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fgdata/Aircraft-yasim/p51d.xml
jimw fa6df33e7b Increased turbo to 4.0. Minor adjustments. 
Added steering to tail wheel.
Moved fuel tanks to more accurate position.
Adjusted moment for propeller and propeller efficiency.
2003-05-22 13:48:02 +00:00

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<?xml version="1.0"?>
<!--
************************************************************************
YASim aerodynamic model for a P-51D mustang
Started 2003-04-24 by Jim Wilson
This aerodynamic model is based on three-views, unauthoritative
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
Weight and balance:
http://www.p51.wjackparker.com/P51_Additional_reference_material/x_maintenance.htm
http://www.nzfpm.co.nz/aircraft/p51d.htm
http://www.wpafb.af.mil/museum/engines/eng33.htm
Three-view:
http://members.optushome.com.au/gjmustang/docs/3-View.html
(Note: I have local copies if this url becomes un-available)
The reference datum for measurements is the nose.
************************************************************************
-->
<!-- Weight of everything but fuel (7010 empty) -->
<airplane mass="7190">
<!-- Approach configuration -->
<approach speed="87" aoa="13">
<control-setting axis="/controls/engines/engine[0]/throttle" value="0.2"/>
<control-setting axis="/controls/engines/engine[0]/mixture" value="1.0"/>
<control-setting axis="/controls/engines/engine[0]/propeller-pitch" value="0.5"/>
<control-setting axis="/controls/flight/flaps" value="1.0"/>
<control-setting axis="/controls/gear/gear-down" value="1"/>
</approach>
<!-- Cruise configuration -->
<cruise speed="380" alt="25000">
<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="0.8"/>
<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>
<!-- 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="0.0" bz="0.0"
width="0.94" taper="0.38"/>
<!--
stall aoa not available
flap drag not available
-->
<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="1.8"/>
<flap1 start="0.543" end="0.94.5" 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"/>
<control-input axis="/controls/flight/aileron" control="FLAP1" split="true"/>
<control-input axis="/controls/flight/aileron-trim" control="FLAP1" split="true"/>
</wing>
<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"/>
<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="3.5"
length="1.971" chord="2.65" sweep="25" incidence="-0.58">
<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" 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"/>
</vstab>
<!-- moment calculated using formula submitted by Donald Simon:
MOI = # of Blades * (8.2*(10^-5))*(D^5), slug-ft^2
then converted to kg-m^2 and finally square root to kg-m for torque value -->
<!-- wastegate setting should not apply. set here so that calculations would approximate.
YASim doesn't model gear supercharger. Have read various figures (turbo-mul) 4.0 to 5.8 for
running the second stage blower. Fixing this would probably give more reasonable
performance at lower altitude -->
<!-- cruise-rpm roughly estimated from documented gear ratio of 0.479 -->
<propeller x="-0.75" y="0" z="0"
radius="1.75"
mass="1690" moment="94.5"
eng-power="1590" eng-rpm="3000"
turbo-mul="4.0" wastegate-mp="61"
cruise-alt="21400" cruise-power="1370"
cruise-speed="380" cruise-rpm="2900"
manual-pitch="true" >
<actionpt x="-1.25" y="0" z="0"/>
<control-input axis="/controls/engines/engine[0]/throttle" control="THROTTLE"/>
<control-input axis="/controls/engines/engine[0]/starter" control="STARTER"/>
<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="PROPPITCH"
src0="0" src1="1" dst0="0.40" dst1="0.82"/>
<control-input axis="/controls/engines/engine[0]/boost" control="BOOST"/>
</propeller>
<!-- Tail wheel -->
<!-- tail wheel "steerable" in p-51d (in stick back locked position it actually should be limited to 6deg +/-) -->
<gear x="-7.90" y="0" z="-0.96" compression="0.2">
<control-input axis="/controls/flight/rudder" control="STEER" square="true"
src0="-1.0" src1="1.0"
dst0="0.5" dst1="-0.5"/>
</gear>
<!-- left main -->
<gear x="-2.79" y="1.81" z="-2.20" compression="0.4" spring="0.7" damp="3.0">
<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"/>
<control-speed control="EXTEND" transition-time="6"/>
<control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/>
</gear>
<!-- right main -->
<gear x="-2.79" y="-1.81" z="-2.20" compression="0.4" spring="0.7" damp="3.0">
<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"/>
<control-speed control="EXTEND" transition-time="6"/>
<control-output control="EXTEND" prop="/gear/gear[1]/position-norm"/>
</gear>
<!-- Guess on wing tank positions -->
<tank x="-3.50" y="1.0" z="-0.61" capacity="726"/>
<tank x="-3.50" y="-1.0" z="-0.61" capacity="726"/>
<tank x="-6.50" y="0" z="0" capacity="671"/>
<!-- pilot -->
<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 -->
<!--
<ballast x="0.1" y="0" z="0.0" mass="200"/>
-->
</airplane>
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