diff --git a/Aircraft-yasim/p51d.xml b/Aircraft-yasim/p51d.xml
index c39adcbba..39e6c371b 100644
--- a/Aircraft-yasim/p51d.xml
+++ b/Aircraft-yasim/p51d.xml
@@ -10,6 +10,7 @@ performance data, and wild guesses.  These sites provided particularly
 useful information or were simply fun to visit:
 
 Performance data:
+http://www.hq.nasa.gov/office/pao/History/SP-468/app-a2.htm
 http://www.olympicflightmuseum.com/aircraft_gallery/p51d_mustang.htm
 http://www.btinternet.com/~lee_mail/P51.html
 http://www.sprucegoose.org/pdfs/planes/P51Mustang.pdf
@@ -52,16 +53,16 @@ The reference datum for measurements is the nose.
 <!-- pilot's eyepoint -->
 <cockpit x="-4.495" y="0" z="0.689"/>
 
-<fuselage ax="0.0" ay="0.0" az="0.0" bx="-9.9" by="0" bz="0.0"
-          width="0.897" taper="0.30"/>
+<fuselage ax="0.0" ay="0.0" az="0.0" bx="-9.9" by="0.0" bz="0.0"
+          width="0.94" taper="0.14"/>
 
 <!--
 stall aoa not available
 flap drag not available
 -->
-<wing x="-3.96" y="0.49" z="-0.67" taper="0.466" incidence="1"
+<wing x="-3.96" y="0.49" z="-0.67" taper="0.466" incidence="1" 
       length="5.16" chord="2.845" sweep="3.5" dihedral="5">
-  <stall aoa="13" width="4" peak="1.5"/>
+  <stall aoa="12" width="4" peak="1.5"/>
   <flap0 start="0.024" end="0.543" lift="1.2" drag="1.4"/>
   <flap1 start="0.543" end="0.97" lift="1.2" drag="1.4"/>
   <control-input axis="/controls/flight/flaps" control="FLAP0"/>
@@ -71,18 +72,18 @@ flap drag not available
   <control-input axis="/controls/flight/aileron-trim" control="FLAP1" split="true"/>
 </wing>
 
-<hstab x="-8.62" y="0.18" z="0.35" taper="0.639" effectiveness="1.8"
+<hstab x="-8.62" y="0.18" z="0.35" taper="0.639" effectiveness="1.0"
        length="1.834" chord="1.256" sweep="0" incidence="2">
-  <stall aoa="14" width="4" peak="1.5"/>
-  <flap0 start="0.0" end="1.8" lift="1.8" drag="1.2"/>
+  <stall aoa="13" width="4" peak="1.5"/>
+  <flap0 start="0.0" end="1.8" lift="1.4" drag="1.2"/>
   <control-input axis="/controls/flight/elevator" control="FLAP0"/>
   <control-input axis="/controls/flight/elevator-trim" control="FLAP0"/>
   <control-output control="FLAP0" prop="/surface-positions/elevator-pos-norm"/>
 </hstab>
 
 <!-- rudder has to be able to counteract aileron drag -->
-<vstab x="-9.30" y="0" z="-0.37" taper="0.432" effectiveness="3.0"
-       length="1.971" chord="1.55" sweep="45">
+<vstab x="-9.30" y="0" z="-0.37" taper="0.432" effectiveness="1.5"
+       length="1.971" chord="2.65" sweep="25">
   <stall aoa="15" width="4" peak="1.5"/>
   <flap0 start="0" end="1" lift="1.3" drag="1.2"/>
   <control-input axis="/controls/flight/rudder" control="FLAP0" invert="true"/>
@@ -93,9 +94,9 @@ flap drag not available
 
 <propeller   x="-0.75" y="0" z="0"
            radius="1.75" 
-           mass="1690" moment="12"
+           mass="1690" moment="110"
            eng-power="1490" eng-rpm="2300"
-           turbo-mul="1.25" wastegate-mp="47"
+           turbo-mul="2.0" wastegate-mp="47"
            cruise-alt="25000" cruise-power="1350"
            cruise-speed="304" cruise-rpm="2700"
            min-rpm="800" max-rpm="3000" >
@@ -137,8 +138,10 @@ flap drag not available
 <ballast x="-4.495" y="0" z="0.689" mass="180"/>
 
 <!-- armament -->
+<!--  Had too much weight I think...disable until stall speed fixed
 <ballast x="-3.20" y="0.7" z="-0.60" mass="800"/> 
 <ballast x="-3.20" y="-0.7" z="-0.60" mass="800"/> 
+-->
 
 <!-- prop -->
 <!--