diff --git a/Aircraft-yasim/j3cub.xml b/Aircraft-yasim/j3cub.xml
index b96d28624..1fcc362ad 100644
--- a/Aircraft-yasim/j3cub.xml
+++ b/Aircraft-yasim/j3cub.xml
@@ -41,7 +41,7 @@ since it is what the weight-and-balance site above uses.
 <cruise speed="64" alt="0">
   <control-setting axis="/controls/throttle[0]" value="0.75"/>
   <control-setting axis="/controls/mixture[0]" value="0.75"/>
-  <control-setting axis="/controls/elevator" value="0.1"/>
+  <control-setting axis="/controls/elevator-trim" value="0.1"/>
 </cruise>
 
 <!-- pilot's eyepoint -->
@@ -59,9 +59,9 @@ since it is what the weight-and-balance site above uses.
   Note that the J3 Cub has no flaps.  With a stall speed of 25kt, who
   needs them?  From what I've read, the ailerons add lots of drag.
 -->
-<wing x="-0.80" y="0.42" z="0.0" taper="1.0" incidence="2" twist="-2"
+<wing x="-0.80" y="0.42" z="0.0" taper="1.0" incidence="2" twist="-3"
       length="4.87" chord="1.60" sweep="0" dihedral="5" camber="0.1">
-  <stall aoa="17" width="2" peak="1.5"/>
+  <stall aoa="18" width="4" peak="1.5"/>
   <flap0 start=".31" end="0.85" lift="1.5" drag="1.4"/>
   <control-input axis="/controls/aileron" control="FLAP0" split="true"/>
   <control-input axis="/controls/aileron-trim" control="FLAP0" split="true"/>
@@ -74,7 +74,7 @@ since it is what the weight-and-balance site above uses.
 <hstab x="-4.87" y="0.05" z="-0.42" taper="0.8" effectiveness="1.24"
        length="1.49" chord="1.13" sweep="0">
   <stall aoa="16" width="4" peak="1.5"/>
-  <flap0 start="0" end="1" lift="1.5" drag="1.2"/>
+  <flap0 start="0" end="1" lift="1.4" drag="1.2"/>
   <control-input axis="/controls/elevator" control="FLAP0"/>
   <control-input axis="/controls/elevator-trim" control="FLAP0"/>
   <control-output control="FLAP0" prop="/surface-positions/elevator-pos-norm"/>
@@ -130,6 +130,8 @@ since it is what the weight-and-balance site above uses.
   weight-and-balance page cited at the start.
 -->
 
+<ballast x="-4.0" y="0" z="-0.70" mass="-75"/>
+
 <!-- pilot -->
 <weight x="-0.91" y="0" z="-0.70" mass-prop="/yasim/j3cub/pilot-lb"/>