From 70a275fbbc972a8c4c7268ca144dd0433b7a84a0 Mon Sep 17 00:00:00 2001
From: jimw <jimw>
Date: Mon, 12 May 2003 15:28:03 +0000
Subject: [PATCH] Made some changes to improve aerobatic performance, so it can
 now do pretty much what i've seen p-51d's do.  Be careful of spins. Added
 vstab incidence (real ones have it) thus improving takeoff behavior. Reduced
 turbo-mul to what it probably should be. Returned wing camber to Andy's
 estimate. Increased flap drag.  And tried making adjustments to get the thing
 to not glide so impossibly far.

---
 Aircraft-yasim/p51d.xml | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/Aircraft-yasim/p51d.xml b/Aircraft-yasim/p51d.xml
index ed351b3cb..4a152a9f4 100644
--- a/Aircraft-yasim/p51d.xml
+++ b/Aircraft-yasim/p51d.xml
@@ -55,17 +55,17 @@ The reference datum for measurements is the nose.
 <cockpit x="-4.495" y="0" z="0.689"/>
 
 <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"/>
+          width="0.94" taper="0.38"/>
 
 <!--
 stall aoa not available
 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" camber="0.01">
+<wing x="-3.96" y="0.55" z="-0.60" taper="0.466" incidence="0"
+      length="5.16" chord="2.845" sweep="-3.5" dihedral="5" camber="0.1">
   <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"/>
+  <flap0 start="0.024" end="0.543" lift="1.2" drag="1.8"/>
+  <flap1 start="0.543" end="0.97" lift="1.3" drag="1.4"/>
   <control-input axis="/controls/flight/flaps" control="FLAP0"/>
   <control-output control="FLAP0" prop="/surface-positions/flap-pos-norm"/>
   <control-speed control="FLAP0" transition-time="5"/>
@@ -73,7 +73,7 @@ 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="3.5"
+<hstab x="-8.62" y="0.18" z="0.34" taper="0.639" effectiveness="3.5"
        length="1.834" chord="1.256" sweep="0" incidence="2">
   <stall aoa="15" width="4" peak="1.5"/>
   <flap0 start="0.0" end="1.8" lift="1.65" drag="1.2"/>
@@ -84,10 +84,10 @@ flap drag not available
 
 <!-- rudder has to be able to counteract aileron drag -->
 <vstab x="-9.30" y="0" z="-0.37" taper="0.432" effectiveness="3.5"
-       length="1.971" chord="2.65" sweep="25">
+       length="1.971" chord="2.65" sweep="25"  incidence="-0.62">
   <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"/>
+  <control-input axis="/controls/flight/rudder" square="true" control="FLAP0" invert="true"/>
   <control-input axis="/controls/flight/rudder-trim" control="FLAP0" invert="true"/>
   <control-output control="FLAP0" prop="/surface-positions/rudder-pos-norm"
 		  min="1" max="-1"/>
@@ -97,9 +97,9 @@ flap drag not available
            radius="1.75" 
            mass="1690" moment="110"
            eng-power="1490" eng-rpm="2300"
-           turbo-mul="2.5" wastegate-mp="30"
+           turbo-mul="2.0" wastegate-mp="30"
            cruise-alt="25000" cruise-power="1350"
-           cruise-speed="304" cruise-rpm="2700"
+           cruise-speed="380" cruise-rpm="2900"
            min-rpm="800" max-rpm="3000" >
   <actionpt x="-1.25" y="0" z="0"/>
   <control-input axis="/controls/engines/engine[0]/throttle" control="THROTTLE"/>
@@ -111,11 +111,11 @@ flap drag not available
 </propeller>
 
 <!-- Tail wheel -->
-<gear x="-7.90" y="0" z="-1.03" compression="0.2">
+<gear x="-7.90" y="0" z="-0.96" compression="0.2">
 </gear>
 
  <!-- left main -->
-<gear x="-2.79" y="1.81" z="-2.20" compression="0.8" spring="1.0">
+<gear x="-2.79" y="1.81" z="-2.20" compression="0.3" spring="1.0" damp="2.0">
   <control-input axis="/controls/gear/wheel[0]/brake" control="BRAKE"/>
   <control-input axis="/controls/gear/parking-brake" control="BRAKE" split="true"/>
   <control-input axis="/controls/gear/gear-down" control="EXTEND"/>
@@ -124,7 +124,7 @@ flap drag not available
 </gear>
 
  <!-- right main -->
-<gear x="-2.79" y="-1.81" z="-2.20" compression="0.8" spring="1.0">
+<gear x="-2.79" y="-1.81" z="-2.20" compression="0.3" spring="1.0" damp="2.0">
   <control-input axis="/controls/gear/wheel[1]/brake" control="BRAKE"/>
   <control-input axis="/controls/gear/parking-brake" control="BRAKE" split="true"/>
   <control-input axis="/controls/gear/gear-down" control="EXTEND"/>