X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FFDM%2FYASim%2FJet.cpp;h=f80cac543daee572160a6247eee53b9733672b67;hb=d66903e9ad63b91182ccc25d9bb82f18f8dd98b6;hp=200a743dbc2ae7a1b8d5475a54c20261bb122589;hpb=a682823adaf0fded092a7c6cfc5d099c27525ba8;p=flightgear.git

diff --git a/src/FDM/YASim/Jet.cpp b/src/FDM/YASim/Jet.cpp
index 200a743db..f80cac543 100644
--- a/src/FDM/YASim/Jet.cpp
+++ b/src/FDM/YASim/Jet.cpp
@@ -10,6 +10,7 @@ Jet::Jet()
     _reheat = 0;
     _rotControl = 0;
     _maxRot = 0;
+    _reverseThrust = false;
 
     // Initialize parameters for an early-ish subsonic turbojet.  More
     // recent turbofans will typically have a lower vMax, epr0, and
@@ -31,6 +32,7 @@ Jet::Jet()
     // And sanify the remaining junk, just in case.
     _running = true;
     _cranking = false;
+    _fuel = true;
     _epr = 1;
     _fuelFlow = 0;
     _egt = 273;
@@ -140,16 +142,22 @@ void Jet::integrate(float dt)
     const static float T0 = Atmosphere::getStdTemperature(0);
     const static float D0 = Atmosphere::getStdDensity(0);
 
-    float speed = -Math::dot3(_wind, _dir);
+    float spd = -Math::dot3(_wind, _dir);
 
     float statT, statP, statD;
-    Atmosphere::calcStaticAir(_pressure, _temp, _rho, speed,
+    Atmosphere::calcStaticAir(_pressure, _temp, _rho, spd,
                               &statP, &statT, &statD);
     _pressureCorrect = statP/P0;
     _tempCorrect = Math::sqrt(statT/T0);
 
+    // Handle running out of fuel.  This is a hack.  What should
+    // really happen is a simulation of ram air torque on the
+    // turbine.  This just forces the engine into ground idle.
+    if(_fuel == false)
+        _throttle = 0;
+
     // Linearly taper maxThrust to zero at vMax
-    float vCorr = 1 - (speed/_vMax);
+    float vCorr = spd<0 ? 1 : (spd<_vMax ? 1-spd/_vMax : 0);
 
     float maxThrust = _maxThrust * vCorr * (statD/D0);
     float setThrust = maxThrust * _throttle;
@@ -186,6 +194,9 @@ void Jet::integrate(float dt)
 						  // 3.5 times as much
 						  // fuel per thrust unit
     _egt = T0 + beta*ibeta0 * (_egt0 - T0);
+
+    // Thrust reverse handling:
+    if(_reverseThrust) _thrust *= -_reverseEff;
 }
 
 bool Jet::isRunning()