[Crrcsim-devel] Prop and rotor automagic in engine

[<a_r...@gm...>]

Hi!

Don't know if it's correct, but I guess with several props or rotors, the
p's for each prop or rotor have to be added up for the engine?

So:
=============
  // Gew<FC>nschte Drehzahl und gew<FC>nschtes Moment
  double M_P    = xml->getDouble("battery.shaft.propeller.automagic.M_P");
  double n_P    = xml->getDouble("battery.shaft.propeller.automagic.n_P");

  // Mit dem Wirkungsgrad des Getriebes ergibt sich die aufzubringende
  // mechanische Leistung
  double P_mech = M_P * 2 * M_PI * n_P / eta;
=============

should become something like:
=============
  // Sum up all the propellers and rotors
  double P_mech = 0;

  SimpleXMLTransfer* shaft = xml->getChild("battery.shaft");
  int nChilds = shaft->getChildCount();
  for( int currentChildIndex = 0; currentChildIndex < nChilds; currentChildIndex++) {
    SimpleXMLTransfer* currentChild = shaft->getChildAt( currentChildIndex);

    std::string childName = currentChild->getName();

    if( childName.compare( "propeller") == 0 || childName.compare( "rotor") == 0)
    {
      double M_P = currentChild->getDouble("automagic.M_P");
      double n_P = currentChild->getDouble("automagic.n_P");

      P_mech += M_P * 2 * M_PI * n_P / eta;
    }
  }
=============
The code above won't really work yet, because there's only one gearing for 
the automagic props. Am I right, that we should add one gearing for each
prop and rotor?

Ciao,
Andreas

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