<?xml version="1.0"?>

<!-- This system determines the state of the Boundary Layer Control (BLC)
     system.  The aerodynamic effects of BLC are set in the aircraft
     configuration file <aerodynamics> section, not here.  In order for
     the switch to work properly the number of engine rpm tests should
     match the number of engines installed!
--> 

<system name="BLC">

  <property>systems/BLC/active</property>

  <channel name="Boundary Layer Control">

       <switch name="systems/BLC/switch">
          <default value="0"/>
          <test  logic="AND" value="1">
               fcs/flap-pos-norm gt 0.51
               propulsion/engine[0]/n2 gt 65.0
               propulsion/engine[1]/n2 gt 65.0
          </test>
          <output>systems/BLC/active</output>
       </switch>

  </channel>

</system>
