
<!-- ============================================================== -->
<filter>
<name>Left Tank: US Gallons to Litres</name>
<type>gain</type>
<gain>3.785411784</gain>
<input>
<property>/consumables/fuel/tank[0]/level-gal_us</property>
</input>
<output>
<property>/consumables/fuel/tank[0]/level-litres</property>
</output>
</filter>
<filter>
<name>Right Tank: US Gallons to Litres</name>
<type>gain</type>
<gain>3.785411784</gain>
<input>
<property>/consumables/fuel/tank[1]/level-gal_us</property>
</input>
<output>
<property>/consumables/fuel/tank[1]/level-litres</property>
</output>
</filter>
</PropertyList>