diff --git a/FGData/AI/Aircraft/Aerotow/DR400/Models/dr400-ai.xml b/FGData/AI/Aircraft/Aerotow/DR400/Models/dr400-ai.xml
index 8089174..f46d13d 100644
--- a/FGData/AI/Aircraft/Aerotow/DR400/Models/dr400-ai.xml
+++ b/FGData/AI/Aircraft/Aerotow/DR400/Models/dr400-ai.xml
@@ -2,6 +2,6 @@
 
 <PropertyList include="AI/Aircraft/DR400/Models/dr400-ai.xml">
     <sound>
-        <path>AI/Aircraft/Aerotow/Sound/sound.xml</path>
+        <path>AI/Aircraft/Aerotow/DR400/Sound/sound.xml</path>
     </sound>
 </PropertyList>
diff --git a/FGData/AI/Aircraft/Aerotow/DR400/Sound/DR400-engine.wav b/FGData/AI/Aircraft/Aerotow/DR400/Sound/DR400-engine.wav
new file mode 100644
index 0000000..2346b17
Binary files /dev/null and b/FGData/AI/Aircraft/Aerotow/DR400/Sound/DR400-engine.wav differ
diff --git a/FGData/AI/Aircraft/Aerotow/DR400/Sound/sound.xml b/FGData/AI/Aircraft/Aerotow/DR400/Sound/sound.xml
new file mode 100644
index 0000000..a4d3433
--- /dev/null
+++ b/FGData/AI/Aircraft/Aerotow/DR400/Sound/sound.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<PropertyList>
+    <fx>
+        <engine>
+            <name>engine</name>
+            <mode>looped</mode>
+            <path>DR400-engine.wav</path>
+            <condition>
+                <property>/addons/by-id/org.flightgear.addons.Aerotow/addon-devel/sound/enable</property>
+            </condition>
+            <volume>
+                <offset>-0.95</offset>
+            </volume>
+            <pitch>
+                <property>velocities/true-airspeed-kt</property>
+                <factor>0.012</factor>
+                <offset>0.3</offset>
+                <min>0.3</min>
+                <max>1.0</max>
+            </pitch>
+            <reference-dist>150.0</reference-dist>
+            <max-dist>5000.0</max-dist>
+        </engine>
+    </fx>
+</PropertyList>