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fgdata/Aircraft/Instruments-3d/winter-ball/ball.xml

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<?xml version="1.0"?>
<PropertyList>
<path>ball.ac</path>
<animation>
<type>rotate</type>
<object-name>ball</object-name>
<property>/instrumentation/slip-skid-ball/indicated-slip-skid</property>
<factor>5.729</factor>
<!--
From the source for slip_skid_ball.cxx, the number returned is (-z_accel/y_accel)*10.
For small theta, theta~=tan(theta) when theta is in radians. So the angle of a "ball"
undergoing z_accel and y_accel hung on the end of a string makes with the verticle
will be approximately -z_accel/y_accel radians. Converting to degrees, multiply by
180/pi=57.29, or 5.729 times the returned value. Edited by Dave Perry, 2/26/06.
-->
<min-deg>-5</min-deg>
<max-deg>5</max-deg>
<center>
<x-m>0</x-m>
<y-m>0</y-m>
<z-m>0.25</z-m> <!-- Makes the radius of curvature for the glass tube ~10 inches -->
</center>
<axis>
<x>-1</x>
<y>0</y>
<z>0</z>
</axis>
</animation>
</PropertyList>