From 2a4d95ed15d5db644f16d19b654fe851e5b06e40 Mon Sep 17 00:00:00 2001 From: aross <aross> Date: Wed, 28 Aug 2002 17:02:38 +0000 Subject: [PATCH] Lots of configuration work from Dave Perry. Moving the C.G. forward makes ground handling more realistic -- the tail comes off earlier due to stability effects, and the extra aerodynamic stability (and the extended rudder arm) makes the aircraft more controllable and less likely to ground loop. --- Aircraft-yasim/dc3.xml | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/Aircraft-yasim/dc3.xml b/Aircraft-yasim/dc3.xml index f2c140ab0..27fc37ea9 100644 --- a/Aircraft-yasim/dc3.xml +++ b/Aircraft-yasim/dc3.xml @@ -30,7 +30,7 @@ <wing x="-7.02" y="1.09" z="0.95" length="11.58" camber="0.1" chord="4.77" taper=".286" sweep="19" dihedral="4"> - <stall aoa="14" width="3" peak="1.5"/> + <stall aoa="14" width="6" peak="1.5"/> <flap0 start="0.04" end="0.38" lift="1.5" drag="1.2"/> <flap1 start="0.38" end="0.97" lift="1.2" drag="1.2"/> <control-input axis="/controls/flaps" control="FLAP0"/> @@ -44,20 +44,20 @@ <control-speed control="FLAP0" transition-time="5"/> </wing> -<hstab x="-18.12" y="0.41" z="0.27" length="3" +<hstab x="-18.12" y="0.41" z="0.27" length="3.5" effectiveness="2.00" chord="3" taper=".545" sweep="15"> - <stall aoa="14" width="3" peak="1.5"/> + <stall aoa="18" width="3" peak="1.5"/> <flap0 start="0" end="1" lift="1.5" drag="1.2"/> - <control-input axis="/controls/elevator" control="FLAP0"/> + <control-input axis="/controls/elevator" control="FLAP0" effectiveness="1.25"/> <control-input axis="/controls/elevator-trim" control="FLAP0"/> <control-output control="FLAP0" prop="/surface-positions/elevator-pos-norm"/> </hstab> -<vstab x="-18.12" y="0" z="0.95" length="2.72" +<vstab x="-18.12" y="0" z="0.95" length="2.72" effectiveness="1.25" chord="3.95" taper=".462" sweep="2"> <stall aoa="14" width="3" peak="1.5"/> <flap0 start="0" end="1" lift="1.5" drag="1.2"/> - <control-input axis="/controls/rudder" control="FLAP0" invert="true"/> + <control-input axis="/controls/rudder" control="FLAP0" effectiveness="1.25" invert="true"/> <control-input axis="/controls/rudder-trim" control="FLAP0" invert="true"/> <control-output control="FLAP0" prop="/surface-positions/rudder-pos-norm"/> </vstab> @@ -104,8 +104,8 @@ <gear x="-6.08" y="2.52" z="-3.49" compression="1" retract-time="7"> <control-input axis="/controls/parking-brake" control="BRAKE"/> <control-input axis="/controls/brakes[0]" control="BRAKE"/> - <control-input axis="/controls/rudder" control="BRAKE" square="1" - src0="-1" src1="1" dst0="0.5" dst1="-0.5"/> +<!-- <control-input axis="/controls/rudder" control="BRAKE" square="1" + src0="-1" src1="1" dst0="0.5" dst1="-0.5"/> --> <control-input axis="/controls/gear-down" control="EXTEND"/> <control-speed control="EXTEND" transition-time="7"/> <control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/> @@ -114,8 +114,8 @@ <gear x="-6.08" y="-2.52" z="-3.49" compression="1" retract-time="7"> <control-input axis="/controls/parking-brake" control="BRAKE"/> <control-input axis="/controls/brakes[1]" control="BRAKE"/> - <control-input axis="/controls/rudder" control="BRAKE" square="1" - src0="-1" src1="1" dst0="-0.5" dst1="0.5"/> +<!-- <control-input axis="/controls/rudder" control="BRAKE" square="1" + src0="-1" src1="1" dst0="-0.5" dst1="0.5"/> --> <control-input axis="/controls/gear-down" control="EXTEND"/> <control-speed control="EXTEND" transition-time="7"/> <control-output control="EXTEND" prop="/gear/gear[1]/position-norm"/> @@ -125,5 +125,6 @@ center section wing: 2 main including fuel system 210 gals. each (+48) and 2 aux. 201 gals. each (+83.5)" --> <tank x="-7.02" y="0" z="0.95" capacity="4932"/> +<ballast x="-18.0" y="0.0" z="0.6" mass="-2800"/> <!-- move CG forward --> </airplane>