<PropertyList>
  <particlesystem>
    <name>smoke</name>
    <texture>smoke.png</texture>
    <emissive type = "bool">false</emissive>
    <lighting type = "bool">false</lighting>
    <condition>
      <and>
        <greater-than>
          <property>/engines/engine[0]/n2</property>
          <value>30</value>
        </greater-than>
        <greater-than>
          <property>/position/altitude-ft</property>
          <value>19000</value>
        </greater-than>
        <less-than>
          <property>environment/temperature-degc</property>
          <value>-30</value>
        </less-than>
      </and>
    </condition>
    <attach>world</attach>
    <placer>
      <type>point</type>
    </placer>
    <shooter>
      <theta-min-deg>70</theta-min-deg>
      <theta-max-deg>100</theta-max-deg>
      <phi-min-deg>70</phi-min-deg>
      <phi-max-deg>100</phi-max-deg>
      <speed-mps>
        <value>5</value>
        <spread>2.5</spread>
      </speed-mps>
      <rotation-speed>
        <x-min-deg-sec>0</x-min-deg-sec>
        <y-min-deg-sec>0</y-min-deg-sec>
        <z-min-deg-sec>-90</z-min-deg-sec>
        <x-max-deg-sec>0</x-max-deg-sec>
        <y-max-deg-sec>0</y-max-deg-sec>
        <z-max-deg-sec>0</z-max-deg-sec>
      </rotation-speed>
    </shooter>
    <counter>
      <particles-per-sec>
        <value>35</value>
        <spread>0</spread>
      </particles-per-sec>
    </counter>
    <align>billboard</align>
    <particle>
      <start>
        <color>
          <red>
            <value>0.7</value>
          </red>
          <green>
            <value>0.7</value>
          </green>
          <blue>
            <value>0.7</value>
          </blue>
          <alpha>
            <value>0.1</value>
          </alpha>
        </color>
        <size>
          <value>2.0</value>
        </size>
      </start>
      <end>
        <color>
          <red>
            <value>0.8</value>
          </red>
          <green>
            <value>0.8</value>
          </green>
          <blue>
            <value>0.8</value>
          </blue>
          <alpha>
            <value>1</value>
          </alpha>
        </color>
        <size>
          <value>20</value>
        </size>
      </end>
      <life-sec>
        <value>20</value>
      </life-sec>
      <mass-kg>0.5</mass-kg>
      <radius-m>0.5</radius-m>
    </particle>
    <program>
      <fluid>air</fluid>
      <gravity type = "bool">true</gravity>
      <wind type = "bool">true</wind>
    </program>
  </particlesystem>
</PropertyList>
