//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGPiston::Calculate(void)
{
RunPreFunctions();
if (FuelFlow_gph > 0.0) ConsumeFuel();
Throttle = FCS->GetThrottlePos(EngineNumber);
Mixture = FCS->GetMixturePos(EngineNumber);
// Input values.
p_amb = Atmosphere->GetPressure() * psftopa;
double p = Auxiliary->GetTotalPressure() * psftopa;
p_ram = (p - p_amb) * Ram_Air_Factor + p_amb;
T_amb = RankineToKelvin(Atmosphere->GetTemperature());
RPM = Thruster->GetRPM() * Thruster->GetGearRatio();
MeanPistonSpeed_fps = ( RPM * Stroke) / (360); // AKA 2 * (RPM/60) * ( Stroke / 12) or 2NS
IAS = Auxiliary->GetVcalibratedKTS();
doEngineStartup();
if (Boosted) doBoostControl();
doMAP();
doAirFlow();
doFuelFlow();
//Now that the fuel flow is done check if the mixture is too lean to run the engine
//Assume lean limit at 22 AFR for now - thats a thi of 0.668
//This might be a bit generous, but since there's currently no audiable warning of impending
//cutout in the form of misfiring and/or rough running its probably reasonable for now.
// if (equivalence_ratio < 0.668)
// Running = false;
doEnginePower();
if (IndicatedHorsePower < 0.1250) Running = false;
doEGT();
doCHT();
doOilTemperature();
doOilPressure();
if (Thruster->GetType() == FGThruster::ttPropeller) {
((FGPropeller*)Thruster)->SetAdvance(FCS->GetPropAdvance(EngineNumber));
((FGPropeller*)Thruster)->SetFeather(FCS->GetPropFeather(EngineNumber));
}
PowerAvailable = (HP * hptoftlbssec) - Thruster->GetPowerRequired();
Thruster->Calculate(PowerAvailable);
RunPostFunctions();
}
void FGPiston::Calculate(void)
{
// Input values.
p_amb = in.Pressure * psftopa;
double p = in.TotalPressure * psftopa;
p_ram = (p - p_amb) * Ram_Air_Factor + p_amb;
T_amb = RankineToKelvin(in.Temperature);
RunPreFunctions();
TotalDeltaT = ( in.TotalDeltaT < 1e-9 ) ? 1.0 : in.TotalDeltaT;
/* The thruster controls the engine RPM because it encapsulates the gear ratio and other transmission variables */
RPM = Thruster->GetEngineRPM();
MeanPistonSpeed_fps = ( RPM * Stroke) / (360); // AKA 2 * (RPM/60) * ( Stroke / 12) or 2NS
IAS = in.Vc;
doEngineStartup();
if (Boosted) doBoostControl();
doMAP();
doAirFlow();
doFuelFlow();
//Now that the fuel flow is done check if the mixture is too lean to run the engine
//Assume lean limit at 22 AFR for now - thats a thi of 0.668
//This might be a bit generous, but since there's currently no audiable warning of impending
//cutout in the form of misfiring and/or rough running its probably reasonable for now.
// if (equivalence_ratio < 0.668)
// Running = false;
doEnginePower();
if (IndicatedHorsePower < 0.1250) Running = false;
doEGT();
doCHT();
doOilTemperature();
doOilPressure();
if (Thruster->GetType() == FGThruster::ttPropeller) {
((FGPropeller*)Thruster)->SetAdvance(in.PropAdvance[EngineNumber]);
((FGPropeller*)Thruster)->SetFeather(in.PropFeather[EngineNumber]);
}
LoadThrusterInputs();
Thruster->Calculate(HP * hptoftlbssec);
RunPostFunctions();
}