fgdata/Aircraft/c172p/Models/Interior/Panel/Instruments/tc/tc.xml

<?xml version="1.0"?>

<PropertyList>

 <path>tc.ac</path>

 <effect>
  <inherits-from>../../../../Effects/interior/c172p-flashlight</inherits-from>
  <object-name>Ball</object-name>
  <object-name>Face</object-name>
  <object-name>Airplane</object-name>
  <object-name>Background</object-name>
  <object-name>Flag</object-name>
 </effect>

 <animation>
  <type>material</type>
  <object-name>Ball</object-name>
  <object-name>Face</object-name>
  <object-name>Airplane</object-name>
  <object-name>Background</object-name>
  <emission>
   <red>1.0</red>
   <green>0.2</green>
   <blue>0.0</blue>
   <factor-prop>/sim/model/material/instruments/factor</factor-prop>
  </emission>
 </animation>

 <animation>
  <type>rotate</type>
  <object-name>Airplane</object-name>
  <property>/instrumentation/turn-indicator/indicated-turn-rate</property>
  <factor>20.0</factor>
  <axis>
   <x>-1</x>
   <y>0</y>
   <z>0</z>
  </axis>
 </animation>

 <animation>
  <type>rotate</type>
  <object-name>Ball</object-name>
  <property>/instrumentation/slip-skid-ball/indicated-slip-skid</property>
  <factor>20</factor> <!-- ini 5.729 -->
  <!--
   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.
   
   Edit by Daniel Dubreuil june 2014: I'd rather say
   Angle with the verticle (radians) -y_accel/z_accel
   FG indicated-slip-skid = -(y_accel/z_accel)*10
  -->
  <min-deg>-9.3</min-deg>
  <max-deg>9.3</max-deg>
  <center>
   <x-m>0</x-m>
   <y-m>0</y-m>
   <z-m>0.10</z-m>  <!-- 0.10 is fitted to the drawing. Initial 0.25 makes the radius of curvature for the glass tube ~10 inches and the angle +-4 deg (more sensitive) -->
  </center>
  <axis>
   <x>-1</x>
   <y>0</y>
   <z>0</z>
  </axis>
 </animation>

 <animation>
  <type>translate</type>
  <object-name>Flag</object-name>
  <property>/instrumentation/turn-indicator/spin</property>
  <factor>0.0040</factor>
  <axis>
   <x>0</x>
   <y>0</y>
   <z>1</z>
  </axis>
 </animation>

</PropertyList>