public override void CalculatePerformance(double airRatio, double commandedThrottle, double flowMult, double ispMult)
{
base.CalculatePerformance(airRatio, commandedThrottle, flowMult, ispMult);
combusting = running;
statusString = "Nominal";
if (ffFraction <= 0d)
{
combusting = false;
statusString = "No fuel";
}
else if (underwater)
{
combusting = false;
statusString = "Underwater";
}
shaftPower = 0d;
engineThrust = 0d;
double deltaTime = TimeWarp.fixedDeltaTime;
if (engine == null)
{
if (combusting)
{
fxPower = (float)throttle;
shaftPower = maxPower * throttle * ispMult * flowMult;
fuelFlow = shaftPower * BSFC * flowMult;
}
else
{
fxPower = 0f;
}
if (shaftPower > 0d)
{
double desiredTemp = t0 + 20d + throttle * 100d; // total hack
if (temperature > desiredTemp - 1d)
{
temperature = desiredTemp;
}
else
{
temperature += 20d * deltaTime;
}
}
else
{
if (temperature < t0 + 1d)
{
temperature = t0;
}
else
{
temperature += (t0 - temperature) * 0.05d * deltaTime;
}
}
}
else
{
engine.Update(this, propRPM * gearRatioRecip, deltaTime);
shaftPower = engine.GetShaftPower() * ispMult * flowMult;
fuelFlow = engine.GetFuelFlow() * flowMult;
temperature = engine.GetTemp();
fxPower = engine.GetFXPower();
engineThrust = engine.GetEngineThrust();
statusString = engine.GetStatus();
}
thrust += engineThrust;
// now handle propeller
if (rho > 0d)
{
propJSB.SetAdvance(rpmLever);
propThrust = propJSB.Calculate(shaftPower, rho, vel, eair0, TimeWarp.fixedDeltaTime);
propRPM = propJSB.GetRPM();
propPitch = (float)propJSB.GetPitch();
// TODO: Assign thrustRot and thrustOffset based on PFactor calcs
double tmpRatio = propRPM * maxRPMRecip;
if (tmpRatio > 1d)
{
tmpRatio *= tmpRatio;
}
// engine overspeed correction (internal friction at high RPM)
if (tmpRatio > 1.1)
{
propRPM -= (tmpRatio * tmpRatio * tmpRatio) * maxRPM * deltaTime;
}
thrust += propThrust;
}
if (fuelFlow > 0d)
{
Isp = thrust / (fuelFlow * 9.80665d);
SFC = 3600d / Isp;
}
}
