738.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://jsbsim.sourceforge.net/JSBSim.xsl"?>
<fdm_config name="737" release="BETA" version="2.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://jsbsim.sourceforge.net/JSBSim.xsd">
    
    <fileheader>
        <author> Dave Culp </author>
        <author> Aeromatic </author>
        <filecreationdate> 2006-01-04 </filecreationdate>
        <version>$Revison: 1.0 $</version>
        <description> Models a 737. </description>
    </fileheader>

    <metrics>
        <wingarea unit="FT2"> 1171.00 </wingarea>
        <wingspan unit="FT">    94.70 </wingspan>
        <chord unit="FT">       12.31 </chord>
        <htailarea unit="FT2"> 348.00 </htailarea>
        <htailarm unit="FT">    48.04 </htailarm>
        <vtailarea unit="FT2"> 297.00 </vtailarea>
        <vtailarm unit="FT">    44.50 </vtailarm>
        <location name="AERORP" unit="IN">
            <x> 625 </x>
            <y>   0 </y>
            <z>  24 </z>
        </location>
        <location name="EYEPOINT" unit="IN">
            <x>  80 </x>
            <y> -30 </y>
            <z>  70 </z>
        </location>
        <location name="VRP" unit="IN">
            <x> 0 </x>
            <y> 0 </y>
            <z> 0 </z>
        </location>
    </metrics>

    <mass_balance>
        <ixx unit="SLUG*FT2">    562000 </ixx>
        <iyy unit="SLUG*FT2"> 1.473e+06 </iyy>
        <izz unit="SLUG*FT2"> 1.894e+06 </izz>
        <ixy unit="SLUG*FT2">         0 </ixy>
        <ixz unit="SLUG*FT2">      8000 </ixz>
        <iyz unit="SLUG*FT2">         0 </iyz>
        <emptywt unit="LBS">      83000 </emptywt>
        <location name="CG" unit="IN">
            <x> 639 </x>
            <y>   0 </y>
            <z> -40 </z>
        </location>
    </mass_balance>

    <ground_reactions>
        <contact name="Nose Gear" type="BOGEY">
            <location unit="IN">
                <x> 158 </x>
                <y>   0 </y>
                <z> -84 </z>
            </location>
            <static_friction>  0.80 </static_friction>
            <dynamic_friction> 0.50 </dynamic_friction>
            <rolling_friction> 0.02 </rolling_friction>
            <spring_coeff unit="LBS/FT"> 90000 </spring_coeff>
            <damping_coeff unit="LBS/FT/SEC"> 4000 </damping_coeff>
            <damping_coeff_rebound unit="LBS/FT/SEC">8000</damping_coeff_rebound>
            <relaxation_velocity>
              <rolling unit="FT/SEC">0.7</rolling>
              <side unit="FT/SEC">0.7</side>
            </relaxation_velocity>
            <force_lag_filter>
              <rolling> 120.0 </rolling>
              <side>120.0 </side>
            </force_lag_filter>
            <wheel_slip_filter> 120.0 </wheel_slip_filter>
            <max_steer unit="DEG"> 35 </max_steer>
            <brake_group> NONE </brake_group>
            <retractable>1</retractable>
        </contact>
        <contact name="Left Main Gear" type="BOGEY">
            <location unit="IN">
                <x>  648 </x>
                <y> -100 </y>
                <z>  -84 </z>
            </location>
            <static_friction>  0.80 </static_friction>
            <dynamic_friction> 0.50 </dynamic_friction>
            <rolling_friction> 0.02 </rolling_friction>
            <spring_coeff unit="LBS/FT"> 60000 </spring_coeff>
            <damping_coeff unit="LBS/FT/SEC"> 10000 </damping_coeff>
            <damping_coeff_rebound unit="LBS/FT/SEC">10000</damping_coeff_rebound>
            <relaxation_velocity>
              <rolling unit="FT/SEC">0.7</rolling>
              <side unit="FT/SEC">0.7</side>
            </relaxation_velocity>
            <force_lag_filter>
              <rolling> 120.0 </rolling>
              <side> 120.0 </side>
            </force_lag_filter>
            <wheel_slip_filter> 120.0 </wheel_slip_filter>
            <max_steer unit="DEG"> 0.0 </max_steer>
            <brake_group> LEFT </brake_group>
            <retractable>1</retractable>
        </contact>
        <contact name="Right Main Gear" type="BOGEY">
            <location unit="IN">
                <x> 648 </x>
                <y> 100 </y>
                <z> -84 </z>
            </location>
            <static_friction>  0.80 </static_friction>
            <dynamic_friction> 0.50 </dynamic_friction>
            <rolling_friction> 0.02 </rolling_friction>
            <spring_coeff unit="LBS/FT"> 60000 </spring_coeff>
            <damping_coeff unit="LBS/FT/SEC"> 10000 </damping_coeff>
            <damping_coeff_rebound unit="LBS/FT/SEC">10000</damping_coeff_rebound>
            <relaxation_velocity>
              <rolling unit="FT/SEC">0.7</rolling>
              <side unit="FT/SEC">0.7</side>
            </relaxation_velocity>
            <force_lag_filter>
              <rolling> 120.0 </rolling>
              <side> 120.0 </side>
            </force_lag_filter>
            <wheel_slip_filter> 120.0 </wheel_slip_filter>
            <max_steer unit="DEG"> 0.0 </max_steer>
            <brake_group> RIGHT </brake_group>
            <retractable>1</retractable>
        </contact>
    </ground_reactions>
    <propulsion>
        <engine file="CFM56">
            <location unit="IN">
                <x>  540 </x>
                <y> -193 </y>
                <z>  -40 </z>
            </location>
            <orient unit="DEG">
                <roll>  0 </roll>
                <pitch> 0 </pitch>
                <yaw>   0 </yaw>
            </orient>
            <feed>0</feed>
            <feed>2</feed>
            <thruster file="direct">
                <location unit="IN">
                    <x>  540 </x>
                    <y> -193 </y>
                    <z>  -40 </z>
                </location>
                <orient unit="DEG">
                    <roll>  0 </roll>
                    <pitch> 0 </pitch>
                    <yaw>   0 </yaw>
                </orient>
            </thruster>
        </engine>
        <engine file="CFM56">
            <location unit="IN">
                <x> 540 </x>
                <y> 193 </y>
                <z> -40 </z>
            </location>
            <orient unit="DEG">
                <roll>  0 </roll>
                <pitch> 0 </pitch>
                <yaw>   0 </yaw>
            </orient>
            <feed>1</feed>
            <feed>2</feed>
            <thruster file="direct">
                <location unit="IN">
                    <x> 540 </x>
                    <y> 193 </y>
                    <z> -40 </z>
                </location>
                <orient unit="DEG">
                    <roll>  0 </roll>
                    <pitch> 0 </pitch>
                    <yaw>   0 </yaw>
                </orient>
            </thruster>
        </engine>
        <tank type="FUEL"><!-- Left wing tank -->
            <location unit="IN">
                <x> 520 </x>
                <y> -80 </y>
                <z> -18 </z>
            </location>
            <capacity unit="LBS"> 10200 </capacity>
            <contents unit="LBS"> 10000 </contents>
            <temperature> 59.0 </temperature> <!-- Fuel temp in degrees F -->
        </tank>
        <tank type="FUEL"><!-- Right wing tank -->
            <location unit="IN">
                <x> 520 </x>
                <y>  80 </y>
                <z> -18 </z>
            </location>
            <capacity unit="LBS"> 10200 </capacity>
            <contents unit="LBS"> 10000 </contents>
        </tank>
        <tank type="FUEL"><!-- Center tank -->
            <location unit="IN">
                <x> 480 </x>
                <y>   0 </y>
                <z> -18 </z>
            </location>
            <capacity unit="LBS"> 15000 </capacity>
            <contents unit="LBS">  4000 </contents>
        </tank>
    </propulsion>

     <system file="pushback"/>


    <flight_control name="FCS: 737">

        <channel name="Pitch">

            <summer name="Pitch Trim Sum">
                <input>fcs/elevator-cmd-norm</input>
                <input>fcs/pitch-trim-cmd-norm</input>
                <clipto>
                    <min>-1</min>
                    <max> 1</max>
                </clipto>
            </summer>

            <aerosurface_scale name="Elevator Control">
                <input>fcs/pitch-trim-sum</input>
                <range>
                    <min>-0.3</min>
                    <max> 0.3</max>
                </range>
                <output>fcs/elevator-pos-rad</output>
            </aerosurface_scale>

            <aerosurface_scale name="Elevator Normalized">
                <input>fcs/elevator-pos-rad</input>
                <domain>
                    <min>-0.3</min>
                    <max> 0.3</max>
                </domain>
                <range>
                    <min>-1</min>
                    <max> 1</max>
                </range>
                <output>fcs/elevator-pos-norm</output>
            </aerosurface_scale>

        </channel>
        <channel name="Roll">

            <summer name="Roll Trim Sum">
                <input>fcs/aileron-cmd-norm</input>
                <input>fcs/roll-trim-cmd-norm</input>
                <clipto>
                    <min>-1</min>
                    <max> 1</max>
                </clipto>
            </summer>

            <aerosurface_scale name="Left Aileron Control">
                <input>fcs/roll-trim-sum</input>
                <range>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </range>
                <output>fcs/left-aileron-pos-rad</output>
            </aerosurface_scale>

            <aerosurface_scale name="Right Aileron Control">
                <input>-fcs/roll-trim-sum</input>
                <range>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </range>
                <output>fcs/right-aileron-pos-rad</output>
            </aerosurface_scale>

            <aerosurface_scale name="Left aileron Normalized">
                <input>fcs/left-aileron-pos-rad</input>
                <domain>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </domain>
                <range>
                    <min>-1</min>
                    <max> 1</max>
                </range>
                <output>fcs/left-aileron-pos-norm</output>
            </aerosurface_scale>

            <aerosurface_scale name="Right aileron Normalized">
                <input>fcs/right-aileron-pos-rad</input>
                <domain>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </domain>
                <range>
                    <min>-1</min>
                    <max> 1</max>
                </range>
                <output>fcs/right-aileron-pos-norm</output>
            </aerosurface_scale>

        </channel>
        <channel name="Yaw">

            <summer name="Rudder Command Sum">
                <input>fcs/rudder-cmd-norm</input>
                <input>fcs/yaw-trim-cmd-norm</input>
                <clipto>
                    <min>-1</min>
                    <max> 1</max>
                </clipto>
            </summer>

            <scheduled_gain name="Yaw Damper">
                <input>velocities/r-aero-rad_sec</input>
                <table>
                  <independentVar>velocities/mach</independentVar>
                    <tableData>
                        0.00	0.0
                        0.10	0.0
                        0.11	1.0
                    </tableData>
                </table>
            </scheduled_gain>

            <scheduled_gain name="Yaw Damper Final">
                <input>fcs/yaw-damper</input>
                <table>
                  <independentVar>velocities/mach</independentVar>
                    <tableData>
                        0.00	0.0
                        0.10	0.0
                        0.11	1.0
                    </tableData>
                </table>
            </scheduled_gain>

            <summer name="Rudder Sum">
                <input>fcs/rudder-command-sum</input>
                <input>fcs/yaw-damper-final</input>
                <clipto>
                    <min>-1</min>
                    <max> 1</max>
                </clipto>
            </summer>

            <aerosurface_scale name="Rudder Control">
                <input>fcs/rudder-sum</input>
                <range>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </range>
                <output>fcs/rudder-pos-rad</output>
            </aerosurface_scale>

            <aerosurface_scale name="Rudder Normalized">
                <input>fcs/rudder-pos-rad</input>
                <domain>
                    <min>-0.35</min>
                    <max> 0.35</max>
                </domain>
                <range>
                    <min>-1</min>
                    <max> 1</max>
                </range>
                <output>fcs/rudder-pos-norm</output>
            </aerosurface_scale>

        </channel>
        <channel name="Flaps">

            <kinematic name="Flaps Control">
                <input>fcs/flap-cmd-norm</input>
                <traverse>
                    <setting>
                        <position>0</position>
                        <time>0</time>
                    </setting>
                    <setting>
                        <position>0.125</position>
                        <time>5</time>
                    </setting>
                    <setting>
                        <position>0.25</position>
                        <time>4</time>
                    </setting>
                    <setting>
                        <position>0.375</position>
                        <time>3</time>
                    </setting>
                    <setting>
                        <position>0.5</position>
                        <time>2</time>
                    </setting>
                    <setting>
                        <position>0.625</position>
                        <time>2</time>
                    </setting>
                    <setting>
                        <position>0.75</position>
                        <time>2</time>
                    </setting>
                    <setting>
                        <position>0.875</position>
                        <time>2</time>
                    </setting>
                    <setting>
                        <position>1</position>
                        <time>2</time>
                    </setting>
                </traverse>
                <output>fcs/flap-pos-norm</output>
            </kinematic>

        </channel>
        <channel name="Landing Gear">

            <kinematic name="Gear Control">
                <input>gear/gear-cmd-norm</input>
                <traverse>
                    <setting>
                        <position>0</position>
                        <time>0</time>
                    </setting>
                    <setting>
                        <position>1</position>
                        <time>5</time>
                    </setting>
                </traverse>
                <output>gear/gear-pos-norm</output>
            </kinematic>

        </channel>
        <channel name="Flight Spoilers">
          <!-- operated by the speedbrake handle and roll control -->
            <kinematic name="Flight Spoilers Control">
                <input>fcs/speedbrake-cmd-norm</input>
                <traverse>
                    <setting>
                        <position>0</position>
                        <time>0</time>
                    </setting>
                    <setting>
                        <position>1</position>
                        <time>0.6</time>
                    </setting>
                </traverse>
                <output>fcs/speedbrake-pos-norm</output>
            </kinematic>

        </channel>
        <channel name="Ground Spoilers">
          <!-- these only operate on the ground -->
            <kinematic name="Ground Spoilers Control">
                <input>fcs/spoiler-cmd-norm</input>
                <traverse>
                    <setting>
                        <position>0</position>
                        <time>0</time>
                    </setting>
                    <setting>
                        <position>1</position>
                        <time>0.6</time>
                    </setting>
                </traverse>
                <output>fcs/spoiler-pos-norm</output>
            </kinematic>

        </channel>

    </flight_control>

    <aerodynamics>

        <function name="aero/function/kCDge">
            <description>Change_in_drag_due_to_ground_effect</description>
            <product>
                  <table>
                      <independentVar>aero/h_b-mac-ft</independentVar>
                      <tableData>
                          0.0000	0.0480
                          0.1000	0.5150
                          0.1500	0.6290
                          0.2000	0.7090
                          0.3000	0.8150
                          0.4000	0.8820
                          0.5000	0.9280
                          0.6000	0.9620
                          0.7000	0.9880
                          0.8000	1.0000
                      </tableData>
                  </table>
            </product>
        </function>

        <function name="aero/function/kCLge">
            <description>Change_in_lift_due_to_ground_effect</description>
            <product>
                  <table>
                      <independentVar>aero/h_b-mac-ft</independentVar>
                      <tableData>
                          0.0000	1.2030
                          0.1000	1.1270
                          0.1500	1.0900
                          0.2000	1.0730
                          0.3000	1.0460
                          0.4000	1.0550
                          0.5000	1.0190
                          0.6000	1.0130
                          0.7000	1.0080
                          0.8000	1.0060
                          0.9000	1.0030
                          1.0000	1.0020
                          1.1000	1.0000
                      </tableData>
                  </table>
            </product>
        </function>

        <function name="aero/function/kCLsb">
            <description>Change_in_lift_due_to_speed_brake</description>
            <product>
                  <table>
                      <independentVar>fcs/speedbrake-pos-norm</independentVar>
                      <tableData>
                          0.0000	1.0
                          0.1000	0.85
                      </tableData>
                  </table>
            </product>
        </function>

        <function name="aero/function/kCLsp">
            <description>Change_in_lift_due_to_spoilers</description>
            <product>
                  <table>
                      <independentVar>fcs/spoiler-pos-norm</independentVar>
                      <tableData>
                          0.0000	1.0
                          0.1000	0.6
                      </tableData>
                  </table>
            </product>
        </function>

        <axis name="DRAG">

            <function name="aero/coefficient/CD0">
                <description>Drag_at_zero_lift</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                      <table>
                          <independentVar>aero/alpha-rad</independentVar>
                          <tableData>
                             -1.57	1.5000
                             -0.26	0.0420
                              0.00	0.0210
                              0.26	0.0420
                              1.57	1.5000
                          </tableData>
                      </table>
                </product>
            </function>

            <function name="aero/coefficient/CDi">
                <description>Induced_drag</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>aero/cl-squared</property>
                    <property>aero/function/kCDge</property>
                    <value>0.043</value>
                </product>
            </function>

            <function name="aero/coefficient/CDmach">
                <description>Drag_due_to_mach</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                      <table>
                          <independentVar>velocities/mach</independentVar>
                          <tableData>
                              0.00	0.0000
                              0.79	0.0000
                              1.10	0.0230
                              1.80	0.0150
                          </tableData>
                      </table>
                </product>
            </function>

            <function name="aero/coefficient/CDflap">
                <description>Drag_due_to_flaps</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/flap-pos-norm</property>
                    <value>0.059</value>
                </product>
            </function>

            <function name="aero/coefficient/CDgear">
                <description>Drag_due_to_gear</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>gear/gear-pos-norm</property>
                    <value>0.015</value>
                </product>
            </function>

            <function name="aero/coefficient/CDsb">
                <description>Drag_due_to_flight_spoilers</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/speedbrake-pos-norm</property>
                    <value>0.02</value>
                </product>
            </function>

            <function name="aero/coefficient/CDsp">
                <description>Drag_due_to_ground_spoilers</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/spoiler-pos-norm</property>
                    <value>0.04</value>
                </product>
            </function>

            <function name="aero/coefficient/CDbeta">
                <description>Drag_due_to_sideslip</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                      <table>
                          <independentVar>aero/beta-rad</independentVar>
                          <tableData>
                             -1.57	1.2300
                             -0.26	0.0500
                              0.00	0.0000
                              0.26	0.0500
                              1.57	1.2300
                          </tableData>
                      </table>
                </product>
            </function>

            <function name="aero/coefficient/CDde">
                <description>Drag_due_to_Elevator_Deflection</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/elevator-pos-norm</property>
                    <value>0.059</value>
                </product>
            </function>

        </axis>

        <axis name="SIDE">
            <function name="aero/coefficient/CYb">
                <description>Side_force_due_to_beta</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>aero/beta-rad</property>
                    <value>-1</value>
                </product>
            </function>
        </axis>

        <axis name="LIFT">

            <function name="aero/coefficient/CLalpha">
                <description>Lift_due_to_alpha</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>aero/function/kCLge</property>
                    <property>aero/function/kCLsb</property>
                    <property>aero/function/kCLsp</property>
                      <table>
                          <independentVar>aero/alpha-rad</independentVar>
                          <tableData>
                             -0.20     -0.68
                              0.00	0.20
                              0.23	1.20
                              0.46	0.20
                          </tableData>
                      </table>
                </product>
            </function>

            <function name="aero/coefficient/dCLflap">
                <description>Delta_Lift_due_to_flaps</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/flap-pos-norm</property>
                    <property>aero/function/kCLge</property>
                    <property>aero/function/kCLsb</property>
                    <property>aero/function/kCLsp</property>
                    <value>0.9</value>
                </product>
            </function>

            <function name="aero/coefficient/CLde">
                <description>Lift_due_to_Elevator_Deflection</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>fcs/elevator-pos-rad</property>
                    <value>0.2</value>
                </product>
            </function>

        </axis>

        <axis name="ROLL">

            <function name="aero/coefficient/Clb">
                <description>Roll_moment_due_to_beta</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>aero/beta-rad</property>
                    <value>-0.09</value>
                </product>
            </function>

            <function name="aero/coefficient/Clp">
                <description>Roll_moment_due_to_roll_rate</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>aero/bi2vel</property>
                    <property>velocities/p-aero-rad_sec</property>
                    <value>-0.4</value>
                </product>
            </function>

            <function name="aero/coefficient/Clr">
                <description>Roll_moment_due_to_yaw_rate</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>aero/bi2vel</property>
                    <property>velocities/r-aero-rad_sec</property>
                    <value>0.09</value>
                </product>
            </function>

            <function name="aero/coefficient/Clda">
                <description>Roll_moment_due_to_aileron</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>fcs/left-aileron-pos-rad</property>
                      <table>
                          <independentVar>velocities/mach</independentVar>
                          <tableData>
                              0.0	0.100
                              2.0	0.033
                          </tableData>
                      </table>
                </product>
            </function>

            <function name="aero/coefficient/Cldr">
                <description>Roll_moment_due_to_rudder</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>fcs/rudder-pos-rad</property>
                    <value>0.01</value>
                </product>
            </function>
        </axis>

        <axis name="PITCH">
            <function name="aero/coefficient/Cmalpha">
                <description>Pitch_moment_due_to_alpha</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/cbarw-ft</property>
                    <property>aero/alpha-rad</property>
                    <value>-0.6</value>
                </product>
            </function>
            <function name="aero/coefficient/Cmde">
                <description>Pitch_moment_due_to_elevator</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/cbarw-ft</property>
                    <property>fcs/elevator-pos-rad</property>
                      <table>
                          <independentVar>velocities/mach</independentVar>
                          <tableData>
                              0.0	-1.20
                              2.0	-0.30
                          </tableData>
                      </table>
                </product>
            </function>
            <function name="aero/coefficient/Cmq">
                <description>Pitch_moment_due_to_pitch_rate</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/cbarw-ft</property>
                    <property>aero/ci2vel</property>
                    <property>velocities/q-aero-rad_sec</property>
                    <value>-27.0</value>
                </product>
            </function>
            <function name="aero/coefficient/Cmadot">
                <description>Pitch_moment_due_to_alpha_rate</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/cbarw-ft</property>
                    <property>aero/ci2vel</property>
                    <property>aero/alphadot-rad_sec</property>
                    <value>-16.0</value>
                </product>
            </function>
        </axis>

        <axis name="YAW">
            <function name="aero/coefficient/Cnb">
                <description>Yaw_moment_due_to_beta</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>aero/beta-rad</property>
                    <value>0.26</value>
                </product>
            </function>
            <function name="aero/coefficient/Cnr">
                <description>Yaw_moment_due_to_yaw_rate</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>aero/bi2vel</property>
                    <property>velocities/r-aero-rad_sec</property>
                    <value>-0.35</value>
                </product>
            </function>
            <function name="aero/coefficient/Cndr">
                <description>Yaw_moment_due_to_rudder</description>
                <product>
                    <property>aero/qbar-psf</property>
                    <property>metrics/Sw-sqft</property>
                    <property>metrics/bw-ft</property>
                    <property>fcs/rudder-pos-rad</property>
                    <value>-0.20</value>
                </product>
            </function>
        </axis>
    </aerodynamics>

    <external_reactions>

 <force name="pushback" frame="BODY">
  <location unit="IN">
   <x>  -139 </x>
   <y>    0.0 </y>
   <z>  -71.0 </z>
  </location>
  <direction>
   <x>1</x>
   <y>0</y>
   <z>0</z>
  </direction>
 </force>

</external_reactions>


<!--
    <output name="B737_datalog.csv" rate="20" type="CSV">
        <property> aero/qbar-psf </property>
        <property> attitude/phi-rad </property>
        <property> position/h-sl-ft </property>
        <property> velocities/vc-kts </property>
        <property> fcs/throttle-cmd-norm </property>
        <property> fcs/elevator-pos-norm </property>
        <rates> ON </rates>
        <velocities> ON </velocities>
        <forces> ON </forces>
        <moments> ON </moments>
        <position> ON </position>
        <propulsion> ON </propulsion>
        <aerosurfaces> OFF </aerosurfaces>
        <fcs> OFF </fcs>
        <ground_reactions> ON </ground_reactions>
    </output>
-->
</fdm_config>