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<animation>
<type>spin</type>
<object-name>LeftWheel</object-name>
<condition>
<property>gear/gear[1]/wow</property>
</condition>
<property>velocities/groundspeed-kt</property>
<factor>12.3</factor> <!-- Wheel circumference 2.513 m -->
<center>
<x-m>-0.046786</x-m>
<y-m>-1.07103</y-m>
<z-m>-0.567522</z-m>
</center>
<axis>
<x> 0.0</x>
<y>-1.0</y>
<z> 0.0</z>
</axis>
</animation>
This snippet is from the ercoupe model pab and I are developing. It spins with JSBSim in CVS flightgear... The whole model is here:
http://gitorious.org/projects/ron-s-hanger it is very much a work in progress.
Ron