Hi Josh,
Hum, i guess you thought I did a poor job in stating why the AirCrane model is sunk into the ground! I do know the exact reason.
Specifically, it is because the contact points I am using in the FDM file are indeed the point positions for the Alouette-III and I haven't adjusted them.
When I stated the following
due to different positioning systems between YASim and JSBSim
what I meant was that YASIm uses a different syntax to position the gear
- Code: Select all
<gear x="8.295" y="0" z="-4"
compression="0.1"
spring="3"
damp="1.0"
sfric="1.5"
dfric="0.8">
<control-input control="STEER" axis="/controls/flight/rudder" square="true" src0="-1" dst0="-1.0" src1="1" dst1="1.0"/>
<control-output control="STEER" prop="controls/gear/steering"/>
</gear>
<!-- left gear -->
<gear x="1.190" y="3.237" z="-4"
compression="0.1"
spring="3.2"
damp="1.0"
sfric="1.5"
dfric="0.8"
initial-load="1">
<control-input control="BRAKE" axis="/controls/gear/brake-left"/>
<control-input control="BRAKE" axis="/controls/gear/brake-parking"/>
</gear>
JSBSim uses the following syntax
- Code: Select all
<ground_reactions>
<contact type="BOGEY" name="LEFT"> <!--cp 00-->
<location unit="M">
<x> 0.90 </x>
<y> -1.1926</y>
<z> -1.32694 </z>
</location>
<static_friction> 0.8 </static_friction>
<dynamic_friction> 0.5 </dynamic_friction>
<rolling_friction> 0.02 </rolling_friction>
<spring_coeff unit="LBS/FT"> 5000 </spring_coeff>
<damping_coeff unit="LBS/FT/SEC"> 1200</damping_coeff>
<retractable>1</retractable>
<brake_group> LEFT </brake_group>
</contact>
<contact type="BOGEY" name="RIGHT"> <!--cp 01 -->
<location unit="M">
<x> 0.90 </x>
<y> 1.1926 </y>
<z>-1.32 </z>
</location>
<static_friction> 0.8 </static_friction>
<dynamic_friction> 0.5 </dynamic_friction>
<rolling_friction> 0.02 </rolling_friction>
<spring_coeff unit="LBS/FT"> 5000 </spring_coeff>
<damping_coeff unit="LBS/FT/SEC"> 1200 </damping_coeff>
<retractable>1</retractable>
<brake_group> RIGHT </brake_group>
</contact>
<contact type="BOGEY" name="NOSE"> <!--cp 02-->
<location unit="M">
<x> -2.207 </x>
<y> 0.0 </y>
<z> -1.32694 </z>
</location>
<static_friction> 0.8</static_friction>
<dynamic_friction> 0.5 </dynamic_friction>
<rolling_friction> 0.02 </rolling_friction>
<spring_coeff unit="LBS/FT"> 6000 </spring_coeff>
<damping_coeff unit="LBS/FT/SEC"> 2000</damping_coeff>
<max_steer unit="DEG"> 30.00 </max_steer>
<retractable>1</retractable>
<brake_group> NONE </brake_group>
</contact>
<contact type="BOGEY" name="TAIL-BUMPER"> <!--cp 03-->
<location unit="M">
<x> 6.00652 </x>
<y> 0.0 </y>
<z> -0.60059 </z>
</location>
<static_friction> 0.8</static_friction>
<dynamic_friction> 0.5 </dynamic_friction>
<rolling_friction> 0.02 </rolling_friction>
<spring_coeff unit="LBS/FT"> 2000 </spring_coeff>
<damping_coeff unit="LBS/FT/SEC"> 150</damping_coeff>
<retractable>1</retractable>
<brake_group> NONE </brake_group>
</contact>
So technically they do use a different system to position gear, at least different syntax. The system that is positioning the AirCrane model's gear contact points presently is the JSBSim system setup for the Alouette-III. The system setup for the AirCrane model is no longer being used.
Hopefully that clears this up for anyone following now or at a later date.
Kansas and Ohio/Midwest scenery development.
KEQA, 3AU, KRCP Airport Layout
Intel i7/GeForce RTX 2070/Max-Q