diff --git a/Aircraft-yasim/p51d.xml b/Aircraft-yasim/p51d.xml
index 39e6c371b..81ce53f6b 100644
--- a/Aircraft-yasim/p51d.xml
+++ b/Aircraft-yasim/p51d.xml
@@ -29,7 +29,7 @@ The reference datum for measurements is the nose.
 -->
 
 <!-- Weight of everything but fuel  (7010 empty) -->
-<airplane mass="8990">
+<airplane mass="7390">
 
 <!-- Approach configuration -->
 <approach speed="150" aoa="6.6">
@@ -46,6 +46,7 @@ The reference datum for measurements is the nose.
   <control-setting axis="/controls/engines/engine[0]/throttle" value="1.00"/>
   <control-setting axis="/controls/engines/engine[0]/mixture" value="1.00"/>
   <control-setting axis="/controls/engines/engine[0]/propeller-pitch" value="1.0"/>
+  <control-setting axis="/controls/engines/engine[0]/boost" value="1.0"/>
   <control-setting axis="/controls/flight/flaps" value="0.0"/>
   <control-setting axis="/controls/gear/gear-down" value="0"/>
 </cruise>
@@ -62,7 +63,7 @@ flap drag not available
 -->
 <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="12" width="4" peak="1.5"/>
+  <stall aoa="14" 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"/>
@@ -74,7 +75,7 @@ flap drag not available
 
 <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="13" width="4" peak="1.5"/>
+  <stall aoa="15" 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"/>
@@ -106,6 +107,7 @@ flap drag not available
   <control-input axis="/controls/engines/engine[0]/magnetos" control="MAGNETOS"/>
   <control-input axis="/controls/engines/engine[0]/mixture" control="MIXTURE"/>
   <control-input axis="/controls/engines/engine[0]/propeller-pitch" control="ADVANCE"/>
+  <control-input axis="/controls/engines/engine[0]/boost" control="BOOST"/>
 </propeller>
 
 <gear x="-7.90" y="0" z="-1.03" compression="0.8" spring="1.0" damp="2">