<?xml version="1.0"?>
<PropertyList>

 <fx>
    <engine>
        <name>burner</name>
        <mode>once</mode>
        <path>AI/Sounds/balloon-sound1.wav</path>
	    <condition>
    		<property>engines/engine[0]/running</property>
	    </condition>
        <volume>1.0</volume>
        <reference-dist>100.0</reference-dist>
        <max-dist>3000.0</max-dist>
    </engine>
 </fx>

</PropertyList>