diff --git a/Aircraft/c310-set.xml b/Aircraft/c310-set.xml
index 9b773655c..826209a54 100644
--- a/Aircraft/c310-set.xml
+++ b/Aircraft/c310-set.xml
@@ -84,6 +84,7 @@ October 23 2001 John Check, fgpanels@rockfish.net
  </input>
 
  <controls>
+  <aileron-trim>-0.026</aileron-trim>
   <magnetos n="0">3</magnetos>
   <magnetos n="1">3</magnetos>
  </controls>
diff --git a/Aircraft/c310u3a-3d-set.xml b/Aircraft/c310u3a-3d-set.xml
index 5479bd536..8cd35795d 100644
--- a/Aircraft/c310u3a-3d-set.xml
+++ b/Aircraft/c310u3a-3d-set.xml
@@ -107,6 +107,7 @@ March 2002 Jim Wilson, jimw@kelcomaine.com
  </input>
 
  <controls>
+  <aileron-trim>-0.026</aileron-trim>
   <magnetos n="0">3</magnetos>
   <magnetos n="1">3</magnetos>
  </controls>
diff --git a/Aircraft/c310u3a-set.xml b/Aircraft/c310u3a-set.xml
index d20bdc5b4..cdd75e7bc 100644
--- a/Aircraft/c310u3a-set.xml
+++ b/Aircraft/c310u3a-set.xml
@@ -84,6 +84,7 @@ March 2002 Jim Wilson, jimw@kelcomaine.com
  </input>
 
  <controls>
+  <aileron-trim>-0.026</aileron-trim>
   <magnetos n="0">3</magnetos>
   <magnetos n="1">3</magnetos>
  </controls>