void Power::Propeller::ReloadParams_automagic(SimpleXMLTransfer* xml)
{
SimpleXMLTransfer* p = xml->getChild("battery.shaft.propeller");
D = p->getDouble("D");
H = p->getDouble("H");
J = p->getDouble("J");
double F = xml->getDouble("F");
double V = xml->getDouble("V");
// Der Sturz wird in jedem Fall aus der Modelldatei gelesen, ansonsten muss man ja eine
// Propellerdatei fuer jeden Sturz extra haben.
CalcDownthrust(p);
{
// Calculate rotational speed and torque needed:
// F = M_PI * 0.25 * D*D * RHO * (V_X + filter.val/2) * filter.val * ETA_PROP;
// F = M_PI * 0.25 * D*D * RHO * (V + (Hn-V)/2) * (Hn-V) * ETA_PROP;
// F = M_PI * 0.25 * D*D * RHO * (V/2 + Hn/2) * (Hn-V) * ETA_PROP;
double n = sqrt( (8*F/(M_PI*D*D*RHO*ETA_PROP)) + V*V)/H;
double M = F * (V + (V + H*n)/2) / (2*M_PI*n) * i;
// Save these values so the engine can adjust itself to them:
p->setAttribute("automagic.n_P", doubleToString(n));
p->setAttribute("automagic.M_P", doubleToString(M));
}
omega_fold = p->attributeAsDouble("n_fold", -1)*2*M_PI;
}
