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Increased turbo to 4.0. Minor adjustments.

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Added steering to tail wheel.
Moved fuel tanks to more accurate position.
Adjusted moment for propeller and propeller efficiency.
This commit is contained in:
jimw 2003-05-22 13:48:02 +00:00
parent d6b41a3e3b
commit fa6df33e7b
1 changed files with 23 additions and 12 deletions
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35
Aircraft-yasim/p51d.xml
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@ -41,7 +41,6 @@ The reference datum for measurements is the nose.
</approach>
<!-- Cruise configuration -->
<!-- 350 mph, 304 knots -->
<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"/>
@ -65,7 +64,7 @@ flap drag not available
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="0.97" lift="1.3" drag="1.4"/>
<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"/>
@ -84,7 +83,7 @@ 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" incidence="-0.62">
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"/>
@ -93,12 +92,20 @@ flap drag not available
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="110"
eng-power="1490" eng-rpm="2300"
turbo-mul="2.5" wastegate-mp="30"
cruise-alt="25000" cruise-power="1350"
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"/>
@ -107,12 +114,16 @@ 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="PROPPITCH"
src0="0" src1="1" dst0="0.40" dst1="0.80"/>
src0="0" src1="1" dst0="0.40" dst1="0.82"/>
<control-input axis="/controls/engines/engine[0]/boost" control="BOOST"/>
</propeller>
<!-- Tail wheel -->
<gear x="-7.90" y="0" z="-0.96" compression="0.2" castering="true">
<!-- 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 -->
@ -134,9 +145,9 @@ flap drag not available
</gear>
<!-- Guess on wing tank positions -->
<tank x="-3.20" y="1.0" z="-0.61" capacity="726"/>
<tank x="-3.20" y="-1.0" z="-0.61" capacity="726"/>
<tank x="-5.00" y="0" z="0" capacity="671"/>
<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"/>