<?xml version="1.0"?>

<system name="holdback">

  <property value="0">systems/holdback/holdback-cmd</property>

  <channel name="Holdback_Launchbar">

     <summer name="systems/holdback/total_thrust">
        <input>propulsion/engine/thrust-lbs</input>
        <input>propulsion/engine[1]/thrust-lbs</input>
     </summer>

     <switch name="systems/holdback/switch">
          <default value="0"/>
          <test  logic="AND" value="systems/holdback/total_thrust">
                systems/holdback/holdback-cmd == 1
          </test>
          <output>external_reactions/holdback/magnitude</output>
     </switch>

  </channel>

</system>
